2020
Abeyratne, R M T B; Perera, P P R; Fernando, D M S
In: Nutrition, pp. 110942, 2020, ISSN: 0899-9007.
@article{ABEYRATNE2020110942,
title = {Obesity and cardiovascular risk among Sri Lankan adolescents; Association of adipokines with anthropometric indices of obesity and lipid profile.},
author = {R M T B Abeyratne and P P R Perera and D M S Fernando},
url = {http://www.sciencedirect.com/science/article/pii/S0899900720302252},
doi = {https://doi.org/10.1016/j.nut.2020.110942},
issn = {0899-9007},
year = {2020},
date = {2020-01-01},
journal = {Nutrition},
pages = {110942},
abstract = {Objective
: Obesity and overweight among adolescents pose a significant problem and are known to cause several physical and biochemical consequences during adulthood. The study was designed to identify the biomarkers of obesity and to describe the associations with selected metabolic derangements of obesity among Sri Lankan adolescents. Methods : The current study compared the characteristics of obese (n = 121) and normal weight (n = 263) adolescents including socio-demography, anthropometry and selected biochemical parameters such as lipid profile, serum leptin, adiponectin and high sensitivity C – reactive protein (hs – CRP). Enzyme linked immunosorbent assay (ELISA) technique and fully automated clinical chemistry analyzer were used to analyze the biochemical parameters among the adolescents aged 10 to 16 years. Results : The mean (SD) age of the sample is 13.1(1.9) years and the male to female ratio is 1:1. The mean (SD) weight of obese [55.70 (14.82) kg] was significantly higher than normal weight [41.63 (7.88) kg] children. Total cholesterol, triglycerides and low-density lipoprotein cholesterol, were significantly higher (p = 0.000) among obese compared to normal weight adolescents. High-density lipoprotein cholesterol was significantly lower among obese. Serum leptin and hs – CRP were higher among obese while adiponectin was lower in obese. In the multivariate analysis due to the confounding effects among these of the tested adipokines, serum leptin was the only predictor of abnormal lipid profile.
Conclusion
: Serum leptin, adiponectin and hs – CRP were found to be reliable biomarkers of predicting adiposity related metabolic derangements in adolescents. The obese showed derangements in lipid metabolism with abnormal lipid profiles compared to normal weight children.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Objective
: Obesity and overweight among adolescents pose a significant problem and are known to cause several physical and biochemical consequences during adulthood. The study was designed to identify the biomarkers of obesity and to describe the associations with selected metabolic derangements of obesity among Sri Lankan adolescents. Methods : The current study compared the characteristics of obese (n = 121) and normal weight (n = 263) adolescents including socio-demography, anthropometry and selected biochemical parameters such as lipid profile, serum leptin, adiponectin and high sensitivity C – reactive protein (hs – CRP). Enzyme linked immunosorbent assay (ELISA) technique and fully automated clinical chemistry analyzer were used to analyze the biochemical parameters among the adolescents aged 10 to 16 years. Results : The mean (SD) age of the sample is 13.1(1.9) years and the male to female ratio is 1:1. The mean (SD) weight of obese [55.70 (14.82) kg] was significantly higher than normal weight [41.63 (7.88) kg] children. Total cholesterol, triglycerides and low-density lipoprotein cholesterol, were significantly higher (p = 0.000) among obese compared to normal weight adolescents. High-density lipoprotein cholesterol was significantly lower among obese. Serum leptin and hs – CRP were higher among obese while adiponectin was lower in obese. In the multivariate analysis due to the confounding effects among these of the tested adipokines, serum leptin was the only predictor of abnormal lipid profile.
Conclusion
: Serum leptin, adiponectin and hs – CRP were found to be reliable biomarkers of predicting adiposity related metabolic derangements in adolescents. The obese showed derangements in lipid metabolism with abnormal lipid profiles compared to normal weight children.
: Obesity and overweight among adolescents pose a significant problem and are known to cause several physical and biochemical consequences during adulthood. The study was designed to identify the biomarkers of obesity and to describe the associations with selected metabolic derangements of obesity among Sri Lankan adolescents. Methods : The current study compared the characteristics of obese (n = 121) and normal weight (n = 263) adolescents including socio-demography, anthropometry and selected biochemical parameters such as lipid profile, serum leptin, adiponectin and high sensitivity C – reactive protein (hs – CRP). Enzyme linked immunosorbent assay (ELISA) technique and fully automated clinical chemistry analyzer were used to analyze the biochemical parameters among the adolescents aged 10 to 16 years. Results : The mean (SD) age of the sample is 13.1(1.9) years and the male to female ratio is 1:1. The mean (SD) weight of obese [55.70 (14.82) kg] was significantly higher than normal weight [41.63 (7.88) kg] children. Total cholesterol, triglycerides and low-density lipoprotein cholesterol, were significantly higher (p = 0.000) among obese compared to normal weight adolescents. High-density lipoprotein cholesterol was significantly lower among obese. Serum leptin and hs – CRP were higher among obese while adiponectin was lower in obese. In the multivariate analysis due to the confounding effects among these of the tested adipokines, serum leptin was the only predictor of abnormal lipid profile.
Conclusion
: Serum leptin, adiponectin and hs – CRP were found to be reliable biomarkers of predicting adiposity related metabolic derangements in adolescents. The obese showed derangements in lipid metabolism with abnormal lipid profiles compared to normal weight children.
Fernando, HSD; Hapugoda, Menaka; Perera, Rushika; IV, William Black C; Silva, BGDNK De
Gene Flow Patterns among Aedes aegypti (Diptera: Culicidae) Populations in Sri Lanka Journal Article
In: Insects, vol. 11, no. 3, pp. 169, 2020.
@article{fernando2020gene,
title = {Gene Flow Patterns among Aedes aegypti (Diptera: Culicidae) Populations in Sri Lanka},
author = {HSD Fernando and Menaka Hapugoda and Rushika Perera and William Black C IV and BGDNK De Silva},
url = {https://www.mdpi.com/2075-4450/11/3/169},
doi = {https://doi.org/10.3390/insects11030169},
year = {2020},
date = {2020-01-01},
journal = {Insects},
volume = {11},
number = {3},
pages = {169},
publisher = {Multidisciplinary Digital Publishing Institute},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Heendeniya, Saumya Nishange; Keerthirathna, Lakshika; Manawadu, Chamalika Kanthini; Dissanayake, Indeewarie Hemamali; Ali, Rizwan; Mashhour, Abdullah; Alzahrani, Hajar; Godakumbura, Pahan; Boudjelal, Mohamed; Peiris, Dinithi Champika; others,
In: Biomolecules, vol. 10, no. 2, pp. 165, 2020.
@article{heendeniya2020therapeutic,
title = {Therapeutic Efficacy of Nyctanthes arbor-tristis Flowers to Inhibit Proliferation of Acute and Chronic Primary Human Leukemia Cells, with Adipocyte Differentiation and in Silico Analysis of Interactions between Survivin Protein and Selected Secondary Metabolites},
author = {Saumya Nishange Heendeniya and Lakshika Keerthirathna and Chamalika Kanthini Manawadu and Indeewarie Hemamali Dissanayake and Rizwan Ali and Abdullah Mashhour and Hajar Alzahrani and Pahan Godakumbura and Mohamed Boudjelal and Dinithi Champika Peiris and others},
url = {https://www.mdpi.com/2218-273X/10/2/165},
doi = {https://doi.org/10.3390/biom10020165},
year = {2020},
date = {2020-01-01},
journal = {Biomolecules},
volume = {10},
number = {2},
pages = {165},
publisher = {Multidisciplinary Digital Publishing Institute},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kudavidanage, Enoka P; Dissanayake, DMI; Keerthirathna, WL; Nishshanke, N; Peiris, Dinithi L C
Commercial Formulation of Chlorpyrifos Alters Neurological Behaviors and Fertility Journal Article
In: Biology, vol. 9, no. 3, pp. 49, 2020.
@article{kudavidanage2020commercial,
title = {Commercial Formulation of Chlorpyrifos Alters Neurological Behaviors and Fertility},
author = {Enoka P Kudavidanage and DMI Dissanayake and WL Keerthirathna and N Nishshanke and Dinithi L C Peiris},
url = {https://www.mdpi.com/2079-7737/9/3/49},
doi = {https://doi.org/10.3390/biology9030049},
year = {2020},
date = {2020-01-01},
journal = {Biology},
volume = {9},
number = {3},
pages = {49},
publisher = {Multidisciplinary Digital Publishing Institute},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Fernando, HSD; Hapugoda, Menaka; Perera, Rushika; IV, William Black C; Silva, BGDNK De
Mitochondrial metabolic genes provide phylogeographic relationships of global collections of Aedes aegypti (Diptera: Culicidae) Journal Article
In: Plos one, vol. 15, no. 7, pp. e0235430, 2020.
@article{fernando2020mitochondrial,
title = {Mitochondrial metabolic genes provide phylogeographic relationships of global collections of Aedes aegypti (Diptera: Culicidae)},
author = {HSD Fernando and Menaka Hapugoda and Rushika Perera and William Black C IV and BGDNK De Silva},
url = {https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0235430},
doi = {doi.org/10.1371/journal.pone.0235430},
year = {2020},
date = {2020-01-01},
journal = {Plos one},
volume = {15},
number = {7},
pages = {e0235430},
publisher = {Public Library of Science San Francisco, CA USA},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Fernando, Sachini H D; Saavedra-Rodriguez, Karla; Perera, Rushika; Black, William C; Silva, BGD Nissanka Kolitha De
Resistance to commonly used insecticides and underlying mechanisms of resistance in Aedes aegypti (L.) from Sri Lanka Journal Article
In: Parasites & Vectors, vol. 13, no. 1, pp. 1–14, 2020.
@article{fernando2020resistance,
title = {Resistance to commonly used insecticides and underlying mechanisms of resistance in Aedes aegypti (L.) from Sri Lanka},
author = {Sachini H D Fernando and Karla Saavedra-Rodriguez and Rushika Perera and William C Black and BGD Nissanka Kolitha De Silva},
url = {https://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-020-04284-y},
doi = {DOI: 10.1186/s13071-020-04284-y},
year = {2020},
date = {2020-01-01},
journal = {Parasites & Vectors},
volume = {13},
number = {1},
pages = {1--14},
publisher = {BioMed Central},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jayathilake, J M N J; Guanthilake, K V K
Cnidarian toxins: recent evidences for potential therapeutic uses Journal Article
In: The European Zoological Journal, vol. 87, no. 1, pp. 708-713, 2020.
@article{doi:10.1080/24750263.2020.1837268,
title = {Cnidarian toxins: recent evidences for potential therapeutic uses},
author = {J M N J Jayathilake and K V K Guanthilake},
url = {https://doi.org/10.1080/24750263.2020.1837268},
doi = {10.1080/24750263.2020.1837268},
year = {2020},
date = {2020-01-01},
journal = {The European Zoological Journal},
volume = {87},
number = {1},
pages = {708-713},
publisher = {Taylor & Francis},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
2019
Fernando, Lalitha R S
Solid waste management of local governments in the Western Province of Sri Lanka: An implementation analysis Journal Article
In: Waste Management, vol. 84, pp. 194 - 203, 2019, ISSN: 0956-053X.
@article{FERNANDO2019194,
title = {Solid waste management of local governments in the Western Province of Sri Lanka: An implementation analysis},
author = {Lalitha R S Fernando},
url = {http://www.sciencedirect.com/science/article/pii/S0956053X18307086},
doi = {https://doi.org/10.1016/j.wasman.2018.11.030},
issn = {0956-053X},
year = {2019},
date = {2019-01-01},
journal = {Waste Management},
volume = {84},
pages = {194 - 203},
abstract = {The large-scale solid waste generation has been a critical issue in the world today. The absence of a sound national policy for Solid Waste Management (SWM) has caused tremendous negative environmental consequences in Sri Lanka. Despite various programs being implemented by the Municipal Councils and other local governments with the relevant authorities in managing solid waste, most of them have not been successful. Thus, the main purpose of this study is to examine major factors affecting successful policy implementation of the SWM. Further, the study identifies problems and challenges faced in the implementation of SWM. Both qualitative and quantitative methods were used to gather primary and secondary data. Interview and in-depth discussions were conducted with selected officers who are responsible for implementation of SWM system to identify problems and challenges at the implementation level. Among the 48 LGs in the Western Province, 50% (twenty-four) LGs were selected based on the stratified random sampling method for the quantitative analysis. Normally, in each LG, five officers are responsible for SWM. There are 10 officers in the Colombo Municipal Council who are responsible for SWM. Thus, the total population is 245. Thus, the sample is 125. The sample was consisting of Administrative Heads, Public Health Officer and related officers of each Local Government. A field survey was carried out with a structured questionnaire based on the literature review focusing on the variables of the study. The questionnaire was administered by a Research Assistant. The study found that the remuneration and other facilities of the staff, their commitment, the motivation and the support from the political leadership, the contribution of the society and the business community are significantly affecting the successful implementation of the SWM program. The SWM has not been successful at its implementation stage due to some administrative problems such as insufficient land for final dumping, composting and recycling, lack of necessary vehicles and an integrated SWM programme, lack of necessary instruments and modern technology, poor regulatory framework, lower labor productivity and quantity, lack of awareness of residents and inappropriate political interference. Finally, the study proposes policy recommendations for addressing those administrative problems and challenges towards efficient and effective solid waste management in the local governments in Sri Lanka.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The large-scale solid waste generation has been a critical issue in the world today. The absence of a sound national policy for Solid Waste Management (SWM) has caused tremendous negative environmental consequences in Sri Lanka. Despite various programs being implemented by the Municipal Councils and other local governments with the relevant authorities in managing solid waste, most of them have not been successful. Thus, the main purpose of this study is to examine major factors affecting successful policy implementation of the SWM. Further, the study identifies problems and challenges faced in the implementation of SWM. Both qualitative and quantitative methods were used to gather primary and secondary data. Interview and in-depth discussions were conducted with selected officers who are responsible for implementation of SWM system to identify problems and challenges at the implementation level. Among the 48 LGs in the Western Province, 50% (twenty-four) LGs were selected based on the stratified random sampling method for the quantitative analysis. Normally, in each LG, five officers are responsible for SWM. There are 10 officers in the Colombo Municipal Council who are responsible for SWM. Thus, the total population is 245. Thus, the sample is 125. The sample was consisting of Administrative Heads, Public Health Officer and related officers of each Local Government. A field survey was carried out with a structured questionnaire based on the literature review focusing on the variables of the study. The questionnaire was administered by a Research Assistant. The study found that the remuneration and other facilities of the staff, their commitment, the motivation and the support from the political leadership, the contribution of the society and the business community are significantly affecting the successful implementation of the SWM program. The SWM has not been successful at its implementation stage due to some administrative problems such as insufficient land for final dumping, composting and recycling, lack of necessary vehicles and an integrated SWM programme, lack of necessary instruments and modern technology, poor regulatory framework, lower labor productivity and quantity, lack of awareness of residents and inappropriate political interference. Finally, the study proposes policy recommendations for addressing those administrative problems and challenges towards efficient and effective solid waste management in the local governments in Sri Lanka.
Peiris, Chathuri; Gunatilake, Sameera R; Wewalwela, Jayani J; Vithanage, Meththika
Chapter 11 - Biochar for Sustainable Agriculture: Nutrient Dynamics, Soil Enzymes, and Crop Growth Book Section
In: Ok, Yong Sik; Tsang, Daniel C W; Bolan, Nanthi; Novak, J M (Ed.): Biochar from Biomass and Waste, pp. 211 - 224, Elsevier, 2019, ISBN: 978-0-12-811729-3.
@incollection{PEIRIS2019211,
title = {Chapter 11 - Biochar for Sustainable Agriculture: Nutrient Dynamics, Soil Enzymes, and Crop Growth},
author = {Chathuri Peiris and Sameera R Gunatilake and Jayani J Wewalwela and Meththika Vithanage},
editor = {Yong Sik Ok and Daniel C W Tsang and Nanthi Bolan and J M Novak},
url = {http://www.sciencedirect.com/science/article/pii/B978012811729300011X},
doi = {https://doi.org/10.1016/B978-0-12-811729-3.00011-X},
isbn = {978-0-12-811729-3},
year = {2019},
date = {2019-01-01},
booktitle = {Biochar from Biomass and Waste},
pages = {211 - 224},
publisher = {Elsevier},
abstract = {This chapter is an attempt to bring together the knowledge centering the ubiquitous topic of sustainable agriculture and the impact biochar (BC) application has on the various attributes pertaining to it. With its growing fame as a soil amendment for cultivation purposes, BC is found to valorize soil nutrient and enzyme dynamics, bringing forth an enhancement in soil fertility. Biochar can act either as a direct or indirect nutrient source. Depending on the feedstock type and pyrolysis conditions employed, BC rich in bioavailable nutrients becomes a direct contributor to the soil nutrient pool. The indirect contribution, in contrast, includes altering the soil physiochemical properties such as pH, soil organic matter, water-holding capacity, water infiltration and soil aeration. Improved retention of micro and macro nutrients which minimizes the nutrient-leaching effect is also a discernible consequence of biochar utilization. Microorganisms, an intricate part of the soil ecosystem and a source of soil enzyme activity, are comprehensively studied to show what effects are posed as a sequel of BC implementation. The diverse means by which BC gets involved in elevating soil quality manages to procure the desired economic and environmental benefits anticipated of sustainable agriculture.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
This chapter is an attempt to bring together the knowledge centering the ubiquitous topic of sustainable agriculture and the impact biochar (BC) application has on the various attributes pertaining to it. With its growing fame as a soil amendment for cultivation purposes, BC is found to valorize soil nutrient and enzyme dynamics, bringing forth an enhancement in soil fertility. Biochar can act either as a direct or indirect nutrient source. Depending on the feedstock type and pyrolysis conditions employed, BC rich in bioavailable nutrients becomes a direct contributor to the soil nutrient pool. The indirect contribution, in contrast, includes altering the soil physiochemical properties such as pH, soil organic matter, water-holding capacity, water infiltration and soil aeration. Improved retention of micro and macro nutrients which minimizes the nutrient-leaching effect is also a discernible consequence of biochar utilization. Microorganisms, an intricate part of the soil ecosystem and a source of soil enzyme activity, are comprehensively studied to show what effects are posed as a sequel of BC implementation. The diverse means by which BC gets involved in elevating soil quality manages to procure the desired economic and environmental benefits anticipated of sustainable agriculture.
Agnihotri, Ashish; Ahirwal, Jitendra; Ahmed, Israr; Ashiq, Ahamed; Bakshi, Palak; Balasundaram, Usha; Banerjee, Aditya; Bhardwaj, Renu; Biswas, Jayanta Kumar; Sekhar, Akila Chandra; Daghan, Hatice; Deo, Bandita; Dhir, Bhupinder; Gantait, Saikat; Govindan, Ganesan; Griga, Miroslav; Gunarathne, Viraj; Iqbal, Sithy Sabeera; Iqbal, Mohamed Cassim Mohamed; Kaur, Ravdeep; Keeran, Nisha Surendran; Kirti, Pulugurtha Bharadwaja; Kohli, Sukhmeen Kaur; Kumar, Abhay; Kumar, Adarsh; Kumar, Vinod; Ludvíková, Michaela; Mayakaduwa, Sonia; Mir, Bilal Ahmad; Nangia, Ashwini Kumar; Nirupa, Nadella; Reddy, Puli Chandra Obul; Panigrahi, Jitendriya; Parida, Ajay Kumar; Pathak, Lakshmi; Prasad, Majeti Narasimha Vara; Raju, Kandi Suresh; Reddy, Malireddy Kodandarami; Rout, Gyana Ranjan; Roychoudhury, Aryadeep; Sarangi, Bijaya Ketan; Sarma, Hemen; Sebastain, Abin; Seth, Chandra Shekhar; Shah, Kavita; Shukla, Pawan; Sravani, Konduru; Sujatha, Mulpuri; Swain, Dhaneswar; Tarakeswari, Muddanuru; Thukral, Ashwani Kumar; Tiwari, Sarita; Tripti,; Usmani, Zeba; Verma, Sandeep Kumar; Vithanage, Meththika; Warra, Aliyu Ahmad; Weerakoon, Shyama Ranjani; Yadav, Poonam
List of Contributors Book Section
In: Prasad, Majeti Narasimha Vara (Ed.): Transgenic Plant Technology for Remediation of Toxic Metals and Metalloids, pp. xiii - xv, Academic Press, 2019, ISBN: 978-0-12-814389-6.
@incollection{AGNIHOTRI2019xiii,
title = {List of Contributors},
author = {Ashish Agnihotri and Jitendra Ahirwal and Israr Ahmed and Ahamed Ashiq and Palak Bakshi and Usha Balasundaram and Aditya Banerjee and Renu Bhardwaj and Jayanta Kumar Biswas and Akila Chandra Sekhar and Hatice Daghan and Bandita Deo and Bhupinder Dhir and Saikat Gantait and Ganesan Govindan and Miroslav Griga and Viraj Gunarathne and Sithy Sabeera Iqbal and Mohamed Cassim Mohamed Iqbal and Ravdeep Kaur and Nisha Surendran Keeran and Pulugurtha Bharadwaja Kirti and Sukhmeen Kaur Kohli and Abhay Kumar and Adarsh Kumar and Vinod Kumar and Michaela Ludvíková and Sonia Mayakaduwa and Bilal Ahmad Mir and Ashwini Kumar Nangia and Nadella Nirupa and Puli Chandra Obul Reddy and Jitendriya Panigrahi and Ajay Kumar Parida and Lakshmi Pathak and Majeti Narasimha Vara Prasad and Kandi Suresh Raju and Malireddy Kodandarami Reddy and Gyana Ranjan Rout and Aryadeep Roychoudhury and Bijaya Ketan Sarangi and Hemen Sarma and Abin Sebastain and Chandra Shekhar Seth and Kavita Shah and Pawan Shukla and Konduru Sravani and Mulpuri Sujatha and Dhaneswar Swain and Muddanuru Tarakeswari and Ashwani Kumar Thukral and Sarita Tiwari and Tripti and Zeba Usmani and Sandeep Kumar Verma and Meththika Vithanage and Aliyu Ahmad Warra and Shyama Ranjani Weerakoon and Poonam Yadav},
editor = {Majeti Narasimha Vara Prasad},
url = {http://www.sciencedirect.com/science/article/pii/B9780128143896000298},
doi = {https://doi.org/10.1016/B978-0-12-814389-6.00029-8},
isbn = {978-0-12-814389-6},
year = {2019},
date = {2019-01-01},
booktitle = {Transgenic Plant Technology for Remediation of Toxic Metals and Metalloids},
pages = {xiii - xv},
publisher = {Academic Press},
keywords = {},
pubstate = {published},
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Gunarathne, Viraj; Mayakaduwa, Sonia; Ashiq, Ahamed; Weerakoon, Shyama Ranjani; Biswas, Jayanta Kumar; Vithanage, Meththika
Chapter 5 - Transgenic Plants: Benefits, Applications, and Potential Risks in Phytoremediation Book Section
In: Prasad, Majeti Narasimha Vara (Ed.): Transgenic Plant Technology for Remediation of Toxic Metals and Metalloids, pp. 89 - 102, Academic Press, 2019, ISBN: 978-0-12-814389-6.
@incollection{GUNARATHNE201989,
title = {Chapter 5 - Transgenic Plants: Benefits, Applications, and Potential Risks in Phytoremediation},
author = {Viraj Gunarathne and Sonia Mayakaduwa and Ahamed Ashiq and Shyama Ranjani Weerakoon and Jayanta Kumar Biswas and Meththika Vithanage},
editor = {Majeti Narasimha Vara Prasad},
url = {http://www.sciencedirect.com/science/article/pii/B9780128143896000055},
doi = {https://doi.org/10.1016/B978-0-12-814389-6.00005-5},
isbn = {978-0-12-814389-6},
year = {2019},
date = {2019-01-01},
booktitle = {Transgenic Plant Technology for Remediation of Toxic Metals and Metalloids},
pages = {89 - 102},
publisher = {Academic Press},
abstract = {Phytoremediation has gained the attention all over the world as one of the most cost-effective and sustainable approaches for removal, sequestration, and/or detoxification of contaminants especially metals and metalloids from land and freshwater bodies. However, field studies indicated that these contaminant removal rates and tolerability of the conventional plant species are inadequate. Therefore, transgenic plants endowed with extended capability for phytoremediation have emerged as a promising solution to overcome common weaknesses of conventional plants that have been used in the remediation process. Scientists were able to develop transgenic plants capable of successful removal of environmental contaminants including heavy metal(loid)s like Cd, Co, Cu, Pb, Zn, Se, As, and Hg. Although transgenic plants bring favorable advantages to phytoremediation, there are many concerns regarding human health and environmental sustainability. Therefore, this chapter extensively discusses the benefits and emerging applications of transgenic plants in phytoremediation to remediate the extraction of heavy metals and metalloids. This chapter also discusses the drawbacks and possible risks associated with the transgenic plants and the regulatory issues that could possibly arise from these transgenic species.},
keywords = {},
pubstate = {published},
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}
Phytoremediation has gained the attention all over the world as one of the most cost-effective and sustainable approaches for removal, sequestration, and/or detoxification of contaminants especially metals and metalloids from land and freshwater bodies. However, field studies indicated that these contaminant removal rates and tolerability of the conventional plant species are inadequate. Therefore, transgenic plants endowed with extended capability for phytoremediation have emerged as a promising solution to overcome common weaknesses of conventional plants that have been used in the remediation process. Scientists were able to develop transgenic plants capable of successful removal of environmental contaminants including heavy metal(loid)s like Cd, Co, Cu, Pb, Zn, Se, As, and Hg. Although transgenic plants bring favorable advantages to phytoremediation, there are many concerns regarding human health and environmental sustainability. Therefore, this chapter extensively discusses the benefits and emerging applications of transgenic plants in phytoremediation to remediate the extraction of heavy metals and metalloids. This chapter also discusses the drawbacks and possible risks associated with the transgenic plants and the regulatory issues that could possibly arise from these transgenic species.
Fernando, Ruwandi W D; Tantrigoda, D A; Rosa, S R D; Jayasundara, Dilushan R
Infrared thermography as a non-destructive testing method for adhesively bonded textile structures Journal Article
In: Infrared Physics & Technology, 2019, ISSN: 1350-4495.
@article{RUWANDIFERNANDO2019,
title = {Infrared thermography as a non-destructive testing method for adhesively bonded textile structures},
author = {Ruwandi W D Fernando and D A Tantrigoda and S R D Rosa and Dilushan R Jayasundara},
url = {http://www.sciencedirect.com/science/article/pii/S1350449518306467},
doi = {https://doi.org/10.1016/j.infrared.2019.03.001},
issn = {1350-4495},
year = {2019},
date = {2019-01-01},
journal = {Infrared Physics & Technology},
abstract = {In apparel manufacturing, textile bonding with adhesives has become an evolving and a popular construction method. In this research, InfraRed Thermography (IRT) was investigated as a potential Non Destructive Testing (NDT) method for adhesively bonded textile structures. It is found that the spatial homogeneity of the temperature distribution in the bonded area correlates with the Peel Strength (PS) of that bond. A threshold value for the in-homogeneity in the thermal distribution can be set to distinguish between a bad bond and a good bond. IRT results also elucidate on a two-step glue distribution pattern during the thermal treatment that influence the PS of the bond. The use of Fast Fourier Transform (FFT) technique to analyze the thermal images for the spatial extent of temperature distribution within the bonded seam and for possible correlation with the bond strength is also discussed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In apparel manufacturing, textile bonding with adhesives has become an evolving and a popular construction method. In this research, InfraRed Thermography (IRT) was investigated as a potential Non Destructive Testing (NDT) method for adhesively bonded textile structures. It is found that the spatial homogeneity of the temperature distribution in the bonded area correlates with the Peel Strength (PS) of that bond. A threshold value for the in-homogeneity in the thermal distribution can be set to distinguish between a bad bond and a good bond. IRT results also elucidate on a two-step glue distribution pattern during the thermal treatment that influence the PS of the bond. The use of Fast Fourier Transform (FFT) technique to analyze the thermal images for the spatial extent of temperature distribution within the bonded seam and for possible correlation with the bond strength is also discussed.
Ashiq, Ahmed; Adassooriya, Nadeesh M; Sarkar, Binoy; Rajapaksha, Anushka Upamali; Ok, Yong Sik; Vithanage, Meththika
Municipal solid waste biochar-bentonite composite for the removal of antibiotic ciprofloxacin from aqueous media Journal Article
In: Journal of Environmental Management, vol. 236, pp. 428 - 435, 2019, ISSN: 0301-4797.
@article{ASHIQ2019428,
title = {Municipal solid waste biochar-bentonite composite for the removal of antibiotic ciprofloxacin from aqueous media},
author = {Ahmed Ashiq and Nadeesh M Adassooriya and Binoy Sarkar and Anushka Upamali Rajapaksha and Yong Sik Ok and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/S0301479719301471},
doi = {https://doi.org/10.1016/j.jenvman.2019.02.006},
issn = {0301-4797},
year = {2019},
date = {2019-01-01},
journal = {Journal of Environmental Management},
volume = {236},
pages = {428 - 435},
abstract = {This study investigates the adsorption of ciprofloxacin (CPX) onto a municipal solid waste derived biochar (MSW-BC) and a composite material developed by combining the biochar with bentonite clay. A bentonite-MSW slurry was first prepared at 1:5 ratio (w/w), and then pyrolyzed at 450 °C for 30 min. The composite was characterized by scanning electron microscopy (SEM), Powder X-ray diffraction (PXRD) and Fourier transform infrared (FTIR) spectroscopy before and after CPX adsorption. Batch experiments were conducted to assess the effect of pH, reaction time and adsorbate dosage. The SEM images confirmed successful modification of the biochar with bentonite showing plate like structures. The PXRD patterns showed changes in the crystalline lattice of both MSW-BC and the composite before and after CPX adsorption whereas the FTIR spectra indicated merging and widening of specific bands after CPX adsorption. The optimum CPX adsorption was achieved at pH 6, and the maximum adsorption capacity of the composite calculated via isotherm modeling was 190 mg/g, which was about 40% higher than the pristine MSW-BC. The Hill isotherm model along with pseudo-second order and Elovich kinetic models showed the best fit to the adsorption data. The most plausible mechanism for increased adsorption capacity is the increased active sites of the composites for CPX adsorption through induced electrostatic interactions between the functional groups of the composite and CPX molecules. The added reactive surfaces in the composite because of bentonite incorporation, and the intercalation of CPX in the clay interlayers improved the adsorption of CPX by the biochar-bentonite composite compared to the pristine biochar. Thus, MSW-BC-bentonite composites could be considered as a potential material for remediating pharmaceuticals in aqueous media.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study investigates the adsorption of ciprofloxacin (CPX) onto a municipal solid waste derived biochar (MSW-BC) and a composite material developed by combining the biochar with bentonite clay. A bentonite-MSW slurry was first prepared at 1:5 ratio (w/w), and then pyrolyzed at 450 °C for 30 min. The composite was characterized by scanning electron microscopy (SEM), Powder X-ray diffraction (PXRD) and Fourier transform infrared (FTIR) spectroscopy before and after CPX adsorption. Batch experiments were conducted to assess the effect of pH, reaction time and adsorbate dosage. The SEM images confirmed successful modification of the biochar with bentonite showing plate like structures. The PXRD patterns showed changes in the crystalline lattice of both MSW-BC and the composite before and after CPX adsorption whereas the FTIR spectra indicated merging and widening of specific bands after CPX adsorption. The optimum CPX adsorption was achieved at pH 6, and the maximum adsorption capacity of the composite calculated via isotherm modeling was 190 mg/g, which was about 40% higher than the pristine MSW-BC. The Hill isotherm model along with pseudo-second order and Elovich kinetic models showed the best fit to the adsorption data. The most plausible mechanism for increased adsorption capacity is the increased active sites of the composites for CPX adsorption through induced electrostatic interactions between the functional groups of the composite and CPX molecules. The added reactive surfaces in the composite because of bentonite incorporation, and the intercalation of CPX in the clay interlayers improved the adsorption of CPX by the biochar-bentonite composite compared to the pristine biochar. Thus, MSW-BC-bentonite composites could be considered as a potential material for remediating pharmaceuticals in aqueous media.
Thathsara, S K T; Cooray, Asitha T; Ratnaweera, Dilru R; Mudiyanselage, Thilini Kuruwita
A novel tri-metal composite incorporated polyacrylamide hybrid material for the removal of arsenate, chromate and fluoride from aqueous media Journal Article
In: Environmental Technology & Innovation, vol. 14, pp. 100353, 2019, ISSN: 2352-1864.
@article{THATHSARA2019100353,
title = {A novel tri-metal composite incorporated polyacrylamide hybrid material for the removal of arsenate, chromate and fluoride from aqueous media},
author = {S K T Thathsara and Asitha T Cooray and Dilru R Ratnaweera and Thilini Kuruwita Mudiyanselage},
url = {http://www.sciencedirect.com/science/article/pii/S2352186418302773},
doi = {https://doi.org/10.1016/j.eti.2019.100353},
issn = {2352-1864},
year = {2019},
date = {2019-01-01},
journal = {Environmental Technology & Innovation},
volume = {14},
pages = {100353},
abstract = {Excessive amounts of fluoride ions and other heavy metals in drinking water instigate a solemn threat to human health. Even though materials with specific binding ability towards these ions have been developed, it is yet a challenge to meet the practical utility of developing an efficient remedy as such. With this regard, a novel tri-metal composite incorporated polyacrylamide (TCIP) has developed. TCIP has shown a significant binding efficiency towards arsenate, chromate and fluoride ions in the presence of the other competing anions. The maximum adsorption capacities (qmax) of 43.85, 42.25 and 107.52 mg/g were achieved for arsenate, chromate and fluoride respectively at 300 K and in pH 7.00. Arsenate, chromate and fluoride adsorption is highly pH dependent. Monolayer adsorption of arsenate, chromate and fluoride ions was observed and adsorption data were found well behaved with the Langmuir adsorption isotherm. Arsenate, chromate and fluoride adsorption to TCIP has shown pseudo-second order adsorption kinetics, and no leaching of metal ions was observed from the metal composite into the aqueous medium.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Excessive amounts of fluoride ions and other heavy metals in drinking water instigate a solemn threat to human health. Even though materials with specific binding ability towards these ions have been developed, it is yet a challenge to meet the practical utility of developing an efficient remedy as such. With this regard, a novel tri-metal composite incorporated polyacrylamide (TCIP) has developed. TCIP has shown a significant binding efficiency towards arsenate, chromate and fluoride ions in the presence of the other competing anions. The maximum adsorption capacities (qmax) of 43.85, 42.25 and 107.52 mg/g were achieved for arsenate, chromate and fluoride respectively at 300 K and in pH 7.00. Arsenate, chromate and fluoride adsorption is highly pH dependent. Monolayer adsorption of arsenate, chromate and fluoride ions was observed and adsorption data were found well behaved with the Langmuir adsorption isotherm. Arsenate, chromate and fluoride adsorption to TCIP has shown pseudo-second order adsorption kinetics, and no leaching of metal ions was observed from the metal composite into the aqueous medium.
Ratnayake, W M K M; Suresh, T S; Abeysekera, A M; Salim, N; Chandrika, U G
Acute anti-inflammatory and anti-nociceptive activities of crude extracts, alkaloid fraction and evolitrine from Acronychia pedunculata leaves Journal Article
In: Journal of Ethnopharmacology, pp. 111827, 2019, ISSN: 0378-8741.
@article{RATNAYAKE2019111827,
title = {Acute anti-inflammatory and anti-nociceptive activities of crude extracts, alkaloid fraction and evolitrine from Acronychia pedunculata leaves},
author = {W M K M Ratnayake and T S Suresh and A M Abeysekera and N Salim and U G Chandrika},
url = {http://www.sciencedirect.com/science/article/pii/S0378874118350025},
doi = {https://doi.org/10.1016/j.jep.2019.111827},
issn = {0378-8741},
year = {2019},
date = {2019-01-01},
journal = {Journal of Ethnopharmacology},
pages = {111827},
abstract = {Ethnopharmacological relevance
Acronychia pedunculata (family: Rutaceae) is one of the commonly used medicinal plants in Sri Lankan traditional medicine. Different parts of this plant are used for the treatment of inflammatory conditions in the form of medicinal oils and herbal porridge.
Aim of the study
The present study aimed to evaluate the anti-nociceptive activity and anti-inflammatory activity with their mechanisms and the acute toxicity of crude extracts of the fresh leaves of A. pedunculata for scientific validation of the ethnopharmacological claims for this plant. Further, attention has been focused on the isolation of active compounds from active fractions of the crude extracts.
Materials and methods
The acute anti-inflammatory effect of the aqueous (AELA) and 70% ethanol crude extracts (EELA) and alkaloid fraction of A. pedunculata leaves were evaluated by the determination of inhibition of hind paw oedema induced by carrageenan in Wistar rats. Evolitrine was identified as the major alkaloid with significant bioactivities by column chromatography and NMR. The anti-nociceptive and anti-histamine activities of EELA and evolitrine were evaluated by acetic acid induced writhing and wheal formation tests respectively. In addition, in-vitro (2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay) and in-vivo (lipid peroxidation assay) anti-oxidant activity, nitric oxide inhibitory activity and acute toxicity of EELA were evaluated.
Results
Acute anti-inflammatory activity of AELA and EELA were dose-dependent. EELA was more active than AELA. The 200 mg/kg body weight (b. w.) dose of EELA was found as the minimum effective dose with maximum inhibition (78%) of oedema at 5th hour compared to the negative control (p < 0.05). Evolitrine was isolated and identified as an active anti-inflammatory and analgesic compound from active alkaloid fraction of EELA. Evolitrine showed activity enhancement when compared with crude EELA. The anti-inflammatory and analgesic activities of evolitrine (50 mg/kg b. w.) were comparable to that of reference drugs indomethacin (5 mg/kg b. w) and acetylsalicylic acid (100 mg/kg b. w.). The significant (p < 0.05) anti-histamine activity, DPPH scavenging in-vitro anti-oxidant activity, in-vivo lipid peroxidation inhibitory activity in-vivo, NO inhibitory activity of EELA as compared with relevant negative controls, were identified as probable mechanisms which mediated its anti-inflammatory action. Further, EELA showed a high safety margin in the limited dose acute toxicity study.
Conclusion
The findings of the current study rationalize the usage of leaves of A. pedunculata in Sri Lankan traditional medicine as an analgesic and anti-inflammatory agent. Possible mechanisms mediating this activity included anti-histamine, anti-oxidant and NO inhibitory activities. Evolitrine is the major analgesic and anti-inflammatory compound isolated from the active alkaloid fraction of EELA.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ethnopharmacological relevance
Acronychia pedunculata (family: Rutaceae) is one of the commonly used medicinal plants in Sri Lankan traditional medicine. Different parts of this plant are used for the treatment of inflammatory conditions in the form of medicinal oils and herbal porridge.
Aim of the study
The present study aimed to evaluate the anti-nociceptive activity and anti-inflammatory activity with their mechanisms and the acute toxicity of crude extracts of the fresh leaves of A. pedunculata for scientific validation of the ethnopharmacological claims for this plant. Further, attention has been focused on the isolation of active compounds from active fractions of the crude extracts.
Materials and methods
The acute anti-inflammatory effect of the aqueous (AELA) and 70% ethanol crude extracts (EELA) and alkaloid fraction of A. pedunculata leaves were evaluated by the determination of inhibition of hind paw oedema induced by carrageenan in Wistar rats. Evolitrine was identified as the major alkaloid with significant bioactivities by column chromatography and NMR. The anti-nociceptive and anti-histamine activities of EELA and evolitrine were evaluated by acetic acid induced writhing and wheal formation tests respectively. In addition, in-vitro (2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay) and in-vivo (lipid peroxidation assay) anti-oxidant activity, nitric oxide inhibitory activity and acute toxicity of EELA were evaluated.
Results
Acute anti-inflammatory activity of AELA and EELA were dose-dependent. EELA was more active than AELA. The 200 mg/kg body weight (b. w.) dose of EELA was found as the minimum effective dose with maximum inhibition (78%) of oedema at 5th hour compared to the negative control (p < 0.05). Evolitrine was isolated and identified as an active anti-inflammatory and analgesic compound from active alkaloid fraction of EELA. Evolitrine showed activity enhancement when compared with crude EELA. The anti-inflammatory and analgesic activities of evolitrine (50 mg/kg b. w.) were comparable to that of reference drugs indomethacin (5 mg/kg b. w) and acetylsalicylic acid (100 mg/kg b. w.). The significant (p < 0.05) anti-histamine activity, DPPH scavenging in-vitro anti-oxidant activity, in-vivo lipid peroxidation inhibitory activity in-vivo, NO inhibitory activity of EELA as compared with relevant negative controls, were identified as probable mechanisms which mediated its anti-inflammatory action. Further, EELA showed a high safety margin in the limited dose acute toxicity study.
Conclusion
The findings of the current study rationalize the usage of leaves of A. pedunculata in Sri Lankan traditional medicine as an analgesic and anti-inflammatory agent. Possible mechanisms mediating this activity included anti-histamine, anti-oxidant and NO inhibitory activities. Evolitrine is the major analgesic and anti-inflammatory compound isolated from the active alkaloid fraction of EELA.
Acronychia pedunculata (family: Rutaceae) is one of the commonly used medicinal plants in Sri Lankan traditional medicine. Different parts of this plant are used for the treatment of inflammatory conditions in the form of medicinal oils and herbal porridge.
Aim of the study
The present study aimed to evaluate the anti-nociceptive activity and anti-inflammatory activity with their mechanisms and the acute toxicity of crude extracts of the fresh leaves of A. pedunculata for scientific validation of the ethnopharmacological claims for this plant. Further, attention has been focused on the isolation of active compounds from active fractions of the crude extracts.
Materials and methods
The acute anti-inflammatory effect of the aqueous (AELA) and 70% ethanol crude extracts (EELA) and alkaloid fraction of A. pedunculata leaves were evaluated by the determination of inhibition of hind paw oedema induced by carrageenan in Wistar rats. Evolitrine was identified as the major alkaloid with significant bioactivities by column chromatography and NMR. The anti-nociceptive and anti-histamine activities of EELA and evolitrine were evaluated by acetic acid induced writhing and wheal formation tests respectively. In addition, in-vitro (2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay) and in-vivo (lipid peroxidation assay) anti-oxidant activity, nitric oxide inhibitory activity and acute toxicity of EELA were evaluated.
Results
Acute anti-inflammatory activity of AELA and EELA were dose-dependent. EELA was more active than AELA. The 200 mg/kg body weight (b. w.) dose of EELA was found as the minimum effective dose with maximum inhibition (78%) of oedema at 5th hour compared to the negative control (p < 0.05). Evolitrine was isolated and identified as an active anti-inflammatory and analgesic compound from active alkaloid fraction of EELA. Evolitrine showed activity enhancement when compared with crude EELA. The anti-inflammatory and analgesic activities of evolitrine (50 mg/kg b. w.) were comparable to that of reference drugs indomethacin (5 mg/kg b. w) and acetylsalicylic acid (100 mg/kg b. w.). The significant (p < 0.05) anti-histamine activity, DPPH scavenging in-vitro anti-oxidant activity, in-vivo lipid peroxidation inhibitory activity in-vivo, NO inhibitory activity of EELA as compared with relevant negative controls, were identified as probable mechanisms which mediated its anti-inflammatory action. Further, EELA showed a high safety margin in the limited dose acute toxicity study.
Conclusion
The findings of the current study rationalize the usage of leaves of A. pedunculata in Sri Lankan traditional medicine as an analgesic and anti-inflammatory agent. Possible mechanisms mediating this activity included anti-histamine, anti-oxidant and NO inhibitory activities. Evolitrine is the major analgesic and anti-inflammatory compound isolated from the active alkaloid fraction of EELA.
Ariyaratne, M K A; Fernando, T G I; Weerakoon, S
Solving systems of nonlinear equations using a modified firefly algorithm (MODFA) Journal Article
In: Swarm and Evolutionary Computation, 2019, ISSN: 2210-6502.
@article{ARIYARATNE2019,
title = {Solving systems of nonlinear equations using a modified firefly algorithm (MODFA)},
author = {M K A Ariyaratne and T G I Fernando and S Weerakoon},
url = {http://www.sciencedirect.com/science/article/pii/S2210650217306107},
doi = {https://doi.org/10.1016/j.swevo.2019.03.010},
issn = {2210-6502},
year = {2019},
date = {2019-01-01},
journal = {Swarm and Evolutionary Computation},
abstract = {Most numerical methods that are being used to solve systems of nonlinear equations require the differentiability of the functions and acceptable initial guesses. However, some optimization techniques have overcome these problems, but they are unable to provide more than one root approximation simultaneously. In this paper, we present a modified firefly algorithm treating the problem as an optimization problem, which is capable of giving multiple root approximations simultaneously within a reasonable state space. The new method does not concern initial guesses, differentiability and even the continuity of the functions. Results obtained are encouraging, giving sufficient evidence that the algorithm works well. We further illustrate the viability of our method using benchmark systems found in the literature.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Most numerical methods that are being used to solve systems of nonlinear equations require the differentiability of the functions and acceptable initial guesses. However, some optimization techniques have overcome these problems, but they are unable to provide more than one root approximation simultaneously. In this paper, we present a modified firefly algorithm treating the problem as an optimization problem, which is capable of giving multiple root approximations simultaneously within a reasonable state space. The new method does not concern initial guesses, differentiability and even the continuity of the functions. Results obtained are encouraging, giving sufficient evidence that the algorithm works well. We further illustrate the viability of our method using benchmark systems found in the literature.
Premarathna, K S D; Rajapaksha, Anushka Upamali; Adassoriya, Nadeesh; Sarkar, Binoy; Sirimuthu, Narayana M S; Cooray, Asitha; Ok, Yong Sik; Vithanage, Meththika
Clay-biochar composites for sorptive removal of tetracycline antibiotic in aqueous media Journal Article
In: Journal of Environmental Management, vol. 238, pp. 315 - 322, 2019, ISSN: 0301-4797.
@article{PREMARATHNA2019315,
title = {Clay-biochar composites for sorptive removal of tetracycline antibiotic in aqueous media},
author = {K S D Premarathna and Anushka Upamali Rajapaksha and Nadeesh Adassoriya and Binoy Sarkar and Narayana M S Sirimuthu and Asitha Cooray and Yong Sik Ok and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/S0301479719302208},
doi = {https://doi.org/10.1016/j.jenvman.2019.02.069},
issn = {0301-4797},
year = {2019},
date = {2019-01-01},
journal = {Journal of Environmental Management},
volume = {238},
pages = {315 - 322},
abstract = {The focus of this research was to synthesize novel clay-biochar composites by incorporating montmorillonite (MMT) and red earth (RE) clay materials in a municipal solid waste (MSW) biochar for the adsorptive removal of tetracycline (TC) from aqueous media. X-ray Fluorescence Analysis (XRF), Fourier Transform Infrared Spectroscopy (FTIR), Powder X-ray Diffraction (PXRD) and Scanning Electron Microscopy (SEM) were used for the characterization of the synthesized raw biochar (MSW-BC) and clay-biochar composites (MSW-MMT and MSW-RE). Results showed that minute clay particles were dispersed on biochar surfaces. The FTIR bands due to Si-O functional group vibrations in the spectra of the clay-biochar composites provided further evidence for successful composite formation. The kinetic TC adsorption data of MSW-MMT were well fitted to the Elovich model expressing high surface activity of biochar and involvement of multiple mechanisms in the adsorption. The kinetic TC adsorption data of MSW-BC and MSW-RE were fitted to the pseudo second order model indicating dominant contribution of chemisorption mechanism during the adsorption. The adsorption differentiation obtained in the kinetic studies was mainly due to the structure of the combined clay material. The adsorption isotherm data of all the adsorbents were well fitted to the Freundlich model suggesting that the adsorption of TC onto the materials occurred via both physisorption and chemisorption mechanisms. In comparison to the raw biochar and MSW-RE, MSW-MMT exhibited higher TC adsorption capacity. Therefore, MSW-MMT clay-biochar composite could be applied in the remediation of TC antibiotic residues in contaminated aqueous media.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The focus of this research was to synthesize novel clay-biochar composites by incorporating montmorillonite (MMT) and red earth (RE) clay materials in a municipal solid waste (MSW) biochar for the adsorptive removal of tetracycline (TC) from aqueous media. X-ray Fluorescence Analysis (XRF), Fourier Transform Infrared Spectroscopy (FTIR), Powder X-ray Diffraction (PXRD) and Scanning Electron Microscopy (SEM) were used for the characterization of the synthesized raw biochar (MSW-BC) and clay-biochar composites (MSW-MMT and MSW-RE). Results showed that minute clay particles were dispersed on biochar surfaces. The FTIR bands due to Si-O functional group vibrations in the spectra of the clay-biochar composites provided further evidence for successful composite formation. The kinetic TC adsorption data of MSW-MMT were well fitted to the Elovich model expressing high surface activity of biochar and involvement of multiple mechanisms in the adsorption. The kinetic TC adsorption data of MSW-BC and MSW-RE were fitted to the pseudo second order model indicating dominant contribution of chemisorption mechanism during the adsorption. The adsorption differentiation obtained in the kinetic studies was mainly due to the structure of the combined clay material. The adsorption isotherm data of all the adsorbents were well fitted to the Freundlich model suggesting that the adsorption of TC onto the materials occurred via both physisorption and chemisorption mechanisms. In comparison to the raw biochar and MSW-RE, MSW-MMT exhibited higher TC adsorption capacity. Therefore, MSW-MMT clay-biochar composite could be applied in the remediation of TC antibiotic residues in contaminated aqueous media.
Ashiq, Ahamed; Kulkarni, Janhavi; Vithanage, Meththika
Chapter 10 - Hydrometallurgical Recovery of Metals From E-waste Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika (Ed.): Electronic Waste Management and Treatment Technology, pp. 225 - 246, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816190-6.
@incollection{ASHIQ2019225,
title = {Chapter 10 - Hydrometallurgical Recovery of Metals From E-waste},
author = {Ahamed Ashiq and Janhavi Kulkarni and Meththika Vithanage},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161906000108},
doi = {https://doi.org/10.1016/B978-0-12-816190-6.00010-8},
isbn = {978-0-12-816190-6},
year = {2019},
date = {2019-01-01},
booktitle = {Electronic Waste Management and Treatment Technology},
pages = {225 - 246},
publisher = {Butterworth-Heinemann},
abstract = {The recovery of metals from waste electrical and electronic equipment has already been highlighted as important due to the increased consumption worldwide with the advancements in “state of the art” products. Hydrometallurgical techniques used for this waste are a vital process that has resulted in active attempts to recover precious metals that can be further reutilized as a secondary resource. Significant amounts of valuable metals, specifically copper, silver, gold, nickel, and lead are being recovered that are strategically important in other processes. Hydrometallurgical processing mainly involves the use of a series of acids to leach out the metals from E-waste and further separation and purification using extraction, adsorption, and ion exchange to concentrate the precious metal. Printed circuit boards that are made up of large amounts of these precious metals have proven a promising ground for hydrometallurgical recovery. In this chapter, we present the hydrometallurgical steps taken to recover these precious metals from different components of E-waste and the latest trends in acid treatments used in the leaching process.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
The recovery of metals from waste electrical and electronic equipment has already been highlighted as important due to the increased consumption worldwide with the advancements in “state of the art” products. Hydrometallurgical techniques used for this waste are a vital process that has resulted in active attempts to recover precious metals that can be further reutilized as a secondary resource. Significant amounts of valuable metals, specifically copper, silver, gold, nickel, and lead are being recovered that are strategically important in other processes. Hydrometallurgical processing mainly involves the use of a series of acids to leach out the metals from E-waste and further separation and purification using extraction, adsorption, and ion exchange to concentrate the precious metal. Printed circuit boards that are made up of large amounts of these precious metals have proven a promising ground for hydrometallurgical recovery. In this chapter, we present the hydrometallurgical steps taken to recover these precious metals from different components of E-waste and the latest trends in acid treatments used in the leaching process.
Adassooriya, Nadeesh Madusanka; Ashiq, Ahamed; Azevedo, Luís P; Bai, Jianfeng; Bogar, Zeynep Ozsut; Borthakur, Anwesha; Capraz, Ozan; da Araújo, Fernando Gabriel S; Elia, Valerio; Espinosa, Denise C R; Ezeah, Chukwunonye; Feng, Yong; Gnoni, Maria-Grazie; Govind, Madhav; Gu, Weihua; Güngör, Aşkıner; Herat, Sunil; Kulkarni, Janhavi; Lagarinhos, Carlos Alberto F; Leung, Anna Oi Wah; Lu, Bin; Ma, En; Meidiana, Christia; Mihai, Florin-Constantin; Panikkar, Avanish K; Pathak, Pankaj; Perera, Amarasinghage Tharindu Dasun; Polat, Leyla Özgür; Rienzie, Ryan; Shih, Kaimin; Singh, Pardeep; Song, Xiaolong; Srivastava, Rajiv Ranjan; Tenório, Jorge Alberto S; Vithanage, Meththika; Wang, Shuhua; Wang, Jingwei; Wu, Wenjie; Yuan, Wenyi; Zhao, Feng; Zhang, Chenglong; Zhuang, Xuning
Contributors Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika (Ed.): Electronic Waste Management and Treatment Technology, pp. xiii - xv, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816190-6.
@incollection{ADASSOORIYA2019xiii,
title = {Contributors},
author = {Nadeesh Madusanka Adassooriya and Ahamed Ashiq and Luís P Azevedo and Jianfeng Bai and Zeynep Ozsut Bogar and Anwesha Borthakur and Ozan Capraz and Fernando Gabriel S da Araújo and Valerio Elia and Denise C R Espinosa and Chukwunonye Ezeah and Yong Feng and Maria-Grazie Gnoni and Madhav Govind and Weihua Gu and Aşkıner Güngör and Sunil Herat and Janhavi Kulkarni and Carlos Alberto F Lagarinhos and Anna Oi Wah Leung and Bin Lu and En Ma and Christia Meidiana and Florin-Constantin Mihai and Avanish K Panikkar and Pankaj Pathak and Amarasinghage Tharindu Dasun Perera and Leyla Özgür Polat and Ryan Rienzie and Kaimin Shih and Pardeep Singh and Xiaolong Song and Rajiv Ranjan Srivastava and Jorge Alberto S Tenório and Meththika Vithanage and Shuhua Wang and Jingwei Wang and Wenjie Wu and Wenyi Yuan and Feng Zhao and Chenglong Zhang and Xuning Zhuang},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161906099908},
doi = {https://doi.org/10.1016/B978-0-12-816190-6.09990-8},
isbn = {978-0-12-816190-6},
year = {2019},
date = {2019-01-01},
booktitle = {Electronic Waste Management and Treatment Technology},
pages = {xiii - xv},
publisher = {Butterworth-Heinemann},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Alkurdi, Susan S A; Herath, Indika; Bundschuh, Jochen; Al-Juboori, Raed A; Vithanage, Meththika; Mohan, Dinesh
Biochar versus bone char for a sustainable inorganic arsenic mitigation in water: What needs to be done in future research? Journal Article
In: Environment International, vol. 127, pp. 52 - 69, 2019, ISSN: 0160-4120.
@article{ALKURDI201952,
title = {Biochar versus bone char for a sustainable inorganic arsenic mitigation in water: What needs to be done in future research?},
author = {Susan S A Alkurdi and Indika Herath and Jochen Bundschuh and Raed A Al-Juboori and Meththika Vithanage and Dinesh Mohan},
url = {http://www.sciencedirect.com/science/article/pii/S016041201833085X},
doi = {https://doi.org/10.1016/j.envint.2019.03.012},
issn = {0160-4120},
year = {2019},
date = {2019-01-01},
journal = {Environment International},
volume = {127},
pages = {52 - 69},
abstract = {Arsenic (As) is an emerging contaminant on a global scale posing threat to environmental and human health. The relatively brief history of the applications of biochar and bone char has mapped the endeavors to remove As from water to a considerable extent. This critical review attempts to provide a comprehensive overview for the first time on the potential of bio- and bone-char in the immobilization of inorganic As in water. It seeks to offer a rational assessment of what is existing and what needs to be done in future research as an implication for As toxicity of human health risks through acute and chronic exposure to As contaminated water. Bio- and bone-char are recognized as promising alternatives to activated carbon due to their lower production and activation cost. The surface modification via chemical methods has been adopted to improve the adsorption capacity for anionic As species. Surface complexation, ion exchange, precipitation and electrostatic interactions are the main mechanisms involved in the adsorption of As onto the char surface. However, arsenic-bio-bone char interactions along with their chemical bonding for the removal of As in aqueous solution is still a subject of debate. Hence, the proposed mechanisms need to be scrutinized further using advanced analytical techniques such as synchrotron-based X-ray. Moving this technology from laboratory phase to field scale applications is an urgent necessity in order to establish a sustainable As mitigation in drinking water on a global scale.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Arsenic (As) is an emerging contaminant on a global scale posing threat to environmental and human health. The relatively brief history of the applications of biochar and bone char has mapped the endeavors to remove As from water to a considerable extent. This critical review attempts to provide a comprehensive overview for the first time on the potential of bio- and bone-char in the immobilization of inorganic As in water. It seeks to offer a rational assessment of what is existing and what needs to be done in future research as an implication for As toxicity of human health risks through acute and chronic exposure to As contaminated water. Bio- and bone-char are recognized as promising alternatives to activated carbon due to their lower production and activation cost. The surface modification via chemical methods has been adopted to improve the adsorption capacity for anionic As species. Surface complexation, ion exchange, precipitation and electrostatic interactions are the main mechanisms involved in the adsorption of As onto the char surface. However, arsenic-bio-bone char interactions along with their chemical bonding for the removal of As in aqueous solution is still a subject of debate. Hence, the proposed mechanisms need to be scrutinized further using advanced analytical techniques such as synchrotron-based X-ray. Moving this technology from laboratory phase to field scale applications is an urgent necessity in order to establish a sustainable As mitigation in drinking water on a global scale.
Igalavithana, Avanthi Deshani; Kwon, Eilhann E; Vithanage, Meththika; Rinklebe, Jörg; Moon, Deok Hyun; Meers, Erik; Tsang, Daniel C W; Ok, Yong Sik
Soil lead immobilization by biochars in short-term laboratory incubation studies Journal Article
In: Environment International, vol. 127, pp. 190 - 198, 2019, ISSN: 0160-4120.
@article{IGALAVITHANA2019190,
title = {Soil lead immobilization by biochars in short-term laboratory incubation studies},
author = {Avanthi Deshani Igalavithana and Eilhann E Kwon and Meththika Vithanage and Jörg Rinklebe and Deok Hyun Moon and Erik Meers and Daniel C W Tsang and Yong Sik Ok},
url = {http://www.sciencedirect.com/science/article/pii/S0160412018330022},
doi = {https://doi.org/10.1016/j.envint.2019.03.031},
issn = {0160-4120},
year = {2019},
date = {2019-01-01},
journal = {Environment International},
volume = {127},
pages = {190 - 198},
abstract = {Exchangeable lead (Pb) extracted by ammonium acetate from three independent incubation studies was assessed to understand the influence of feedstock, pyrolysis temperatures, and production conditions on Pb immobilization capacities of different biochars. Vegetable waste biochar, pine cone, wood bark, cocopeat, red pepper stalk, and palm kernel shell were used as feedstocks (food supply and agricultural wastes) to produce biochars at 200–650 °C with and without N2/CO2. Biochars were applied at 5 and 2.5% (w w−1) to a Pb contaminated (i.e., 1445 mg kg−1) agricultural soil collected near an old mine. Lead immobilization in biochar treated soils at the end of incubation period was normalized per gram of biochar applied. Biochar produced from vegetable waste at 500 °C showed the highest Pb immobilization (87%) and highest total exchangeable cations (13.5 cmol(+) kg−1) at the end of the 45 d incubation period. However, on the basis of Pb immobilization per gram of biochar, red pepper stalk biochar produced in CO2 at 650 °C was the best in Pb immobilization (0.09 mg kg−1 g−1 biochar) compared to the other biochars. The enhanced ability to immobilize Pb by biochar produced in CO2 could be due to the presence of siloxanes (SiOSi) on biochar surface. Pearson correlation analysis revealed that alkaline pH, ash%, and N% of biochars influence in Pb immobilization and exchangeable cation availability in soil. Biochar production atmosphere considerably change its properties that influence Pb immobilization. Further studies are needed on the modification of properties and Pb immobilization by biochars produced from various feedstocks in CO2.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Exchangeable lead (Pb) extracted by ammonium acetate from three independent incubation studies was assessed to understand the influence of feedstock, pyrolysis temperatures, and production conditions on Pb immobilization capacities of different biochars. Vegetable waste biochar, pine cone, wood bark, cocopeat, red pepper stalk, and palm kernel shell were used as feedstocks (food supply and agricultural wastes) to produce biochars at 200–650 °C with and without N2/CO2. Biochars were applied at 5 and 2.5% (w w−1) to a Pb contaminated (i.e., 1445 mg kg−1) agricultural soil collected near an old mine. Lead immobilization in biochar treated soils at the end of incubation period was normalized per gram of biochar applied. Biochar produced from vegetable waste at 500 °C showed the highest Pb immobilization (87%) and highest total exchangeable cations (13.5 cmol(+) kg−1) at the end of the 45 d incubation period. However, on the basis of Pb immobilization per gram of biochar, red pepper stalk biochar produced in CO2 at 650 °C was the best in Pb immobilization (0.09 mg kg−1 g−1 biochar) compared to the other biochars. The enhanced ability to immobilize Pb by biochar produced in CO2 could be due to the presence of siloxanes (SiOSi) on biochar surface. Pearson correlation analysis revealed that alkaline pH, ash%, and N% of biochars influence in Pb immobilization and exchangeable cation availability in soil. Biochar production atmosphere considerably change its properties that influence Pb immobilization. Further studies are needed on the modification of properties and Pb immobilization by biochars produced from various feedstocks in CO2.
Naveendrakumar, G; Vithanage, Meththika; Kwon, Hyun-Han; Chandrasekara, S S K; Iqbal, M C M; Pathmarajah, S; Fernando, W C D K; Obeysekera, Jayantha
South Asian perspective on temperature and rainfall extremes: A review Journal Article
In: Atmospheric Research, 2019, ISSN: 0169-8095.
@article{NAVEENDRAKUMAR2019,
title = {South Asian perspective on temperature and rainfall extremes: A review},
author = {G Naveendrakumar and Meththika Vithanage and Hyun-Han Kwon and S S K Chandrasekara and M C M Iqbal and S Pathmarajah and W C D K Fernando and Jayantha Obeysekera},
url = {http://www.sciencedirect.com/science/article/pii/S0169809518310330},
doi = {https://doi.org/10.1016/j.atmosres.2019.03.021},
issn = {0169-8095},
year = {2019},
date = {2019-01-01},
journal = {Atmospheric Research},
abstract = {Climate change has pushed the natural limits of our environment, creating extreme weather events that are more frequent and more intense in certain locations around the globe. There is evidence of increasing trends in temperature extremes in most countries of South Asia, while in a few regions, temperature extremes have been decreasing. Heatwaves have intensified, which has contributed to accelerating drought and extreme flood events in most South Asian countries. Overall changes in rainfall and temperature have led to alterations in water availability in this region. With few exceptions, the general phenomenon in most South Asian countries is that rainfall intensity has increased, but with a reduced number of wet days. Studies that associate rainfall and temperature in the region of South Asia are scarce and rainfall extremes have been studied more extensively than temperature extremes. In fact, temperature trends are spatially less coherent than rainfall trends in most south Asian countries. It is more likely correlated for the teleconnection and South Asian climate for influencing the temperature and rainfall pattern, rather than any other factors. When it comes to trend estimations, statistical slope detection metrics, such as simple linear regression, have been commonly used to detect and quantify mean trends for countries in the regions of South Asia. The application of robust nonparametric statistical tests lacks to quantify temperature and rainfall extremes, particularly in the small countries of South Asia. Statistical downscaling is recommended for better prediction accuracy as well as to find spatial coherence in trends.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Climate change has pushed the natural limits of our environment, creating extreme weather events that are more frequent and more intense in certain locations around the globe. There is evidence of increasing trends in temperature extremes in most countries of South Asia, while in a few regions, temperature extremes have been decreasing. Heatwaves have intensified, which has contributed to accelerating drought and extreme flood events in most South Asian countries. Overall changes in rainfall and temperature have led to alterations in water availability in this region. With few exceptions, the general phenomenon in most South Asian countries is that rainfall intensity has increased, but with a reduced number of wet days. Studies that associate rainfall and temperature in the region of South Asia are scarce and rainfall extremes have been studied more extensively than temperature extremes. In fact, temperature trends are spatially less coherent than rainfall trends in most south Asian countries. It is more likely correlated for the teleconnection and South Asian climate for influencing the temperature and rainfall pattern, rather than any other factors. When it comes to trend estimations, statistical slope detection metrics, such as simple linear regression, have been commonly used to detect and quantify mean trends for countries in the regions of South Asia. The application of robust nonparametric statistical tests lacks to quantify temperature and rainfall extremes, particularly in the small countries of South Asia. Statistical downscaling is recommended for better prediction accuracy as well as to find spatial coherence in trends.
Jayawardhana, Yohan; Gunatilake, Sameera R; Mahatantila, Kushani; Ginige, Maneesha P; Vithanage, Meththika
In: Journal of Environmental Management, vol. 238, pp. 323 - 330, 2019, ISSN: 0301-4797.
@article{JAYAWARDHANA2019323,
title = {Sorptive removal of toluene and m-xylene by municipal solid waste biochar: Simultaneous municipal solid waste management and remediation of volatile organic compounds},
author = {Yohan Jayawardhana and Sameera R Gunatilake and Kushani Mahatantila and Maneesha P Ginige and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/S0301479719302488},
doi = {https://doi.org/10.1016/j.jenvman.2019.02.097},
issn = {0301-4797},
year = {2019},
date = {2019-01-01},
journal = {Journal of Environmental Management},
volume = {238},
pages = {323 - 330},
abstract = {The remediation of volatile organic compounds (VOCs) from aqueous solution using Municipal solid waste biochar (MSW-BC) has been evaluated. Municipal solid waste was pyrolyzed in an onsite pyrolyzer around 450 °C with a holding time of 30 min for the production of biochar (BC). Physiochemical properties of BC were assessed based on X-Ray Fluorescence (XRF) and Fourier transform infra-red (FTIR) analysis. Adsorption capacities for the VOCs (m-xylene and toluene) were examined by batch sorption experiments. Analysis indicated high loading of m-xylene and toluene in landfill leachates from different dump sites. The FTIR analysis corroborates with the Boehm titration data whereas XRF data demonstrated negligible amounts of trace metals in MSW-BC to be a potential sorbent. Adsorption isotherm exhibited properties of both Langmuir and Freundlich which is indicative of a non-ideal monolayer adsorption process taking place. Langmuir adsorption capacities were high as 850 and 550 μg/g for toluene and m-xylene respectively. The conversion of MSW to a value added product provided a feasible means of solid waste management. The produced MSW-BC was an economical adsorbent which demonstrated a strong ability for removing VOCs. Hence, MSW-BC can be used as a landfill cover or a permeable reactive barrier material to treat MSW leachate. Thus, the conversion of MSW to BC becomes an environmentally friendly and economical means of solid waste remediation.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The remediation of volatile organic compounds (VOCs) from aqueous solution using Municipal solid waste biochar (MSW-BC) has been evaluated. Municipal solid waste was pyrolyzed in an onsite pyrolyzer around 450 °C with a holding time of 30 min for the production of biochar (BC). Physiochemical properties of BC were assessed based on X-Ray Fluorescence (XRF) and Fourier transform infra-red (FTIR) analysis. Adsorption capacities for the VOCs (m-xylene and toluene) were examined by batch sorption experiments. Analysis indicated high loading of m-xylene and toluene in landfill leachates from different dump sites. The FTIR analysis corroborates with the Boehm titration data whereas XRF data demonstrated negligible amounts of trace metals in MSW-BC to be a potential sorbent. Adsorption isotherm exhibited properties of both Langmuir and Freundlich which is indicative of a non-ideal monolayer adsorption process taking place. Langmuir adsorption capacities were high as 850 and 550 μg/g for toluene and m-xylene respectively. The conversion of MSW to a value added product provided a feasible means of solid waste management. The produced MSW-BC was an economical adsorbent which demonstrated a strong ability for removing VOCs. Hence, MSW-BC can be used as a landfill cover or a permeable reactive barrier material to treat MSW leachate. Thus, the conversion of MSW to BC becomes an environmentally friendly and economical means of solid waste remediation.
Rienzie, Ryan; Perera, Amarasinghage Tharindu Dasun; Adassooriya, Nadeesh Madusanka
Chapter 6 - Biorecovery of Precious Metal Nanoparticles From Waste Electrical and Electronic Equipments Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika (Ed.): Electronic Waste Management and Treatment Technology, pp. 133 - 152, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816190-6.
@incollection{RIENZIE2019133,
title = {Chapter 6 - Biorecovery of Precious Metal Nanoparticles From Waste Electrical and Electronic Equipments},
author = {Ryan Rienzie and Amarasinghage Tharindu Dasun Perera and Nadeesh Madusanka Adassooriya},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161906000066},
doi = {https://doi.org/10.1016/B978-0-12-816190-6.00006-6},
isbn = {978-0-12-816190-6},
year = {2019},
date = {2019-01-01},
booktitle = {Electronic Waste Management and Treatment Technology},
pages = {133 - 152},
publisher = {Butterworth-Heinemann},
abstract = {The accelerating rate of accumulation of electronic waste or waste electrical and electronic equipment (WEEE) is a global problem due to the environmental and health consequences. Recycling of WEEE is a sustainable solution to overcome this problem. Use of WEEE as a secondary ore to extract precious metals and metal nanoparticles is widely practiced in recycling systems. The wider array of applications of precious metals and metal nanoparticles and greener production means has increased the demand from industry. The use of microorganisms has been identified as a greener method for recycling WEEE and extracting metals and their nanoparticles. Furthermore, the ability of such microorganisms to produce nanoparticles using their biological mechanisms is a major advantage. This chapter discusses the extraction of metals and metal nanoparticles as a value-added product of microorganism-mediated WEEE recycling processes, their advantages and disadvantages compared to conventional methods, and potential applications.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
The accelerating rate of accumulation of electronic waste or waste electrical and electronic equipment (WEEE) is a global problem due to the environmental and health consequences. Recycling of WEEE is a sustainable solution to overcome this problem. Use of WEEE as a secondary ore to extract precious metals and metal nanoparticles is widely practiced in recycling systems. The wider array of applications of precious metals and metal nanoparticles and greener production means has increased the demand from industry. The use of microorganisms has been identified as a greener method for recycling WEEE and extracting metals and their nanoparticles. Furthermore, the ability of such microorganisms to produce nanoparticles using their biological mechanisms is a major advantage. This chapter discusses the extraction of metals and metal nanoparticles as a value-added product of microorganism-mediated WEEE recycling processes, their advantages and disadvantages compared to conventional methods, and potential applications.
Rohanachandra, Yasodha Maheshi; Vipulanandan, Santhrasulochana
A case of an unusual presentation of Obsessive Compulsive Disorder in an adolescent Journal Article
In: Asian Journal of Psychiatry, 2019, ISSN: 1876-2018.
@article{ROHANACHANDRA2019,
title = {A case of an unusual presentation of Obsessive Compulsive Disorder in an adolescent},
author = {Yasodha Maheshi Rohanachandra and Santhrasulochana Vipulanandan},
url = {http://www.sciencedirect.com/science/article/pii/S1876201819301807},
doi = {https://doi.org/10.1016/j.ajp.2019.05.008},
issn = {1876-2018},
year = {2019},
date = {2019-01-01},
journal = {Asian Journal of Psychiatry},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Manage, Pathmalal M; Liyanage, Gayani Yasodara
18 - Antibiotics induced antibacterial resistance Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika; Kapley, Atya (Ed.): Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology, pp. 429 - 448, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816189-0.
@incollection{MANAGE2019429,
title = {18 - Antibiotics induced antibacterial resistance},
author = {Pathmalal M Manage and Gayani Yasodara Liyanage},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage and Atya Kapley},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161890000184},
doi = {https://doi.org/10.1016/B978-0-12-816189-0.00018-4},
isbn = {978-0-12-816189-0},
year = {2019},
date = {2019-01-01},
booktitle = {Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology},
pages = {429 - 448},
publisher = {Butterworth-Heinemann},
abstract = {The rapid emergence of resistant bacteria is occurring worldwide and endangering the efficacy of antibiotics. Overuse and misuse of antibiotics in clinical context are widely regarded as major pathways to enter antibiotic residues to hospital effluent and promoting bacterial resistance against antibiotic. Thus improper disposal and misuse of antibiotics, in human therapy, farm animal husbandry, and aquaculture may influence on the development of multidrug-resistant bacteria in the environment through the accumulation of resistance plasmids, transposons of genes, or by the action of multidrug efflux pumps. Those antibiotic-resistant bacteria may act as reservoir of antibiotic resistance genes for other bacteria. Thus, in future, antibacterial resistance will be resulted in failure of bacterial response to standard antibiotic treatment which leads to prolonged illness, an immense risk of death, and production losses at agricultural farms through; natural (intrinsic) resistance, acquired resistance, cross resistance, and multidrug resistance following five mechanisms of destructive enzymes, modifying antibacterial targets, efflux, reducing permeability, and creating alternative metabolic pathways.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
The rapid emergence of resistant bacteria is occurring worldwide and endangering the efficacy of antibiotics. Overuse and misuse of antibiotics in clinical context are widely regarded as major pathways to enter antibiotic residues to hospital effluent and promoting bacterial resistance against antibiotic. Thus improper disposal and misuse of antibiotics, in human therapy, farm animal husbandry, and aquaculture may influence on the development of multidrug-resistant bacteria in the environment through the accumulation of resistance plasmids, transposons of genes, or by the action of multidrug efflux pumps. Those antibiotic-resistant bacteria may act as reservoir of antibiotic resistance genes for other bacteria. Thus, in future, antibacterial resistance will be resulted in failure of bacterial response to standard antibiotic treatment which leads to prolonged illness, an immense risk of death, and production losses at agricultural farms through; natural (intrinsic) resistance, acquired resistance, cross resistance, and multidrug resistance following five mechanisms of destructive enzymes, modifying antibacterial targets, efflux, reducing permeability, and creating alternative metabolic pathways.
Mendis, M S; Halwatura, R U; Somadeva, D R K; Jayasinghe, R A; Gunawardana, M
Influence of timber grain distribution on orientation of saw cuts during application; Reference to Heritage structures in Sri Lanka Journal Article
In: Case Studies in Construction Materials, pp. e00237, 2019, ISSN: 2214-5095.
@article{MENDIS2019e00237,
title = {Influence of timber grain distribution on orientation of saw cuts during application; Reference to Heritage structures in Sri Lanka},
author = {M S Mendis and R U Halwatura and D R K Somadeva and R A Jayasinghe and M Gunawardana},
url = {http://www.sciencedirect.com/science/article/pii/S2214509518303942},
doi = {https://doi.org/10.1016/j.cscm.2019.e00237},
issn = {2214-5095},
year = {2019},
date = {2019-01-01},
journal = {Case Studies in Construction Materials},
pages = {e00237},
abstract = {Longitudinal arrangement of wood fibers is known as wood grains. It is one of the most important physical aspects of timber in applications. The properties differ along the grain and against the grain. Straight grains run parallel to the longitudinal axis of the wood. Meanwhile the cross grain deviates from the longitudinal axis as spiral and diagonal grains. This orientation has a high influence on the wood and affects physical properties during application. In order to study this, a detailed analysis was performed on Ambalam structures; a cherished heritage structure originated from the vernacular architecture in Sri Lanka. These structures are existing living proofs of vibrant construction materials in an exposed environment built with in unrevealed traditional construction technologies practiced by our ancestors. Badulla Ambalama, Padivitiya Ambalama, Panavitiya Ambalama, Karagahagedra Ambalama, Giruwa Ambalama and Rukula Ambalama were selected as case studies for this research. The grain distribution of the exposed surfaces on the structural components were mapped using AutoCAD software. The results of mapping and overlapping the grain distribution of the specific timber assisted to generate clues on the size of the tree and to determine the orientation of the saw pattern from the wood log. The generated grain maps revealed the sensitivity and the adequate knowledge in material manipulation utilized for specific structural components respect to its load distribution by our ancestors. The Ambalam heritage structures in Sri Lanka have enlighten timber as an acceptable construction material with a respectable service life for tropical countries.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Longitudinal arrangement of wood fibers is known as wood grains. It is one of the most important physical aspects of timber in applications. The properties differ along the grain and against the grain. Straight grains run parallel to the longitudinal axis of the wood. Meanwhile the cross grain deviates from the longitudinal axis as spiral and diagonal grains. This orientation has a high influence on the wood and affects physical properties during application. In order to study this, a detailed analysis was performed on Ambalam structures; a cherished heritage structure originated from the vernacular architecture in Sri Lanka. These structures are existing living proofs of vibrant construction materials in an exposed environment built with in unrevealed traditional construction technologies practiced by our ancestors. Badulla Ambalama, Padivitiya Ambalama, Panavitiya Ambalama, Karagahagedra Ambalama, Giruwa Ambalama and Rukula Ambalama were selected as case studies for this research. The grain distribution of the exposed surfaces on the structural components were mapped using AutoCAD software. The results of mapping and overlapping the grain distribution of the specific timber assisted to generate clues on the size of the tree and to determine the orientation of the saw pattern from the wood log. The generated grain maps revealed the sensitivity and the adequate knowledge in material manipulation utilized for specific structural components respect to its load distribution by our ancestors. The Ambalam heritage structures in Sri Lanka have enlighten timber as an acceptable construction material with a respectable service life for tropical countries.
Jayampathi, Tharuka; Atugoda, Thilakshani; Jayasinghe, Chamila
4 - Uptake and accumulation of pharmaceuticals and personal care products in leafy vegetables Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika; Kapley, Atya (Ed.): Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology, pp. 87 - 113, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816189-0.
@incollection{JAYAMPATHI201987,
title = {4 - Uptake and accumulation of pharmaceuticals and personal care products in leafy vegetables},
author = {Tharuka Jayampathi and Thilakshani Atugoda and Chamila Jayasinghe},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage and Atya Kapley},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161890000044},
doi = {https://doi.org/10.1016/B978-0-12-816189-0.00004-4},
isbn = {978-0-12-816189-0},
year = {2019},
date = {2019-01-01},
booktitle = {Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology},
pages = {87 - 113},
publisher = {Butterworth-Heinemann},
abstract = {Application of biosolids from the treatment of sewage sludge and usage of reclaimed water for irrigation of agricultural land gives rise to contamination of groundwater by pharmaceuticals and personal care products (PPCPs) which increases the likelihood of unintentional human exposure through food crops which are consumed fresh such as leafy vegetables (LFs). The uptake of pharmaceuticals into LF is affected by factors such as soil organic matter, soil pH, source of PPCPs, chemical hydrophobicity and molecular ionization of chemical compound, plant lipid content, metabolic systems, growth and transpiration rates of plants. The concentrations of PPCPs are highest in roots when compared to stems and leaves; however, they vary between plant species and PPCPs due to differences in translocation and bioconcentration factors. Research demonstrates that human risk from dietary intake of individual PPCPs through consumption of LF is negligible; however, further research is required as these compounds maybe present as mixtures and affect hyposensitive populations differently.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Application of biosolids from the treatment of sewage sludge and usage of reclaimed water for irrigation of agricultural land gives rise to contamination of groundwater by pharmaceuticals and personal care products (PPCPs) which increases the likelihood of unintentional human exposure through food crops which are consumed fresh such as leafy vegetables (LFs). The uptake of pharmaceuticals into LF is affected by factors such as soil organic matter, soil pH, source of PPCPs, chemical hydrophobicity and molecular ionization of chemical compound, plant lipid content, metabolic systems, growth and transpiration rates of plants. The concentrations of PPCPs are highest in roots when compared to stems and leaves; however, they vary between plant species and PPCPs due to differences in translocation and bioconcentration factors. Research demonstrates that human risk from dietary intake of individual PPCPs through consumption of LF is negligible; however, further research is required as these compounds maybe present as mixtures and affect hyposensitive populations differently.
Rajapaksha, Anushka Upamali; Premarathna, Kadupitige Shashikala Dilrukshi; Gunarathne, Viraj; Ahmed, Aashiq; Vithanage, Meththika
9 - Sorptive removal of pharmaceutical and personal care products from water and wastewater Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika; Kapley, Atya (Ed.): Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology, pp. 213 - 238, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816189-0.
@incollection{RAJAPAKSHA2019213,
title = {9 - Sorptive removal of pharmaceutical and personal care products from water and wastewater},
author = {Anushka Upamali Rajapaksha and Kadupitige Shashikala Dilrukshi Premarathna and Viraj Gunarathne and Aashiq Ahmed and Meththika Vithanage},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage and Atya Kapley},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161890000093},
doi = {https://doi.org/10.1016/B978-0-12-816189-0.00009-3},
isbn = {978-0-12-816189-0},
year = {2019},
date = {2019-01-01},
booktitle = {Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology},
pages = {213 - 238},
publisher = {Butterworth-Heinemann},
abstract = {Environmental contamination by pharmaceutical and personal care products (PPCPs) is a worldwide concern. Although reported concentrations are generally low, a large numbers of PPCPs with diverse chemical natures have been detected in soil, water, and aquatic environments, and most of them can persist in the environment for long time posing detrimental effects on human health, biota, or other significant environment aspects. Several techniques such as bioremediation, ozonation, electrochemical separation technologies, and physicochemical treatments including coagulation, volatilization, sorption, sedimentation have been used to remediate PPCPs contaminated sites. This chapter provides a comprehensive overview of sorptive removal techniques of PPCPs and the mechanism of interaction. Until now, various sorbents including activated carbon, biochar, agricultural solid waste, industrial by-products, natural clay minerals, and biosorbents have been examined to remove PPCPs in water and wastewater. The diverse chemical nature and specific properties of PPCPs make the sorption process more complex in the natural environment. Hence, research interest needs to be focused on novel sorbents which are suitable for natural environment conditions. Moreover, specific properties of water/wastewater such as pH, ionic strength, other contaminants, and temperature should be considered for the selection of proper sorbent.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Environmental contamination by pharmaceutical and personal care products (PPCPs) is a worldwide concern. Although reported concentrations are generally low, a large numbers of PPCPs with diverse chemical natures have been detected in soil, water, and aquatic environments, and most of them can persist in the environment for long time posing detrimental effects on human health, biota, or other significant environment aspects. Several techniques such as bioremediation, ozonation, electrochemical separation technologies, and physicochemical treatments including coagulation, volatilization, sorption, sedimentation have been used to remediate PPCPs contaminated sites. This chapter provides a comprehensive overview of sorptive removal techniques of PPCPs and the mechanism of interaction. Until now, various sorbents including activated carbon, biochar, agricultural solid waste, industrial by-products, natural clay minerals, and biosorbents have been examined to remove PPCPs in water and wastewater. The diverse chemical nature and specific properties of PPCPs make the sorption process more complex in the natural environment. Hence, research interest needs to be focused on novel sorbents which are suitable for natural environment conditions. Moreover, specific properties of water/wastewater such as pH, ionic strength, other contaminants, and temperature should be considered for the selection of proper sorbent.
Adassooriya, Nadeesh M; Ahmed, Aashiq; Atugoda, Thilakshani; Bano, Farhat; Bansiwal, Amit Kumar; Dafale, Nishant A; Dey, Saptarshi; Dhir, Bhupinder; Dhodapkar, Rita S; Premarathna, Kadupitige Shashikala Dilrukshi; Ding, Tao; Domínguez, Delfina C; Gandhi, Kavita N; Gautam, Kamini; Gałwa-Widera, Monika; Gunarathne, Viraj; Hippargi, Girivyankatesh; Jadeja, Niti B; Jamil, Kaiser; Jayampathi, Tharuka; Jayasinghe, Chamila; Kalia, Vipin Chandra; Kamble, Sanjay P; Kapley, Atya; Kaur, Harkirat; Kwarciak-Kozłowska, Anna; Liyanage, Gayani Yasodara; Malik, Anushree; Manage, Pathmalal M; Meza-Rodriguez, Samantha M; Morone, Amruta; Mulay, Prajakatta; Phale, Prashant S; Prasad, Majeti Narasimha Vara; Pophali, Girish R; Purohit, Hemant J; Rajapaksha, Anushka Upamali; Ramanayaka, Sammani; Rienzie, Ryan; Sharma, Amrita; Shen, Jialing; Vithanage, Meththika; Yadav, Shailendra; Zhang, Dong; Zhang, Ming
List of contributors Book Section
In: Prasad, Majeti Narasimha Vara; Vithanage, Meththika; Kapley, Atya (Ed.): Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology, pp. xv - xviii, Butterworth-Heinemann, 2019, ISBN: 978-0-12-816189-0.
@incollection{ADASSOORIYA2019xv,
title = {List of contributors},
author = {Nadeesh M Adassooriya and Aashiq Ahmed and Thilakshani Atugoda and Farhat Bano and Amit Kumar Bansiwal and Nishant A Dafale and Saptarshi Dey and Bhupinder Dhir and Rita S Dhodapkar and Kadupitige Shashikala Dilrukshi Premarathna and Tao Ding and Delfina C Domínguez and Kavita N Gandhi and Kamini Gautam and Monika Gałwa-Widera and Viraj Gunarathne and Girivyankatesh Hippargi and Niti B Jadeja and Kaiser Jamil and Tharuka Jayampathi and Chamila Jayasinghe and Vipin Chandra Kalia and Sanjay P Kamble and Atya Kapley and Harkirat Kaur and Anna Kwarciak-Kozłowska and Gayani Yasodara Liyanage and Anushree Malik and Pathmalal M Manage and Samantha M Meza-Rodriguez and Amruta Morone and Prajakatta Mulay and Prashant S Phale and Majeti Narasimha Vara Prasad and Girish R Pophali and Hemant J Purohit and Anushka Upamali Rajapaksha and Sammani Ramanayaka and Ryan Rienzie and Amrita Sharma and Jialing Shen and Meththika Vithanage and Shailendra Yadav and Dong Zhang and Ming Zhang},
editor = {Majeti Narasimha Vara Prasad and Meththika Vithanage and Atya Kapley},
url = {http://www.sciencedirect.com/science/article/pii/B9780128161890000226},
doi = {https://doi.org/10.1016/B978-0-12-816189-0.00022-6},
isbn = {978-0-12-816189-0},
year = {2019},
date = {2019-01-01},
booktitle = {Pharmaceuticals and Personal Care Products: Waste Management and Treatment Technology},
pages = {xv - xviii},
publisher = {Butterworth-Heinemann},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Kim, Youkwan; Oh, Jeong-Ik; Vithanage, Meththika; Park, Young-Kwon; Lee, Jechan; Kwon, Eilhann E
Modification of biochar properties using CO2 Journal Article
In: Chemical Engineering Journal, vol. 372, pp. 383 - 389, 2019, ISSN: 1385-8947.
@article{KIM2019383,
title = {Modification of biochar properties using CO2},
author = {Youkwan Kim and Jeong-Ik Oh and Meththika Vithanage and Young-Kwon Park and Jechan Lee and Eilhann E Kwon},
url = {http://www.sciencedirect.com/science/article/pii/S1385894719309568},
doi = {https://doi.org/10.1016/j.cej.2019.04.170},
issn = {1385-8947},
year = {2019},
date = {2019-01-01},
journal = {Chemical Engineering Journal},
volume = {372},
pages = {383 - 389},
abstract = {Biochar is widely used for various environmental remediation strategies such as soil amendment because of its intrinsic carbon negativity and porosity. Biochar is a charcoal-like material produced via pyrolysis of biomass. To determine an effective method for modification of the porosity and morphology of biochar and establishment of a more sustainable pyrolysis platform for biomass valorization, this study used CO2 as a reactive gas medium in the biomass pyrolysis process. This study placed emphasis on elucidating the role of CO2 in the production of biochar from different types of biomass, such as cellulose, xylan, lignin, grass, and oak wood. The surface area and porosity of biochar were strongly related to the type of biomass. Under comparable pyrolysis conditions, the surface area of biochar decreased in the following order: cellulose > xylan > lignin ∼ oak wood > grass. The use of CO2 as the gas medium in biomass pyrolysis affected the surface area and porosity of biochar samples derived from biomass feedstock. For instance, the surface area and total pore volume of the oak-wood-derived biochar produced in the CO2 environment were twice those produced in the N2 environment. Given that the increases in the biochar surface area and porosity were attributed to the enhanced release of volatile organic compounds (VOCs) from biomass, CO2 may have enhanced VOC release (removal) during pyrolysis. Therefore, the use of CO2 in a pyrolysis platform is expected to be a strategic approach for biomass valorization.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Biochar is widely used for various environmental remediation strategies such as soil amendment because of its intrinsic carbon negativity and porosity. Biochar is a charcoal-like material produced via pyrolysis of biomass. To determine an effective method for modification of the porosity and morphology of biochar and establishment of a more sustainable pyrolysis platform for biomass valorization, this study used CO2 as a reactive gas medium in the biomass pyrolysis process. This study placed emphasis on elucidating the role of CO2 in the production of biochar from different types of biomass, such as cellulose, xylan, lignin, grass, and oak wood. The surface area and porosity of biochar were strongly related to the type of biomass. Under comparable pyrolysis conditions, the surface area of biochar decreased in the following order: cellulose > xylan > lignin ∼ oak wood > grass. The use of CO2 as the gas medium in biomass pyrolysis affected the surface area and porosity of biochar samples derived from biomass feedstock. For instance, the surface area and total pore volume of the oak-wood-derived biochar produced in the CO2 environment were twice those produced in the N2 environment. Given that the increases in the biochar surface area and porosity were attributed to the enhanced release of volatile organic compounds (VOCs) from biomass, CO2 may have enhanced VOC release (removal) during pyrolysis. Therefore, the use of CO2 in a pyrolysis platform is expected to be a strategic approach for biomass valorization.
Premarathna, K S D; Rajapaksha, Anushka Upamali; Sarkar, Binoy; Kwon, Eilhann E; Bhatnagar, Amit; Ok, Yong Sik; Vithanage, Meththika
Biochar-based engineered composites for sorptive decontamination of water: A review Journal Article
In: Chemical Engineering Journal, vol. 372, pp. 536 - 550, 2019, ISSN: 1385-8947.
@article{PREMARATHNA2019536,
title = {Biochar-based engineered composites for sorptive decontamination of water: A review},
author = {K S D Premarathna and Anushka Upamali Rajapaksha and Binoy Sarkar and Eilhann E Kwon and Amit Bhatnagar and Yong Sik Ok and Meththika Vithanage},
url = {http://www.sciencedirect.com/science/article/pii/S1385894719308757},
doi = {https://doi.org/10.1016/j.cej.2019.04.097},
issn = {1385-8947},
year = {2019},
date = {2019-01-01},
journal = {Chemical Engineering Journal},
volume = {372},
pages = {536 - 550},
abstract = {Biochar (BC) exhibits a great potential as an adsorbent in decontamination of water. To improve the adsorption capabilities and impart the particular functionalities of BC, various methods (chemical modification, physical modification, impregnation with different materials, and magnetic modification) have been developed. As compared to surface modifications, BC-based composites provide various technical and environmental benefits because they require fewer chemicals, lesser energy, and confer enhanced contaminant removal capacity. Therefore, this review focuses on BC composites prepared by the combination of BC with different additives including metals, metal oxides, clay minerals, and carbonaceous materials, which greatly alter the physicochemical properties of BC and broaden its adsorption potential for a wide range of aquatic contaminants. Techniques for the preparation of BC composites, their adsorption potentials for a variety of inorganic and organic environmental contaminants, factors affecting BC properties and the adsorption process, and the mechanisms involved in adsorption are also discussed. Modification typically alters the surface properties and functionalities of BC composites including surface area, pore volume, pore size, surface charge, and surface functional groups. Hence, modification enhances the adsorption capacity of BC for most organic and inorganic compounds and ions. Nevertheless, some modifications negatively affect the adsorption of certain contaminants because of various factors including obstruction of pores due to over coating and development of same charge as contaminant on the surface of BC. However, the use of BC composites in environmental remediation is still in its infancy, and further research and development is needed to reach scalability and commercialization of the new technology.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Biochar (BC) exhibits a great potential as an adsorbent in decontamination of water. To improve the adsorption capabilities and impart the particular functionalities of BC, various methods (chemical modification, physical modification, impregnation with different materials, and magnetic modification) have been developed. As compared to surface modifications, BC-based composites provide various technical and environmental benefits because they require fewer chemicals, lesser energy, and confer enhanced contaminant removal capacity. Therefore, this review focuses on BC composites prepared by the combination of BC with different additives including metals, metal oxides, clay minerals, and carbonaceous materials, which greatly alter the physicochemical properties of BC and broaden its adsorption potential for a wide range of aquatic contaminants. Techniques for the preparation of BC composites, their adsorption potentials for a variety of inorganic and organic environmental contaminants, factors affecting BC properties and the adsorption process, and the mechanisms involved in adsorption are also discussed. Modification typically alters the surface properties and functionalities of BC composites including surface area, pore volume, pore size, surface charge, and surface functional groups. Hence, modification enhances the adsorption capacity of BC for most organic and inorganic compounds and ions. Nevertheless, some modifications negatively affect the adsorption of certain contaminants because of various factors including obstruction of pores due to over coating and development of same charge as contaminant on the surface of BC. However, the use of BC composites in environmental remediation is still in its infancy, and further research and development is needed to reach scalability and commercialization of the new technology.
Sarkar, Binoy; Mandal, Sanchita; Tsang, Yiu Fai; Vithanage, Meththika; Biswas, Jayanta Kumar; Yi, Haakrho; Dou, Xiaomin; Ok, Yong Sik
24 - Sustainable sludge management by removing emerging contaminants from urban wastewater using carbon nanotubes Book Section
In: Prasad, Majeti Narasimha Vara; de Favas, Paulo Jorge Campos; Vithanage, Meththika; Mohan, Venkata S (Ed.): Industrial and Municipal Sludge, pp. 553 - 571, Butterworth-Heinemann, 2019, ISBN: 978-0-12-815907-1.
@incollection{SARKAR2019553,
title = {24 - Sustainable sludge management by removing emerging contaminants from urban wastewater using carbon nanotubes},
author = {Binoy Sarkar and Sanchita Mandal and Yiu Fai Tsang and Meththika Vithanage and Jayanta Kumar Biswas and Haakrho Yi and Xiaomin Dou and Yong Sik Ok},
editor = {Majeti Narasimha Vara Prasad and Paulo Jorge Campos de Favas and Meththika Vithanage and Venkata S Mohan},
url = {http://www.sciencedirect.com/science/article/pii/B9780128159071000246},
doi = {https://doi.org/10.1016/B978-0-12-815907-1.00024-6},
isbn = {978-0-12-815907-1},
year = {2019},
date = {2019-01-01},
booktitle = {Industrial and Municipal Sludge},
pages = {553 - 571},
publisher = {Butterworth-Heinemann},
abstract = {The presence of emerging contaminants, including pharmaceuticals and personal care products (PPCPs), pesticides, and endocrine-disrupting chemicals (EDCs), in water bodies is a serious problem in many countries. However, the environmental fate of emerging contaminants and their behavior is largely unknown. Urban wastewater is a predominant source of contaminants of emerging concern (CECs) globally. Conventional wastewater treatment processes are not designed to remove these compounds, and they simultaneously produce a huge amount of contaminated sludge. Advanced wastewater treatment technologies, such as membrane filtration, ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), ozone and catalytic oxidation, and membrane bioreactors (MBRs), could partially remove some CECs, but the high cost is a problem with their application. This chapter discusses the scope of novel materials based on carbon nanotubes (CNTs) and technologies in removing CECs from urban wastewater that potentially results in a sustainable sludge management practice in the water supply chain.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
The presence of emerging contaminants, including pharmaceuticals and personal care products (PPCPs), pesticides, and endocrine-disrupting chemicals (EDCs), in water bodies is a serious problem in many countries. However, the environmental fate of emerging contaminants and their behavior is largely unknown. Urban wastewater is a predominant source of contaminants of emerging concern (CECs) globally. Conventional wastewater treatment processes are not designed to remove these compounds, and they simultaneously produce a huge amount of contaminated sludge. Advanced wastewater treatment technologies, such as membrane filtration, ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), ozone and catalytic oxidation, and membrane bioreactors (MBRs), could partially remove some CECs, but the high cost is a problem with their application. This chapter discusses the scope of novel materials based on carbon nanotubes (CNTs) and technologies in removing CECs from urban wastewater that potentially results in a sustainable sludge management practice in the water supply chain.
Antoniadis, Vasileios; Shaheen, Sabry M; Levizou, Efi; Shahid, Muhammad; Niazi, Nabeel Khan; Vithanage, Meththika; Ok, Yong Sik; Bolan, Nanthi; Rinklebe, Jörg
In: Environment International, vol. 127, pp. 819 - 847, 2019, ISSN: 0160-4120.
@article{ANTONIADIS2019819,
title = {A critical prospective analysis of the potential toxicity of trace element regulation limits in soils worldwide: Are they protective concerning health risk assessment? - A review},
author = {Vasileios Antoniadis and Sabry M Shaheen and Efi Levizou and Muhammad Shahid and Nabeel Khan Niazi and Meththika Vithanage and Yong Sik Ok and Nanthi Bolan and Jörg Rinklebe},
url = {http://www.sciencedirect.com/science/article/pii/S0160412018328381},
doi = {https://doi.org/10.1016/j.envint.2019.03.039},
issn = {0160-4120},
year = {2019},
date = {2019-01-01},
journal = {Environment International},
volume = {127},
pages = {819 - 847},
abstract = {Trace elements (TEs) may have toxic effects to plants and humans; thus, countries and organizations impose maximum allowable regulation limits of their concentrations in soils. Usually such limits are placed in different categories according to soil use, soil properties or based on both attributes. However, some countries have regulation limits irrespective of differentiation in soil properties. In this review, we aimed at collecting TE regulation limits in soils from major countries and organizations around the globe, and critiquing them by assessing potential human health risks in the case of soils attaining the maximum allowable values. We explored the soil-to-human pathway and differentiated among three major exposures from TEs, i.e., residential, industrial and agricultural. We observed the existence of problems concerning TE regulation limits, among which the fact that limits across countries do not regulate the same TEs, not even a minimum number of TEs. This indicates that countries do not seem to agree on which regulation limits of TEs pose a high risk. Also, these regulation limits do not take into account TE mobility to neighbouring environment interphases such as plant, especially edible, and water matrices. Moreover, limits for same TEs are vastly diverse across countries; this indicates that those countries have conflicting information concerning TE-related health risks. Subsequently, we addressed this problem of diversity by quantifying resultant risks; we did that by calculating human health risk indices, taking into consideration the cases in which the highest allowable TE limits are attained in soil. Arsenic limits were found to generate a relatively high hazard quotient (HQi, accounting for human intake over the maximum allowable oral reference dose for that same TE), indicating that its risk tends to be underestimated. Other TE limits, such as those of Cd, Cu, Ni, Pb, and Zn typically result in low HQi, meaning that limits in their cases are rather overprotective. Our approach reveals the need of reducing diversity in regulation limits by drafting soil legislations of worldwide validity, since risks are common across countries. We suggest that new directions should strategically tend to (a) reduce limits of TEs with underestimated contribution to health risk (such as As), (b) cautiously increase limits of TEs that currently cause minor health risks, (c) quantify TE risks associated with uptake to edible plants and potable water, and (d) consider multi-element contamination cases, where risks are cumulatively enhanced due to TE synergism.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Trace elements (TEs) may have toxic effects to plants and humans; thus, countries and organizations impose maximum allowable regulation limits of their concentrations in soils. Usually such limits are placed in different categories according to soil use, soil properties or based on both attributes. However, some countries have regulation limits irrespective of differentiation in soil properties. In this review, we aimed at collecting TE regulation limits in soils from major countries and organizations around the globe, and critiquing them by assessing potential human health risks in the case of soils attaining the maximum allowable values. We explored the soil-to-human pathway and differentiated among three major exposures from TEs, i.e., residential, industrial and agricultural. We observed the existence of problems concerning TE regulation limits, among which the fact that limits across countries do not regulate the same TEs, not even a minimum number of TEs. This indicates that countries do not seem to agree on which regulation limits of TEs pose a high risk. Also, these regulation limits do not take into account TE mobility to neighbouring environment interphases such as plant, especially edible, and water matrices. Moreover, limits for same TEs are vastly diverse across countries; this indicates that those countries have conflicting information concerning TE-related health risks. Subsequently, we addressed this problem of diversity by quantifying resultant risks; we did that by calculating human health risk indices, taking into consideration the cases in which the highest allowable TE limits are attained in soil. Arsenic limits were found to generate a relatively high hazard quotient (HQi, accounting for human intake over the maximum allowable oral reference dose for that same TE), indicating that its risk tends to be underestimated. Other TE limits, such as those of Cd, Cu, Ni, Pb, and Zn typically result in low HQi, meaning that limits in their cases are rather overprotective. Our approach reveals the need of reducing diversity in regulation limits by drafting soil legislations of worldwide validity, since risks are common across countries. We suggest that new directions should strategically tend to (a) reduce limits of TEs with underestimated contribution to health risk (such as As), (b) cautiously increase limits of TEs that currently cause minor health risks, (c) quantify TE risks associated with uptake to edible plants and potable water, and (d) consider multi-element contamination cases, where risks are cumulatively enhanced due to TE synergism.
Amulya, Kotamraju; Ayol, Azize; Bai, Jianfeng; Bhat, Sartaj Ahmad; Biswas, Jayanta Kumar; Bustamante, Karla Liliana Tarango; Campbell, John; Canziani, Roberto; Celary, Piotr; Chakraborty, Debkumar; Chen, Diyun; Courtois, Pauline; Czerwińska, Karolina; Dahiya, Shikha; Dong, Bin; Dou, Xiaomin; Dudziak, Mariusz; Fijalkowski, Krzysztof; Grifoni, Martina; Grobelak, Anna; Grosser, Anna; Gu, Weihua; Jaskulak, Marta; Kacprzak, Małgorzata; Kamizela, Tomasz; Katakojwala, Ranaprathap; Kokot, Paulina; Kong, Lingjun; Kowalczyk, Mariusz; Kwarciak-Kozłowska, Anna; Lemiere, Sébastien; Liao, Changzhong; Mandal, Sanchita; Matichenkov, Vladimir; Murtaś, Aneta; Kumar, Naresh A; Neczaj, Ewa; Nikhil, Gauravarapu Navlur; Ok, Yong Sik; Pedron, Francesca; Petruzzelli, Gianniantonio; Prasad, Majeti Narasimha Vara; Rorat, Agnieszka; Rosellini, Irene; Rosińska, Agata; Sarkar, Binoy; Sarma, Hemen; Shih, Kaimin; Smol, Marzena; Sobik-Szołtysek, Jolanta; Spinosa, Ludovico; Srivastav, Venu; Su, Minhua; Tang, Yuanyuan; Tsang, Yiu Fai; Vandenbulcke, Franck; Mohan, Venkata S; Vig, Adarsh Pal; Vithanage, Meththika; Wang, Jingwei; Werle, Sebastian; Wiśniowska, Ewa; Worwag, Małgorzata; Wu, Pengfei; Wystalska, Katarzyna; Yi, Haakrho; Yuan, Wenyi; Zawieja, Iwona; Zhang, Chenglong
Contributors Book Section
In: Prasad, Majeti Narasimha Vara; de Favas, Paulo Jorge Campos; Vithanage, Meththika; Mohan, Venkata S (Ed.): Industrial and Municipal Sludge, pp. xv - xix, Butterworth-Heinemann, 2019, ISBN: 978-0-12-815907-1.
@incollection{AMULYA2019xv,
title = {Contributors},
author = {Kotamraju Amulya and Azize Ayol and Jianfeng Bai and Sartaj Ahmad Bhat and Jayanta Kumar Biswas and Karla Liliana Tarango Bustamante and John Campbell and Roberto Canziani and Piotr Celary and Debkumar Chakraborty and Diyun Chen and Pauline Courtois and Karolina Czerwińska and Shikha Dahiya and Bin Dong and Xiaomin Dou and Mariusz Dudziak and Krzysztof Fijalkowski and Martina Grifoni and Anna Grobelak and Anna Grosser and Weihua Gu and Marta Jaskulak and Małgorzata Kacprzak and Tomasz Kamizela and Ranaprathap Katakojwala and Paulina Kokot and Lingjun Kong and Mariusz Kowalczyk and Anna Kwarciak-Kozłowska and Sébastien Lemiere and Changzhong Liao and Sanchita Mandal and Vladimir Matichenkov and Aneta Murtaś and Naresh A Kumar and Ewa Neczaj and Gauravarapu Navlur Nikhil and Yong Sik Ok and Francesca Pedron and Gianniantonio Petruzzelli and Majeti Narasimha Vara Prasad and Agnieszka Rorat and Irene Rosellini and Agata Rosińska and Binoy Sarkar and Hemen Sarma and Kaimin Shih and Marzena Smol and Jolanta Sobik-Szołtysek and Ludovico Spinosa and Venu Srivastav and Minhua Su and Yuanyuan Tang and Yiu Fai Tsang and Franck Vandenbulcke and Venkata S Mohan and Adarsh Pal Vig and Meththika Vithanage and Jingwei Wang and Sebastian Werle and Ewa Wiśniowska and Małgorzata Worwag and Pengfei Wu and Katarzyna Wystalska and Haakrho Yi and Wenyi Yuan and Iwona Zawieja and Chenglong Zhang},
editor = {Majeti Narasimha Vara Prasad and Paulo Jorge Campos de Favas and Meththika Vithanage and Venkata S Mohan},
url = {http://www.sciencedirect.com/science/article/pii/B9780128159071099876},
doi = {https://doi.org/10.1016/B978-0-12-815907-1.09987-6},
isbn = {978-0-12-815907-1},
year = {2019},
date = {2019-01-01},
booktitle = {Industrial and Municipal Sludge},
pages = {xv - xix},
publisher = {Butterworth-Heinemann},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Jinadasa, B K K K; Chathurika, G S; Jayasinghe, G D T M; Jayaweera, C D
Mercury and cadmium distribution in yellowfin tuna (Thunnus albacares) from two fishing grounds in the Indian Ocean near Sri Lanka Journal Article
In: Heliyon, vol. 5, no. 6, pp. e01875, 2019, ISSN: 2405-8440.
@article{JINADASA2019e01875,
title = {Mercury and cadmium distribution in yellowfin tuna (Thunnus albacares) from two fishing grounds in the Indian Ocean near Sri Lanka},
author = {B K K K Jinadasa and G S Chathurika and G D T M Jayasinghe and C D Jayaweera},
url = {http://www.sciencedirect.com/science/article/pii/S2405844019311387},
doi = {https://doi.org/10.1016/j.heliyon.2019.e01875},
issn = {2405-8440},
year = {2019},
date = {2019-01-01},
journal = {Heliyon},
volume = {5},
number = {6},
pages = {e01875},
abstract = {Mercury (Hg) and cadmium (Cd) are contaminants of great environmental concern due to their natural and anthropogenic origin, their ability of bioaccumulate through the food chain and their harmful effects on human health. In this study, the Hg and Cd accumulation in the muscle of 65 yellowfin tuna (Thunnus albacares) collected from two different catching sites of the Indian Ocean near Sri Lanka were evaluated. The samples were mineralized using microwave accelerated digestion, and the metals were detected by atomic absorption spectroscopy (AAS). The metal levels were not significantly different between the two sites (p > 0.05), and the average Hg and Cd concentrations were 0.48 ± 0.35 mg/kg and 0.017 ± 0.024 mg/kg, (wet weight basis) respectively. Only 6 (9.2%) and 2 samples (3.1%) exceeded the European Commission limits for Hg (1 mg/kg) and Cd (0.01 mg/kg), respectively. A comparatively strong positive correlation was observed between the THg concentration and the weight of the fish. However, there was no clear relationship between the concentration and size for Cd. These findings provide an understanding of the Hg and Cd distribution in yellowfin tuna in two fishing grounds in the Indian Ocean near Sri Lanka.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Mercury (Hg) and cadmium (Cd) are contaminants of great environmental concern due to their natural and anthropogenic origin, their ability of bioaccumulate through the food chain and their harmful effects on human health. In this study, the Hg and Cd accumulation in the muscle of 65 yellowfin tuna (Thunnus albacares) collected from two different catching sites of the Indian Ocean near Sri Lanka were evaluated. The samples were mineralized using microwave accelerated digestion, and the metals were detected by atomic absorption spectroscopy (AAS). The metal levels were not significantly different between the two sites (p > 0.05), and the average Hg and Cd concentrations were 0.48 ± 0.35 mg/kg and 0.017 ± 0.024 mg/kg, (wet weight basis) respectively. Only 6 (9.2%) and 2 samples (3.1%) exceeded the European Commission limits for Hg (1 mg/kg) and Cd (0.01 mg/kg), respectively. A comparatively strong positive correlation was observed between the THg concentration and the weight of the fish. However, there was no clear relationship between the concentration and size for Cd. These findings provide an understanding of the Hg and Cd distribution in yellowfin tuna in two fishing grounds in the Indian Ocean near Sri Lanka.
Athukorala, Wasantha; Martin, Wade; Wilson, Clevo; Rajapaksa, Darshana
Valuing bushfire risk to homeowners: Hedonic property values study in Queensland, Australia Journal Article
In: Economic Analysis and Policy, vol. 63, pp. 44 - 56, 2019, ISSN: 0313-5926.
@article{ATHUKORALA201944,
title = {Valuing bushfire risk to homeowners: Hedonic property values study in Queensland, Australia},
author = {Wasantha Athukorala and Wade Martin and Clevo Wilson and Darshana Rajapaksa},
url = {http://www.sciencedirect.com/science/article/pii/S0313592619300748},
doi = {https://doi.org/10.1016/j.eap.2019.04.013},
issn = {0313-5926},
year = {2019},
date = {2019-01-01},
journal = {Economic Analysis and Policy},
volume = {63},
pages = {44 - 56},
abstract = {Bushfires are a common occurrence and are an inevitable natural event in many regions of Australia in most years. Despite the dangers of such bushfires to nearby properties and human life, humans continue to live in close proximity to bushfire prone areas. The pertinent questions asked in this study are whether residents are aware of the dangers of living in such areas- and if so, is it reflected in lower property values? Such residents have the choice of either discounting the risks of bushfires in their neighbourhoods or deciding to pay more to live in bushfire areas for the positive amenity values afforded by forested bushland settings. Buyers paying a premium price to live in close proximity to green space are well documented in hedonic property (HP) values studies. We examine this phenomenon using data available for forested bushfire prone areas in the immediate environs of the city of Brisbane, Queensland, Australia using an HP values approach. For this study sales data of 1028 houses in four suburbs are used. The regression results clearly show that residents in fact are paying more to be close to green space (forested areas) which is also clearly identified as bushfire prone areas. The threat of bushfires may have an effect on property prices but it is dominated by the desire to live close to green spaces.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bushfires are a common occurrence and are an inevitable natural event in many regions of Australia in most years. Despite the dangers of such bushfires to nearby properties and human life, humans continue to live in close proximity to bushfire prone areas. The pertinent questions asked in this study are whether residents are aware of the dangers of living in such areas- and if so, is it reflected in lower property values? Such residents have the choice of either discounting the risks of bushfires in their neighbourhoods or deciding to pay more to live in bushfire areas for the positive amenity values afforded by forested bushland settings. Buyers paying a premium price to live in close proximity to green space are well documented in hedonic property (HP) values studies. We examine this phenomenon using data available for forested bushfire prone areas in the immediate environs of the city of Brisbane, Queensland, Australia using an HP values approach. For this study sales data of 1028 houses in four suburbs are used. The regression results clearly show that residents in fact are paying more to be close to green space (forested areas) which is also clearly identified as bushfire prone areas. The threat of bushfires may have an effect on property prices but it is dominated by the desire to live close to green spaces.
Abeyrathna, WANU; Fernando, HSD; de Silva, BGDNK
Insecticide susceptibility of Aedes albopictus from Sri Lanka: First report of the F1534C mutation in the country Journal Article
In: 2019.
@article{abeyrathna2019insecticide,
title = {Insecticide susceptibility of Aedes albopictus from Sri Lanka: First report of the F1534C mutation in the country},
author = {WANU Abeyrathna and HSD Fernando and BGDNK de Silva},
year = {2019},
date = {2019-01-01},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Wedage, WMM; Aberathne, AHMNR; Harischandra, IN; Gunawardana, D
A Nodulation-Proficient Nonrhizobial Inhabitant of Pueraria phaseoloides Journal Article
In: The Scientific World Journal, vol. 2019, 2019.
@article{wedage2019nodulation,
title = {A Nodulation-Proficient Nonrhizobial Inhabitant of Pueraria phaseoloides},
author = {WMM Wedage and AHMNR Aberathne and IN Harischandra and D Gunawardana},
year = {2019},
date = {2019-01-01},
journal = {The Scientific World Journal},
volume = {2019},
publisher = {Hindawi},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Prasadini, Manushika; Dayananda, Dilakshini; Fernando, Sachini; Harischandra, Iresha; Silva, Nissanka De
Blood Feeding Preference of Female Aedes aegypti Mosquitoes for Human Blood Group Types and Its Impact on Their Fecundity: Implications for Vector Control Journal Article
In: American Journal of Entomology, vol. 3, no. 2, pp. 43–48, 2019.
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Gunathilaka, Thilina L; Samarakoon, Kalpa W; Ranasinghe, P; Peiris, Dinithi L C
In-Vitro Antioxidant, Hypoglycemic Activity, and Identification of Bioactive Compounds in Phenol-Rich Extract from the Marine Red Algae Gracilaria edulis (Gmelin) Silva Journal Article
In: Molecules, vol. 24, no. 20, pp. 3708, 2019.
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Peiris, Dinithi L C; Chathu, Prathitha; Perera, DDBD; Moore, Harry D
1, 3-Dinitrobenze-Induced Genotoxicity Through Altering Nuclear Integrity of Diploid and Polyploidy Germ Cells Journal Article
In: Dose-Response, vol. 17, no. 3, pp. 1559325819876760, 2019.
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Fernando, Muthuthanthriege Dilusha Maduranganie; Adhikari, Achyut; Senathilake, Nambukara Helambage Kanishka Sithira; de Silva, Egodage Dilip; Nanayakkara, Chandrika Malkanthi; Wijesundera, Ravindra Lakshman Chundananda; Soysa, Preethi; others,
In Silico Pharmacological Analysis of a Potent Anti-Hepatoma Compound of Mushroom Origin and Emerging Role as an Adjuvant Drug Lead Journal Article
In: Food and Nutrition Sciences, vol. 10, no. 11, pp. 1313–1333, 2019.
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Chandrasiri, PKGK; Fernando, HSD; Silva, BGDNK De
Pre-imaginal development of Aedes aegypti in drains containing polluted water in urban cities in Sri Lanka Journal Article
In: International Journal of Tropical Insect Science, pp. 1–5, 2019.
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Pethiyagoda, PDRS; Alwis, SMDAU De; Silva, BGDNK De
Salinity tolerance of wild Poecilia reticulata (guppy) under laboratory conditions Journal Article
In: International Journal of multidisciplinary Studies, vol. 6, no. 2, 2019.
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Hegoda, WKDL; Fernando, HSD; Silva, BGDNK De
Insecticide Susceptibility Status in Aedes albopictus, in Selected Areas in Colombo District Proceedings Article
In: Proceedings of International Forestry and Environment Symposium, 2019.
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Abeyrathna, WANU; Fernando, HSD; de Silva, BGDNK
Insecticide susceptibility of Aedes albopictus from Sri Lanka: First report of the F1534C mutation in the country Journal Article
In: 2019.
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Wedage, WMM; Aberathne, AHMNR; Harischandra, IN; Gunawardana, D
A Nodulation-Proficient Nonrhizobial Inhabitant of Pueraria phaseoloides Journal Article
In: The Scientific World Journal, vol. 2019, 2019.
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Prasadini, Manushika; Dayananda, Dilakshini; Fernando, Sachini; Harischandra, Iresha; Silva, Nissanka De
In: American Journal of Entomology, vol. 3, no. 2, pp. 43–48, 2019.
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Gunathilaka, Thilina L; Samarakoon, Kalpa W; Ranasinghe, P; Peiris, Dinithi L C
In: Molecules, vol. 24, no. 20, pp. 3708, 2019.
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