Sri Lanka Association for the Advancement of Science (SLAAS)

Soil Science Australia (SSA)

Geological Society of Sri Lanka (GSSL)

Research Interests 

• Risk Assessment, Identification and Characterization of microplastics in the Environment/ Fate and transport of emerging contaminants in the environment  
• Mined Land Rehabilitation, Application of Biowaste for Soil Carbon Sequestration, Greenhouse Gases Mitigation in the Atmosphere
• Characterization and Treatment of Landfill Leachate/ Water and Wastewater Analysis
• Synthesis, Characterization and Application of Nano-scale Materials for Wastewater Treatment
• Municipal Solid Waste Management and Environmental Pollution Control Measures
• Value addition of low-quality gemstones, FTIR analysis of gemstones
• Human Rights, Assistive Technologies   

Teaching Experience (Present, Sabaragamuwa University, Sri Lanka)

ESNRM 22102 Environmental Toxicology

ESNRM 22210 Analytical Techniques for Environmental Sciences and Natural Resource

FST 31209 Food Industries and Environmental Management

ESNRM 32201/PST 32213/FST 32210 Cleaner Production and Green Productivity (i.e., Carbon Footprint)

ESNRM 32202 Energy Resource Management

ESNRM 32207 Study and Management of Natural Hazards (i.e., Biological Hazards) 

ESNRM 41218 Environment and Society

ESNRM 41201 Research Methodology & Scientific Communication

GD 2109 Gem Exploration and Environmental Management

GD 1110 Field and Industrial Visit

GD 2305 Gem Testing Equipment (i.e., FTIR)

Teaching Experience (Past, The University of Newcastle, Australia)

GEOS 2060 Soil Processes and Properties

ENVS 3007 Environmental Remediation

Articles in Peer Reviewed Journals

1. Bolan, S., Sharma, S., Mukherjee, S., Zhou, P., Mandal, J., Srivastava, P., Hou, D., Edussuriya, R., Vithanage, M., Truong, V.K., Chapman, J., Xu, Q., Zhang, T., Bandara, P., Wijesekara, H., Rinklebe, J., Wang, H., Siddique, K.H.M., Kirkham, M.B., Bolan. N. 2024. The distribution, fate, and environmental impacts of food additive nanomaterials in soil and aquatic ecosystems. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2024.170013
2. Sewwandi M., Wijesekara H., Rajapaksha, A.N.U., Soysa, S, Nanayakkara, N, Vithanage, M 2023. Interactions and transport of hexavalent chromium with microplastics in detergent-dissolved water. Physics and Chemistry of the Earth. https://doi.org/10.1016/j.pce.2023.103528
3. Sewwandi, M., Wijesekara, H., Rajapaksha, A.U., Soysa, S., Nanayakkara, N., Vithanage, M. 2023. Enhanced vector transport of microplastic-bound lead ions in organic matter rich water. International Journal of Environmental Analytical Chemistry, https://doi.org/10.1080/03067319.2022.2163896
4. Premarathna, K., Mohan, D., Biswas, J. K., Wijesekara, H., Jayasanka, J., Vithanage, M. (2023). Arsenic interaction with microplastics: Implications for soil-water-food nexus. Current Opinion in Environmental Science & Health, 34, 100482. https://doi.org/10.1016/j.coesh.2023.100482
5. Bolan, S., Govarthanan, M., Hou, D., Zhou, P., Biswal, B.K., Balasubramanian, R., Wijesekara, H., Bandara, D., Sabry, S., Jörg, R., Bolan, N., 2023. Climate change and its impacts on extreme weather events, and contamination of terrestrial, aquatic and atmospheric environments. Science of the Total Environment. https://doi.org/10.1016/j.scitotenv.2023.168388
6. Bolan, S., Wijesekara, H., Ireshika, A., Zhang, T., Pu, M., Petruzzelli, G., Pedron, F., Hou, D., Wan, L., Zhou, S., Zhao, H., Siddique, K.H.M., Wang, H., Rinklebe, J., Kirkham, M.B., Bolan, N. 2023. Tungsten contamination, behavior and remediation in complex environmental settings. Environment International. https://doi.org/10.1016/j.envint.2023.10827
7. Bolan, S., Kempton, L., McCarthy, T., Wijesekara, H., Piyathilake, U., Jasemizad, T., Padhye, L. P., Zhang, T., Rinklebe, J., Wang, H., Kirkham, M., Siddique, K. H., Bolan, N. 2023. Sustainable management of hazardous asbestos-containing materials: Containment, stabilization and inertization. Science of The Total Environment, 881, 163456. DOI: https://doi.org/10.1016/j.scitotenv.2023.163456
8. Bolan, S., Wijesekara, H., Tanveer, M., Boschi, V., Padhye, L. P., Wijesooriya, M., Wang, L., Jasemizad, T., Wang, C., Zhang, T., Rinklebe, J., Wang, H., Lam, S. S., Siddique, K. H., Kirkham, M., & Bolan, N. 2023. Beryllium contamination and its risk management in terrestrial and aquatic environmental settings. Environmental Pollution, 320, 121077. https://doi.org/10.1016/j.envpol.2023.121077
9. Sewwandi, M., Wijesekara, H., Rajapaksha, A. U., Soysa, S., & Vithanage, M. 2023. Microplastics and plastics-associated contaminants in food and beverages; Global trends, concentrations, and human exposure. Environmental Pollution, 317, 120747. https://doi.org/10.1016/j.envpol.2022.120747
10. Chamanee, G., Sewwandi, M., Wijesekara, H., Vithanage, M. 2023. Global perspective on microplastics in landfill leachate; Occurrence, abundance, characteristics, and environmental impact. Waste Management, 171, 10-25. https://doi.org/10.1016/j.wasman.2023.08.011
11. T. Atugoda, H. Piyumali, H. Wijesekara, C. Sonne, S.S. Lam, K. Mahatantila, M. Vithanage. 2022. Nanoplastic occurrence, transformation and toxicity: a review. Environmental Chemistry Letters. DOI: 10.1007/s10311-022-01479-w
12. R. Wijewardhana, S Senarathne, C. K Jayawardana, V Edirisinghe, H Wijesekara, N Mannapperuma. 2022. Evaluation of the effect of landfill leachate on surface and groundwater quality: a case study in tropical Sri Lanka using the evidence of stable isotopes. Environmental Monitoring and Assessment. 194: 628. DOI: 10.1007/s10661-022-10282-7 
13. A. U Rajapaksha, R Selvasembian, A Ashiq, V Gunarathne, A Ekanayake, V.O Perera, H Wijesekera, S Mia, M Ahmad, M Vithanage, Y. S Ok, (2022). A systematic review on adsorptive removal of hexavalent chromium from aqueous solutions: Recent advances. Science of The Total Environment. 809, 152055.
14. S.A Hoang, N Bolan, A.M.P Madhubashani, M Vithanage, V Perera, H Wijesekara, H Wang, P Srivastava, M.B Kirkham, B.S Mickan, J Rinklebe, K.H.M Siddique. (2022) Treatment processes to eliminate potential environmental hazards and restore agronomic value of sewage sludge: A review. Environmental Pollution. 293, 118564.
15. Sewwandi, M., Amarathunga, A., Wijesekara, H., Mahatantila, K., & Vithanage, M. (2022). Contamination and distribution of buried microplastics in Sarakkuwa beach ensuing the MV X-Press Pearl maritime disaster in Sri Lankan sea. Marine Pollution Bulletin, 184, 114074. https://doi.org/10.1016/j.marpolbul.2022.114074
16. Sewwandi, M., Premarathne, K. S. D., Wijesekara, H., Rajapaksha, A. U., Soysa, S., Vithanage, M. 2022.Vector transport of microplastics bound potentially toxic elements (PTEs) in water systems. Journal of the National Science Foundation of Sri Lanka. 50, 331-344.
17. N Bolan, M Kumar, E Singh, A Kumar, L Singh, S Kumar, S Keerthanan, S.A Hoang, A El-Naggar, M Vithanage, B Sarkar, H Wijesekara, S Diyabalanage, P Sooriyakumar, A Vinu, H Wang, M.B Kirkham, S M Shaheen, J Rinklebe, K.H.M Siddique (2021) Antimony contamination and its risk management in complex environmental settings: A review. Environment International. 158, 106908.
18. N Bolan, S. A. Hoang, M Tanveer, L Wang, S Bolan, P Sooriyakumar, B Robinson, H Wijesekara, M Wijesooriya, S Keerthanan, M Vithanage, B Markert, J Rinklebe, S Fränzle, S Wünschmann, B Sarkar, A Vinu, M. B Kirkham, K.H.M Siddique, J Rinklebe (2021). From mine to mind and mobiles - Lithium Contamination and its Risk Management. Environment Pollution. 290: 118067.
19. N Bolan, J Beiyuan, S Gupta, S.A Hoang, D Hou, A Karakoti, S Joseph, S Jung, Ki-Hyun Kim, M.B Kirkham, H.W Kua1, M Kumar, E.E Kwon, Y.S Ok, V Perera, J Rinklebe, S.M Shaheen, B Sarkar, A.K Sarmah, B.P Singh, G Singh, D.C.W Tsang, K Vikrant, M Vithanage, A Vinu, H Wang, H Wijesekara, Y Yan, S.A Younis, L.V Zwieten. Multifunctional applications of biochar beyond carbon storage. International Materials Reviews. 67 (2), 150-200. https://doi.org/10.1080/09506608.2021.1922047
20. S A Hoang, B Sarkar, B Seshadri, D L H Wijesekara, M Vithanage, C Liyanage, P A Kolivabandara, J Rinklebe, S S Lam, A Vinu, H Wang, M B. Kirkham, N S. Bolan. 2021. Mitigation of petroleum-hydrocarbon-contaminated hazardous soils using organic amendments: A review. Journal of Hazardous Materials. 416, 125702.
21. H Wijesekara, K Colyvas, P Rippon, N.S Bolan, M. Manna, P Matthews, R Thangavel, B Seshadri, Y.M Awad, A Surapaneni, C Saint, G Tian, S Torri, M.B Kirkham, M Vithanage. 2021. Carbon sequestration value of biosolids applied soil: a global meta-analysis. Journal of Waste Management, 284, 112008.
22. T Atugoda, H Wijesekara, N Bolan, A. K Sarmah M Vithanage. 2021. Interactions between microplastics and pharmaceuticals and personal care products in the aqueous environment: Implications for vector transport. Environment International. 149, 106367.
23. N Bolan, B Sarkar, Y Yan, Q Li, H Wijesekara, K Kannan, D.C.W Tsang, M Schauerte, J Bosch, H Noll, Y.S Ok, K Scheckel, J Kumpiene, K Gobindlal, M Kah, J Sperry, M.B Kirkham, H Wang, Y.F Tsang, D Hou, J Rinklebe. 2021. Remediation of poly- and perfluoroalkyl substances (PFAS) contaminated soils – to mobilize or to immobilize or to destroy? Journal of Hazardous Materials. 401, 123892.
24. L Zhang, C Ou, D Magana-Arachchi, M Vithanage, K.S Vanka, T Palanisami, K Masakorala, H Wijesekara, Y Yan, N Bolan, M. B Kirkham (2021) Indoor Particulate Matter in Urban Households: Sources, Pathways, Characteristics, Health Effects, and Exposure Mitigation. International Journal of Environmental Research and Public Health, 18, 11055 DOI https://doi.org/10.3390/ijerph182111055
25. T Atugoda, H Wijesekara, D.R.I.B Werellagama, K.B.S.N Jinadasa, N Bolan, M Vithanage. 2020. Adsorptive interaction of antibiotic Ciprofloxacin on polyethylene microplastics: Implications for vector transport in Water. Environmental Technology and Innovation, 19, 100971 DOI https://doi.org/10.1016/j.eti.2020.100971
26. L Bradney, H Wijesekara, K.N Palansooriya, N. Obadamudalige, N.S Bolan, Y.S Ok, J Rinklebe, Ki-Hyun Kim_, M.B Kirkham. 2019. Particulate plastics as a vector for toxic trace-element uptake by aquatic and terrestrial organisms and human health risk. Environmental International, 131, 104937 DOI org/10.1016/j.envint.2019.104937
27. R Thangavel, N.S Bolan, M.B Kirkham, H Wijesekara, M Kanchikerimath, C.S Rao, S Sandeep, J Rinklebe, Y.S Ok, B.U Choudhury, H Wang, C Tang, X Wang, Z Song, O.W Freeman II. 2019. Soil organic carbon dynamics: Impact of land use changes and management practices: A review. Advances in Agronomy 156, 1-107. DOI org/10.1016/bs.agron.2019.02.001
28. H Wijesekara, N.S Bolan, L Bradney, B Seshadri, A Kunhikrishnan, R Dharmarajan, Y.S Ok, J Rinklebe, M.B Kirkham, M Vithanage. 2018. Trace element dynamics of biosolids-derived microbeads. Chemosphere. 199 331-339 DOI org/10.1016/j.chemosphere.2018.01.166
29. H Wijesekara, N.S Bolan, R Thangavel, B Seshadri, A Surapaneni, C Saint, C Hetherington, P Matthews, M Vithanage. 2017. The impact of biosolids application on organic carbon and carbondioxide fluxes in soil. Chemosphere. 189 565-573 DOI org/10.1016/j.chemosphere.2017.09.090
30. R Thangarajan, N.S Bolan, A Kunhikrishnan, H Wijesekara, Y Xu, D.C.W Tsang, H Song, Y.S Ok, D Hou. 2018. The potential value of biochar in the mitigation of gaseous emission of nitrogen. Science of the Total Environment. 612 257–268 DOI org/10.1016/j.scitotenv.2017.08.242
31. A Kunhikrishnan, G Choppala, B Seshadri, H Wijesekara, N.S Bolan, K Mbene, W-I Kim, 2017. Impact of wastewater derived dissolved organic carbon on reduction, mobility, and bioavailability of As(V) and Cr(VI) in contaminated soils. Journal of Environmental Management. 186 (2) 183-191 DOI org/10.1016/j.jenvman.2016.08.020
32. P Kumarathilaka, V Jayaweera, H Wijesekara, I.R.M Kottegoda, S.R.D Rosa, M Vithanage, 2016. Insights into starch coated nano-zero valent iron-graphene composite for Cr(VI) removal from aqueous medium. Journal of Nanomaterials. 1-10 DOI org/10.1155/2016/2813289
33. M Vithanage, H Wijesekara, S.S Mayakaduwa. 2016. Isolation, purification and analysis of dissolved organic carbon (DOC) from Gohagoda dumpsite leachate, Sri Lanka, Environmental Technology. DOI org/10.1080/09593330.2016.1235229
34. H Wijesekara, N.S Bolan, M Vithanage, Y Xu, S Mandal, S.L Brown, G.M Hettiarachchi, G.M Pierzynski, L Huang, Y.S Ok, M.B Kirkham, C Saint, A Surapaneni. 2016. Utilization of biowaste for mine spoil rehabilitation. Advances in Agronomy. Volume 138, 97-173 DOI 10.1016/bs.agron.2016.03.001
35. B Seshadri, N.S Bolan, H Wijesekara, A Kunhikrishnan, R Thangarajan, F Qi, R Matheyarasu, C Rocco, M Kenneth, R Naidu. 2016. Phosphorus-cadmium interactions in paddy soils. Geoderma. Volume 270, 43-59. DOI 10.1016/j.geoderma.2015.11.029
36. S Chowdhury, N.S Bolan, B Seshadri, A Kunhikrishnan, H Wijesekara, Y Xu, J Yang, G-H Kim, D Sparks, C Rumpel. 2015. Co-composting solid biowastes with alkaline materials to enhance carbon stabilization and revegetation potential, Environmental Science Pollution Research. Volume 23 (8) 7099-7110 DOI 10.1007/s11356-015-5411-9
37. S.S.R.M.D.H.R Wijesekara, S.S Mayakaduwa, A.R Siriwardana, N.D Silva, B.F.A Basnayake, K Kawamoto, M Vithanage. 2014 Fate and transport of pollutants through a municipal solid waste landfill leachate in Sri Lanka. Journal of Environmental Earth Sciences. ISSN 1866-6280, DOI 10.1007/s12665-014-3075-2
38. S.S.R.M.D.H.R Wijesekara, B.F.A Basnayake, M Vithanage. 2014. Organic coated nano-particulate zero valent iron for remediation of chemical oxygen demand (COD) and dissolved metals from tropic landfill leachate. Journal Environmental Science and Pollution Research. Vol. 21, p. 7075-7087 DOI 10.1007/s11356-014-2625-1
39. S.S.R.M.D.H.R Wijesekara, S.N.D Silva, D Wijesundara, B.F.A Basnayake, M Vithanage. 2014. Landfill leachate plume delineation and lithologic profiling using surface resistivity in an open municipal solid waste dumpsite, Sri Lanka. Environmental Technology Journal. DOI 10.1080/09593330.2014.963697
40. B.G.N Sewwandi, M Vithanage, S.S.R.M.D.H.R Wijesekara, M.I.M Mowjood, S Hamamoto, K Kawamoto. 2014. Adsorption of Cd(II) and Pb(II) Humic Acid Treated Coconut (Cocos nucifera) Husk. Journal of Hazardous, Toxic, and Radioactive Waste. DOI abs/10.1061/(ASCE)HZ.2153-5515.0000196
41. M Vithanage, A.U Rajapaksha, H Wijesekara, K Mahatantila, N Weerarathne, Y.S Ok. 2013. Effect of soil type and fertilizer on As speciation in rice paddy contaminated with As-containing pesticide. Journal of Environmental Earth Sciences. ISSN 1866-6280, DOI 10.1007/s12665-013-2486-9
42. B.G.N Sewwandi, M Vithanage, S.S.R.M.D.H.R Wijesekara, A.U Rajapaksha, D.G.L.M Jayarathna, M.I.M Mowjood. 2012. Characterization of aqueous Pb(II) and Cd(II) biosorption on native and chemically modified Alstonia macrophylla saw dust. Bioremediation Journal. 16(2):113–124, 2012. DOI 10.1080/10889868.2012.665963
43. D.A.S Gamage, S.S.R.M.D.H.R Wijesekara, G.W.N.L Sarathchandra, B.F.A Basnayake, W.A.J.M Costa. 2011. Estimation of Nitrate and Phosphate Leaching from Lysimeter Simulation of Rice Straw Landfill Bioreactor and Evaluation of Fertilizer Quality of Resulting Compost. Tropical Agricultural Research, Short communication, 22(2) 220-228 (ISSN:1016-1422).  (http://www.pgia.ac.lk/sites/default/files/congress/journel/V22/Journal_No-2.htm)

Book chapters

1. Premarathna, K.S.D., Ramanayaka, S., Navaratne, A., Wijesekara, H., Jayasanka, J., Vithanage, M. (2023). Compost‐hosted microplastics municipal solid waste compost. pp. 433-448.
2. Wijesooriya, M.M., Wijesekara, H., Bolan, N., Rajapaksha, A.U., Vithanage, M, (2023). Clays and clay composites; long-lasting applications in environmental remediation. pp. 3-28
3. Wijesesuriya, M, Wijesekara, H., Sewwandi, M., Soysa, S., Rajapaksha, A.U., Vithanage, M., Bolan. N. 2023. Microplastics and soil nutrient cycling. Microplastics in the Ecosphere: Air, Water, Soil, and Food, pp 321-338   https://doi.org/10.1002/9781119879534.ch19
4. P Srivastava, N Bolan, V Casagrande, R Perera, H Wijesekara. 2021. Origin, distribution, fate and remediation of microplastics in biowastes and biowaste-amended soil. In: Jajati Mandal and Pritam Ganguly (Eds.). Environmental Contaminants: Impact, Assessment & Remediation/ Apple Academic Press. (In press)
5. M. Sewwandi, H. Wijesekara, S. Soysa, V. Gunarathne, A.U. Rajapaksha, and M. Vithanage, 2022. Biological treatment of endocrine-disrupting chemicals (EDCs). In Biotechnology for Environmental Protection. Singapore: Springer Nature Singapore. Page 165-191.
6. N Bolan, M.B Kirkham, V Perera, S Mayakaduwage, A Ekanayake, A.U Rajapaksha, H Wijesekara, P Srivastava, M Vithanage. 2022. Phytoremediation of soils contaminated with poly- and per-fluoroalkyl substances (PFAS). A. Pandey, M. Á. Sanromán, G. Du, C. R. Soccol and C.-G. Dussap (Eds.). Current Developments in Biotechnology and Bioengineering.  Elsevier. Chapter 14. Page 275-290.
7. N Bolan, S.A Hong, Y Yan, S Ramanayake, P Koliyabandara, G Chamanee, H Wijesekara, R. Mukhopadhyay, B Sarkar, M. Vithanage, M.B Kirkham. 2021. Landfills as source of PFAS contamination of soil and groundwater. In: David M. Kempisty and LeeAnn Racz (Eds.). Forever chemicals. Chapter 6. Page 119-142. DOI 10.1201/9781003024521-7
8. L Bradney, H Wijesekara, N.S Bolan, M.B Kirkham. 2020. Sources of Particulate Plastics in Terrestrial Ecosystems. In: N.S Bolan, M.B Kirkham, C Halsband, D Nugegoda and Y.S Ok (Eds.). Particulate Plastics in Terrestrial and Aquatic Environments. Chapter 1. DOI https://doi.org/10.1201/9781003053071
9. S Mandal, N. S Bolan, B Sarkar, H Wijesekara, L Bradney, M.B Kirkham. 2020. Environmentally Toxic compounds of plastics. In: N.S Bolan, M.B Kirkham, C Halsband, D Nugegoda and Y.S Ok (Eds.). Particulate Plastics in Terrestrial and Aquatic Environments. Chapter 11. DOI https://doi.org/10.1201/9781003053071
10. K.N Palansooriya, H Wijesekara, L Bradney, P Kumarathilaka, J Bundschuh, N.S Bolan, T Rocha-Santos, C Gu, Y.S Ok. 2020. Characteristics of Particulate Plastics in Terrestrial Ecosystems. In: N.S Bolan, M.B Kirkham, C Halsband, D Nugegoda and Y.S Ok (Eds.). Particulate Plastics in Terrestrial and Aquatic Environments. Chapter 7. DOI https://doi.org/10.1201/9781003053071
11. H Wijesekara, L Bradney, S Mandal, B Sarkar, H Song, N.S Bolan, M.B Kirkham. 2020. Particulate plastics as vectors of heavy metal(loid)s. In: N.S Bolan, M.B Kirkham, C Halsband, D Nugegoda and Y.S Ok (Eds.). Particulate Plastics in Terrestrial and Aquatic Environments. Chapter 12. DOI https://doi.org/10.1201/9781003053071
12. H Wijesekara, N.S Bolan, K Colyvas, B Seshadri, Y.S Ok, Y.M Awad, Y Xu, R Thangavel, A Surapaneni, C Saint. M Vithanage. 2017. Use of Biowaste for Mine Site Rehabilitation A Meta-Analysis on Soil Carbon Dynamics. In: N.S Bolan, M.B Kirkham, Y.S Ok (Eds.) Spoil to soil. CRC press. Florida. USA
13. S.R Gurung, H Wijesekara, B Seshadri, R.B Stewart, P.E.H Gregg, N.S Bolan. 2017. Sources and Management of Acid Mine Drainage. In: N.S Bolan, M.B Kirkham, Y.S Ok (Eds.) Spoil to soil. CRC press. Florida. USA
14. R Thangavel, R Karunanithi, H Wijesekara, Y Yan, B Seshadri, N.S Bolan. 2017. Phyto technologies for mine site rehabilitation. In: N.S Bolan, M.B Kirkham, Y.S Ok (Eds.) Spoil to soil. CRC press. Florida. USA
15. B Sarkar, H Wijesekara, S Mandal, M Singh, N.S Bolan. 2017. Characterisation and improvements of physical, chemical and biological properties of mine wastes. In: N.S Bolan, M.B Kirkham, Y.S Ok (Eds.) Spoil to soil. CRC press. Florida. USA
16. H Wijesekara, N.S Bolan, P Kumarathilaka, N Geekiyanage, A Kunhikrishnan, B Seshadri, C Saint, A Surapaneni, M Vithanage. 2016. Biosolids enhances mine site rehabilitation and revegetation. In: M.N.V. Prasad, Kaimin Shih (Eds.), Environmental Materials and Waste - Resource Recovery and Pollution Prevention [EMW-RR&PP], Elsevier, USA
17. 14. S Mandal, A Kunhikrishnan, N Bolan, H Wijesekara, R Naidu. 2016. Application of Biochar Produced from Biowaste Materials for Environmental Protection and Sustainable Agriculture Production. In: M.N.V. Prasad, Kaimin Shih (Eds.), Environmental Materials and Waste - Resource Recovery and Pollution Prevention [EMW-RR&PP], Elsevier, USA
18. P Kumarathilaka, H Wijesekara, N.S Bolan, A Kunhikrishnan, M Vithanage. 2016. Phytoremediation of landfill leachates. In: Abid A Ansari, Sarvajeet Singh Gill, Ritu Gill, Guy R. Lanza (Eds.), Phytoremediation: Management of Environmental Contaminants, Springer, New York, USA
19. N Geekiyanage, M Vithanage, S.S.R.M.D.H.R. Wijesekara, D.K.N.G Pushpakumara. 2014. State of the Environment and Environmental Governance in Sri Lanka. In: Sacchidananda Mukherjee and Debashis Chakraborty (Eds.). Routledge, U.K. Environmental Challenges and Governance: Diverse perspectives from Asia (ISBN: 9780415721905)
20. M Vithanage, S.S.R.M.D.H.R Wijesekara, A.R Siriwardana, S.S Mayakaduwa, Y.S. Ok. 2014. Management of Municipal Solid Waste Landfill Leachate: A Global Environmental Issue. Environmental Deterioration and Human Health: Natural and anthropogenic determinants. In: Abdul Malik, Elisabeth Grohmann and Rais Akhtar (Eds.). Springer, The Netherlands, pp 236-287 (DOI 10.1007/978-94-007-7890-0_11)
21. M Vithanage, S.S.R.M.D.H.R Wijesekara, I.P.L Jayarathna, A Prakash, S Sharma, A.K Ghosh. 2014. Nanomaterials for landfill leachate treatment in the humid tropics; The Sri Lankan perspective. Aquananotechnology: Global Prospects. In: David E. Reisner and T. Pradeep (Eds.). CRC Press (Taylor & Francis imprint), pp 759-776 (DOI:10.1201/b17455-38)

Other Science Dissemination (Selected)

1. Anjana Divyanjalee, Ruchini Ruwandanee, Sajuni Randeniya, Chamudi Buwanayak, Hasintha Wijesekara. Microplastics are harmful to the ocean, “Sagarayata hanikarana Kshudra plastic”. Chemical Watch. 3^rd Issue. September 2023. ISSN 2989-0837.
2. Malith Mihiran Perera, Madushika Sewwandi, Hasintha Wijesekara, Meththika Vithanage. Kshudra plastic katawalata athwana parasarika iranama saha ewaye bauwthika-rasayanika jeernaya. Chemical watch. September 2023. ISSN 2989-0837.
3. Gayathri Chamanee, Hasintha Wijesekara, Madushika Sewwandi, Meththika Vithanage. Unseen danger in open dumpsites. “Wiwuthra kasala bimwala sagauna anathura” Chemical watch. June 2023. ISSN 2989-0837.
4. Hasintha Wijesekara, Lauren Bradney, Anitha unhikrishnan, Nanthi Bolan, Aravind Surapaneni, Wang Hailong, Young Sik Ok. Particulate plastics in soil: friend or foe?. Remediation Australasia, Digital Publication of CRC CARE, September 2018, Issue 20 https://www.remediationaustralasia.com.au/articles/particulate-plastics-soil-friend-or-foe
5. Meththika Vithanage, Hasintha Wijesekara. Wealth to waste, and waste to water in Sri Lanka: characterising leachate from dump sites. Remediation Australasia, Digital Publication of CRC CARE, April 2018, Issue 19 https://www.remediationaustralasia.com.au/articles/wealth-waste-and-waste-water-sri-lanka-characterising-leachate-dump-sites
6. Hasintha Wijesekara, Meththika Vithanage. Trends in emerging environmental pollutants, “Abinawayen mathuwana parisara dhusaka” Vidusara, 12 April 2017.
7. Possibility of Identifying Treated and Non-treated Sri Lankan Ruby and Sapphires by FT-IR Spectroscopy, Gemmological Association of Sri Lanka, 2014. http://www.gemmology.lk/pdf/Possibility-of-Identifying-Treated.pdf
8. Sandun Ilangasinge, Hasintha Wijesekara, Meththika Vithanage, Blue sapphire treatment. “Paludu Pirau Nil Maniken Ape Manik Karmanthayata Anathurak”, 19 January 2014, Lankadeepa Treated blue sapphires-A great threat for our gem industry, Lankadeepa, 19 January 2014.
9. Hasintha Wijesekara, Meththika Vithanage, Photochemical smog. “Prabha Rasayanika Duaraya ha Bandunu Ithihasagatha Khedawachakaya”, 24 April 2013, Vidusara World’s worst chemical accidents, Vidusara, 13 February 2013.
10. Hasintha Wijesekara, Meththika Vithanage, Chemical disasters. “Lowa Sidu u Bihisunu Rasayanika Anathuru”, 06 February 2013, Vidusara Historical disasters of Photochemical smog, Vidusara, 24 April 2013.
11. Hasintha Wijesekara, Meththika Vithanage, Nanotechnology for landfill leachate treatment. “Apajalaya Piripahadu Kireema Sandaha Kshudra Ninithi Loha saha Loha Oxide Bhavithaya”, 14 November 2012, Vidusara Application of nano metals and metal oxides for wastewater treatment), Vidusara, 14 November 2012.

1. Microplastics Bound Transport and Differential Bioavailability of Pharmaceuticals, Personal Care Products (PPCPs) and Toxic Trace Elements in Water. National Research Council, Sri Lanka, 2.24 million LKR (2020/2022) –  Principal Investigator
2. Value addition and commercialization of low gem-quality corundum in Sri Lanka using innovative heat treatment technology based on physiochemical analysis. Accelerating Higher Education Expansion and Development (AHEAD), University Grant Commission, Sri Lanka and World Bank, 40 million LKR (2019-2022) – Co-investigator
3. Development of infrastructure and laboratory instruments for conducting research and teaching related to Gemmology diploma program (Funded by Sri Lanka Gem Dealers and Miners Association, 10 million LKR (2022) – Coordinator (Industry)

1. Advisory Committee Member – Gem and Jewelry related Industries, Ministry of Industries, Sri Lanka (2022)
2. Expert Panel Member - Construction of Sewage Treatment Plant (STP) for Sabaragamuwa University of Sri Lanka (2021)
3. Member of the working group on Biochar under Agriculture Sectoral Committee of Sri Lanka Standards Institution (SLSI) (2021)
4. Committee Member of preparing Initial Environmental Examination (IEE) report to the proposed building complex of the Faculty of Medicine, Sabaragamuwa University (2019)
5. EIA Team Member – Rehabilitation of Gohagoda Dumpsite and Establishment of an Integrated Solid Waste Management System for Kandy Municipal Council (February 2010 – August 2014)

Training Programmes / Field Excursions Attended - International 

• Landscapes and soils in the mountainous region of Rio de Janeiro State, Brazil (15 August 2018)
• Agricultural Drones: Principles and Applications workshop, ASA-CSSA-SSSA International Annual Meeting, Tampa, Florida, USA (22 October 2017)
• Northern Southland Farm Systems, Queenstown, New Zealand (12 December 2016)
• Stable Isotopes in Biosphere Systems (SIBS) at Daintree Rainforest Observatory, James Cook University, Queensland, Australia (17-24 July 2016)
• Mangoola Mining site Rehabilitation Projects, Singleton, Australia (8 April 2016)
• Instrument training on ICP-MS and GC-MS at Green Chemical Futures, Monash University, Australia (17 September 2015)
• National Workshop on Nuclear Energy for Australia, Hilton Hotel, Adelaide, Australia (16 June 2015)
• Nanosafety workshop, City west campus, University of South Australia (27-28 April 2015)
• Instrument training on XPS, SEM, LC-MS at the Department of Chemistry, Indian Institute of Technology, Chennai, India (27 June to 8 July, 2011)
• Monitoring landfill leachate and air pollution from sanitary landfills, West New Territories Landfill and Ecopark, Hong Kong (8 May 2013)

Training Programmes / Field Excursions Attended - National 

• Institutional Carbon Footprint Calculations, Green Building Council of Sri Lanka, Colombo (31 January 2019)
• Advance Scientific Instruments for Material Characterization” (Theory & Practicals on XRD, SEM, FTIR, UV-Visible Spectroscopy, Particle Size Analyzer) Industrial Technology Institute, Colombo (12-13 March 2014)

Paper Publications in Scientific Conferences

1. M Sewwandi, H Wijesekara, A.U. Rajapaksha, S Soysa, and M Vithange. 2022. Microplastics-Assisted Hexavalent Chromium Transportation in Soapy Water Environments. International Research Conference of the SLTC Research University, Sri Lanka  2022. 29-30 September 2022
2. S Sandanayake, S. Diyabalanage, H Wijesekara, V Edirisinghe, M Vithanage. Lability and bioavailability of toxic heavy metals in Ratnapura district gem sediments, Sri Lanka. Moratuwa Engineering Research Conference (MERCon 2021), 27-29 July 2021
3. H Wijesekara, L Bradney, A Kunhikrishnan, Y Liu, A Surapaneni, Y.S Ok, N Bolan. Particulate plastics in soil: friend or foe? National Soil Science Conference, Canberra 18-23 November 2018
4. H Wijesekara, N.S Bolan, R Thangavel, B Seshadri, A Surapaneni, C Hetherington, P Matthews, C Saint. Land application of biosolids for climate-smart agriculture in Hunter region. Soil science Australia, NSW branch, Hunter region regional meeting, the University of Newcastle, Callaghan 6-7 July 2017
5. H Wijesekara, N.S Bolan, B Seshadri, R Thangavel, A Surapaneni, C Hetherington, P Matthews, C Saint. Estimation of CO₂ emissions from biosolid land application. Cleanup 2017. Contaminated land conference at Crown Conference Centre, Melbourne, Australia. September 10-13, 2017.
6. R Thangavel, H Wijesekara, Y Xu, B Seshadri, N.S Bolan. 2017. Impact of Land Use on Soil Organic Carbon Fractions and CO2 Efflux. Cleanup 2017. Contaminated land conference at Crown Conference Centre, Melbourne, Australia. September 10-13, 2017.
7. N.S Bolan, H Wijesekara, D Lamb, B Seshadri. 2017. Organic Recycling to Benefit Agricultural Production and Environmental Protection. Cleanup 2017. Contaminated land conference at Crown Conference Centre, Melbourne, Australia. September 10-13, 2017.
8. H Wijesekara, K Colyvas, N Bolan, B Seshadri, Y.S Ok, Y Awad, A Surapaneni, C Saint, P Kumarathilaka, M Vithanage.  2016. Biosolids Application and Soil Organic Carbon Dynamics: A Meta-Analysis. 5^th Annual International Research Conference, Faculty of Management and Commerce, South Eastern University of Sri Lanka. 23 November 2016 Pages 405-409
9. H Wijesekara, N.S Bolan, A Surapaneni, C Saint. 2015. Utilization of biowastes for mine spoils rehabilitation. Cleanup 2015. Contaminated land conference at Crown Conference Centre, Melbourne, Australia. September 13-16, 2015. (http://www.crccare.com/files/dmfile/CLEANUP_2015_PROCEEDINGS-web.pdf)
10. S Illangasinghe, H Wijesekara, M Vithanage, C.P Udawatte. 2015. Application of Fourier Transform Infrared Spectroscopy for the identification of treated sapphires in Sri Lanka. The 4^th International Gem & Jewelry Conference (GIT 2014) at Holiday Inn Chiangmai, Thailand. 8-9 December 2014 and Post-Conference Excursion in Phrae-Sukhothai, Thailand on December 10-12, 2014.
11. P Kumarathilaka, H Wijesekara, B.F.A Basnayake, K Kawamoto, M Vithanage. 2014. Volatile organic compounds (VOCs) produced from Gohagoda municipal solid waste landfill leachate, Sri Lanka. The 5^th International conference on Sustainable Built Environment, Kandy, Sri Lanka, 12-15 December 2014.
12. S.S.R.M.D.H.R Wijesekara, N.D Silva, B.F.A Basnayake, M Vithanage. 2013. Application of resistivity imaging techniques for ground investigation and characterization of open municipal solid waste dump site in Sri Lanka. International conference on solid waste 2013: Innovation in Technology and Management, Wan Chai, Hong Kong, 5-8 May 2013 (ISBN 978-988-19988-4-2).
13. S.S Mayakaduwa, S.S.R.M.D.H.R Wijesekara, A.R Siriwardana, B.F.A Basnayake, M Vithanage. 2013. Evaluation of physicochemical characteristics, heavy metals and humic substances in leachate generated from Gohagoda municipal solid waste dumpsite. International conference on solid waste 2013: Innovation in Technology and Management, Wan Chai, Hong Kong, 5-8 May 2013 (ISBN 978-988-19988-4-2).
14. S.S.R.M.D.H.R Wijesekara, M Vithanage, K Dideriksen, K Mahatantila, B.F.A Basnayake. 2012. Application of nano zero valent iron for landfill leachate treatment in the tropics. The 7^th Asian Pacific Landfill Symposium, Bali, Indonesia, 8-11 October 2012 (http://www.aplasbali2012.org/downloards)
15. S.S Mayakaduwa, A.R Siriwardana, S.S.R.M.D.H.R Wijesekara, B.F.A Basnayake, M Vithanage. 2012. Characterization of landfill leachate draining from Gohagoda open dumpsite for dissolved organic carbon nutrients and heavy metals. The 7^th Asian Pacific Landfill Symposium, Bali, Indonesia, 8-11 October 2012 (http://www.aplasbali2012.org/downloards)
16. S.S.R.M.D.H.R Wijesekara, R.M.A.U Rajapaksha, I.P.L Jayarathne, B.F.A Basnayake, M Vithanage. 2011. Toxic metals in soils contaminated by landfill leachate in Kandy, Sri Lanka. The 12^th Annual Conference of Thai Society of Agricultural Engineering “International Conference on Agricultural Engineering” Chon-Chan Pattaya Resort, Chonburi, Thailand, 31 March-1 April 2011.
17. B.G.N Sewwandi, S.S.R.M.D.H.R Wijesekera, A Rajapaksha, M.I.M Mowjood, M Vithanage. 2011. Risk of Soil and Water Pollution by Heavy Metals in Landfill Leachate. The 12^th Annual Conference of Thai Society of Agricultural Engineering “International Conference on Agricultural Engineering” Chon-Chan Pattaya Resort, Chonburi, Thailand, 31 March-1 April 2011.

Abstract Publications in Scientific Conferences

1. P.U. Kariyawasam, W.M.K. Vilashini, M.L.F. Rilwana, A.P.L.B. Karunathilake, D.P.I.U.S. Kumara, M.A.S. Madushani, Silwa S.L.K.K., S.S.R.M.D.H.R. Wijesekara, A.A.M. Sewwandi. M. Vithanage. 2023. Microplastic Pollution in Commercial Edible Salts from Sri Lanka. 9^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL), 6 - 8 December 2023
2. B.T. Dilshan, J.M.M.P.B. Jayasooriya, K.H. Nirmana, P.S. Ishara, N.M.C. Ranasinghe, S.P. Weerasinghe, R.M.N.M. Wickramarathne, S.S.R.M.D.H.R. Wijesekara, R.M.K.T. Rathnayaka. 2023.  Spatial Distribution Patterns of Microplastics in Contaminated Soil and Sediments at Kanadola Recycle Center, Rathnapura, Sri Lanka. 9^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL), 6 - 8 December 2023
3. H.W.L. Fonseka, S.K. Gunatilake, J.M.C.K. Jayawardana, and S.S.R.M.D.H.R.  Wijesekara, 2023. Analyzing the Efficacy of Salvinia Molesta and Pistia Stratiotes as Phytoremediation Agent for Heavy Metals. 9^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL), 6 - 8 December 2023
4. K.G.R.R. Jayaweera, G.W.D. Premathilaka, P.D.C.I.S. Pemasiri, G.M. Kavindi, J.C. Bogahalanda, S.S.R.M.D.H.R. Wijesekara, and D.N.S. Wanniarachchi. 2023. Development of a Rating Tool on Ethical and Green Gemstones. 9^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL), 6 - 8 December 2023
5. G.M. Kavindi, S.K. Gunatilake, S.S.R.M.D.H.R. Wijesekara, and N.P.N. Shyamal. 2023. Floating Treatment Wetlands with Heliconia psittacorum for Removing Contaminants from Wastewater. 9^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL), 6 - 8 December 2023
6. K.G.R.R. Jayaweera, S.S.R.M.D.H.R. Wijesekara, E. P. Kudavidanage, S.K. Gunatilake, H.A.C.S. Hapuarachchi, Mihiran Medawela. 2023. Developing a Seedling Pot & Seed Balls Using Elephant Dung. Sri Lanka. Association for the Advancement of Science (SLAAS), 79th Annual Scientific Sessions, 12 December 2023
7. U.M.A.N. Jayathilaka, A.S.D. Sandanayaka, H.P.S. Jayasekara, S.S.R.M.D.H.R. Wijesekara, S. Malavipathirana. 2023. Chemical Compound Migration in Drinking Water Stored in Polypropylene Bottles. International Conference on Applied Sciences Sabaragamuwa University of Sri Lanka (ICAPS), 30th – 31st May 2023
8. R.M.I.T. Chandrasena, M.C.N. Jayasooriya, K.G.A.P. Jayathissa, M.G.A.N. Perera, S.S.R.M.D.H.R. Wijesekara, S.A.A.C.K. Hemachandra. 2023. Impact of Ash Plantain (Musa Paradisiaca) Corm Flour Incorporation on the Physicochemical, Biochemical and Organoleptic Properties of Low-Fat Set Yoghurt. International Conference on Applied Sciences Sabaragamuwa University of Sri Lanka (ICAPS), 30th – 31st May 2023
9. H.W.L. Fonseka, S.K. Gunatilake, J.M.C.K. Jayawardana, S.S.R.M.D.H.R. Wijesekara. 2023. Efficiency of Salvinia molesta and Pistia stratiotes in Treatment of Industrial Wastewater. International Conference on Applied Sciences Sabaragamuwa University of Sri Lanka (ICAPS), 30th – 31st May 2023
10. H.W. M. Lakshani, S.K. Gunatilake, S.S.R.M.D.H.R Wijesekara, A.K. Karunarathna. 2023. Co-Pyrolysis of Eppawala Rock Phosphate and Potassium Feldspar with Fish Waste and Rice Husk as Base Feedstock for Enhancing Nutrient Availability in Biochar. International Conference on Applied Sciences Sabaragamuwa University of Sri Lanka (ICAPS), 30th – 31st May 2023
11. E.S.M. Eswaththa, L.D. Lekamge, S.S.R.M.D.H.R. Wijesekara, and L. Siriwardhana. 2023. Quantification of Industrial Carbon Footprint and Introducing a GHG Reduction Plan for a Textile Industry in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
12. G.M. Kavindi, S.K.Gunatilake, S.S.R.M.D.H.R. Wijesekara, and N.P.N. Shyamal. 2023. Application of a Constructed Floating Wetland for Treatment of Wastewater: A Case Study in Horana Export Processing Zone in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
13. K.A.M.V. Kasthurirathna, S.S.R.M.D.H.R Wijesekara, S.K. Gunatilake, H.A.C.S. Hapuarachchi, and S.K. Lenaduwa. 2023. Pollution Assessment on E-Waste Contaminated Soil in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
14. T.D. Silva, S.S.R.M.D.H.R Wijesekara, S.K. Gunatilake, R. Dassanayake, and D. Manatunge. 2023. Synthesis of Manganese Dioxide/Reduced Graphene Oxide Nanocomposite for Oxidative Degradation of Methylene Blue. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
15. K.G.R.R. Jayaweera, S.S.R.M.D.H.R. Wijesekara, E.P. Kudavidanage, S.K. Gunatilake, H.A.C.S. Hapuarachchi, and M. Medawela. 2023. Development of a Soilless Potting Media Using Elephant Dung and its Applications. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
16. G.W.D. Premathilaka, L.D. Lekamge, and S.S.R.M.D.H.R. Wijesekara. 2023. Resource Efficient and Cleaner Production Assessment in an Apparel Industry in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
17. G. Chamanee, M. Sewwandi, S.S.R.M.D.H.R. Wijesekara, and M. Vithanage. 2023. Microplastics in Leachate Draining from Selected Landfill Sites in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
18. B.H.P.H. Peiris, R.G.U. Jayalal, and S.S.R.M.D.H.R. Wijesekara. 2023. An Assessment of Airborne Microplastic Distribution in Sri Lanka by Using Lichen. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
19. S.M. Sooriarachchi, S.K. Gunatilake, S.S.R.M.D.H.R. Wijesekara, D.N.S. Wanniarachchi, L. Jayarathne, and R.A.L.R. Amarasena. 2023. Removal of 2,5-Dichlorophenol from Air Using Zeolite Based Catalysts. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
20. S. Mayandi, H. Wijesekara, and L. Jayarathna. 2023. Analysis of Microplastics in Inflows and Outflow of Kandy Lake in Sri Lanka. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 31^st May 2023
21. M. Sewwandi, H. Wijesekara, A.U. Rajapaksha, S. Soysa, M. Vithanage. 2022. Adsorption of caffeine to microplastics in organic matter rich aqueous media. Sustainability Fair 2022. University of Petroleum Energy Studies, 11-14 October 2022
22. P.I. Wijesiriwardhana, S.K. Gunathilake, H. Wijesekara, A. Rathnayake. 2022. Utilization of Polyethylene Terephthalate Dust and Wastewater Sludge as Eco-brick Materials. Applied Sciences Undergraduate Research Symposium (APSURS), Sabaragamuwa University of Sri Lanka, 6 April 2022
23. D.M.G. Jayalath, P.D. Sandaruwan, C.P. Udawatte, D.N.S. Wanniarachch, H. Wijesekara, R.S. Diyabalanage I. Gunasekara and G. Zoysa.  A Preliminary Study to Determine the Geographic Origin of Low-Gem Quality Corundum in Sri Lanka. 11th Annual Research Sessions of Sabaragamuwa University of Sri Lanka. Faculty of Management Studies, Belihuloya, Sri Lanka, 21 December 2021
24. P.D. Sandaruwan, R.D.M.G. Jayalath, C.P. Udawatte, D.N.S. Wanniarachchi, H. Wijesekara, I. Gunasekara, R.S. Diyabalanage and G. Zoysa. Determination of the Spectrophotometric Properties of Low-Quality Gems in Sri Lanka: A Case Study from Marapana,11th Annual Research Sessions of Sabaragamuwa University of Sri Lanka. Faculty of Management studies, Belihuloya, Sri Lanka, 21 December 2021
25. M. Sewwandi, H. Wijesekara, A.U. Rajapaksha, S. Soysa, N. Nanayakkara, M. Vithanage. Implications for vector transport of polyethylene microplastics bound Pb²⁺: adsorption capacity and interaction mechanism. Young Scientists' Conference on Multidisciplinary Research (YSCMR), National Institute of Fundamental Studies, Kandy, Sri Lanka 21 October 2021
26. P.R.M. Perera, E.P. Kudavidanage, E.P.N. Udayakumara, S.S.R.M.D.H.R. Wijesekara, A.I.U.De Zoysa, N.D. Kodithuwakku, H.M.R.P. Perera. Developing a conceptual therapeutic garden for the ecosystem sector in Sri Lanka: A perception analysis. International Conference on Environmental Governance, Colombo, Sri Lanka 24-25, November 2021
27. A. Thilakshani, H. Wijesekara, N.S. Bolan, M. Vithanage. Microplastics Bound Transport of Antibiotics in Aquatic Environment. 2019 E2S2-CREATE and AIChE Waste Management Conference, CREATE Tower NUS, Singapore 11-13 March Page 35-36  
28. S.S.R.M.D.H.R. Wijesekara, N.M. Abeywickrama. Energy use and co₂ emissions reduction potential using a zero emission vehicle. The 7th international conference of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka. 14-15 November 2019.
29. P.R.M. Perera, E.P. Kudavidanage, E.P.N. Udayakumara, S.S.R.M.D.H.R. Wijesekara, A.I.U. De Zoysa, N.D. Kodithuwakku, H.M.R.P. Perera. Conservation of sri lankan medicinal planats using a noval medicinal garden concept. The 7th international conference of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka. 14-15 November 2019.
30. H Wijesekara, L Bradney, N Bolan, A U Rajapaksha, M Vithanage. Particulate plastics associated toxic trace-element transport in the environment. Association for Tropical Biology and Conservation (ATBC) – Asia-Pacific Conference, Thulhiriya, Sri Lanka, 10-13 September 2019.
31. P.R.M. Perera, E.P. Kudavidanage, E.P.N. Udayakumara, S.S.R.M.D.H.R. Wijesekara, A.I.U. De Zoysa, N.D. Kodithuwakku, H.M.R.P. Perera. Designing a sustainable eco-friendly medicinal garden: a perception based model. Association for Tropical Biology and Conservation (ATBC) – Asia-Pacific Conference, Thulhiriya, Sri Lanka, 10-13 September 2019.
32. N Bolan, L Bradney, H Wijesekara, Microplastics as a Vector for Environmental Contaminants. The 9^th International Conference on Geochemistry in the Tropics & Sub-Tropics., Crowne Plaza Surfers Paradise, Queensland, Australia, 28-31 July 2019.
33. H Wijesekara, N Bolan, L Bradney, Y Liu, A Surapaneni. 2018. Impact of particulate plastics on microbial activity in soil. 8^th Annual Research Sessions of the Sabaragamuwa University of Sri Lanka, Belihuloya, 19 December 2018.
34. L Bradney, H Wijesekara, Nanthi Bolan. 2018. Characteristics and ecotoxicity of particulate plastics in terrestrial and aquatic ecosystems. 1^st Global Cleanup Congress, Coimbatore, India. 21-25 October 2018.
35. N.S Bolan, H Wijesekara, M.Z Hossain, Y.S Ok. 2018. Soil health and food security. Asia Resilience Centre Conference, Korea University, Seoul, Republic of Korea, 26-28 November 2018.
36. H Wijesekara, N.S Bolan, R Thangavel, P Matthews, J Bennett, A Surapaneni, C Saint. The effect of biosolids application on organic carbon dynamics in soil. 21^st World Congress of Soil Science, Rio de Janeiro, Brazil 12-17 August 2018.
37. H Wijesekara, N Bolan, A Kunhikrishnan, B Seshadri, Y Liu, A Surapaneni, Y.S Ok. 2018. Modulation of contaminant toxicity by particulate plastics in relation to microbial activity in biosolids amended soil. The 2^nd International Conference on Bioresources, Energy, Environment, and Materials Technology, Gangwon Province, Korea. June 10-13, 2018.
38. H Wijesekara, N Bolan, K Kolyvas, Y.S Ok. 2018. Dynamics of carbon stocks in biosolids amended soil: A global meta-analysis. The 2^nd International Conference on Bioresources, Energy, Environment, and Materials Technology, Gangwon Province, Korea. June 10-13, 2018.
39. N Bolan, H Wijesekara, N Obadamudalige, A Kunhikrishnan, A Surapaneni, Y.S Ok. 2018. Emerging contaminants of concern in biosolids. 2^nd International Conference on Bioresources, Energy, Environment, and Materials Technology, Gangwon Province, Korea. June 10-13, 2018.
40. N Bolan, H Wijesekara, N Obadamudalige, A Kunhikrishnan, A Surapaneni, Y.S Ok. 2018. The potential value of biosolids for carbon sequestration. 2^nd International Conference on Bioresources, Energy, Environment, and Materials Technology, Gangwon Province, Korea. June 10-13, 2018.
41. N Bolan, H Wijesekara, A Kunhikrishnan, M.Z Hossain, Y.S Ok. 2018. Biochar application modulates soil health and fertility: a meta-analysis. 2^nd International Conference on Bioresources, Energy, Environment, and Materials Technology, Gangwon Province, Korea. June 10-13, 2018.
42. H Wijesekara, N Bolan, B Lutken, R Scanlon, N.L Obadamudalige, H Bowe, C Quinn, J Hindmarsh. 2018. A success of succession: Biosolids amendment in mine spoil rehabilitation and regeneration of soil. Mined Land Rehabilitation Conference, Newcastle, 12 April 2018
43. H Wijesekara, N.S Bolan, K Colyvas, P Rippon, B Seshadri, R Thangavel, Y.S Ok, Y.M Awad, A Surapaneni, C Saint, G Tian, S Torri, M Vithanage. 2017. Biosolid application enhances carbon stocks in soil. ASA-CSSA-SSSA International Annual Meeting, Tampa, Florida, USA, 22-25 October 2017
44. H Wijesekara, N.S Bolan, B Seshadri, Y.S Ok, Y.M Awad, A Surapaneni, C Saint. 2016. Biosolids application enhances soil carbon sequestration: A Meta-Analysis. NZASSS Conference, Queenstown, New Zealand, 12-16 December 2016.
45. N Bolan, S Mandal, H Wijesekara, Y Xu, R Karunanithi, F Qi, A Kunhikrishnan, B Seshadri. 2016. Biochar-nutrient Interactions in Soil, Asia Pacific Biochar Conference, Kangwon National University, Chuncheon, Gangwon Province, Korea. 19-23 October 2016.
46. H Wijesekara, N.S Bolan, B. Seshadri, Y.S. Ok, Y.M. Awad, A. Surapaneni, C. Saint. 2016. Quantification of biosolids application on soil organic carbon dynamics: A Meta-Analysis.SETAC-AU Conference, Hobart 4-7 October 2016.
47. H Wijesekara, N.S. Bolan, B. Seshadri, Y.S. Ok, Y.M. Awad, A. Surapaneni, C. Saint. (2016) The Land Application of Biosolids on Soil Carbon Sequestration in Mined Lands: A Meta-Analysis, 6^th Annual Mined Land Rehabilitation Conference at Singleton Civic Centre, Singleton, Australia, 7 April 2016.
48. H Wijesekara, N.S Bolan, N Khan, A Surapaneni, C Saint. 2015. Sequestration of carbon in sandy soils-a ‘direct action’ tool in mitigating climate change. Smart Future Cities 2015 at Newcastle City Hall, Newcastle, Australia, 1-3 October 2015.
49. V Jayaweera, H Wijesekara, S Wijebahu, P Kumarathilaka, I.R.M Kottegoda, S.R.D Rosa, M Vithanage. 2015. Starch coated nano-zero valent iron decorated graphene composite for Chromium (VI) removal from aqueous solution. 4^th Nano Today conference, Dubai. 6-10 December 2015.
50. M Vithanage, S.S.R.M.D.H.R Wijesekara, S.M.P.R Kumarathilaka, K Kawamoto, B.F.A Basnayake. 2014. Volatile organic compounds (VOCs) in the Gohagoda municipal solid waste landfill leachate, Sri Lanka. The International Conference on Contaminated Land, Ecological Assessment and Remediation (CLEAR 2014), Chuncheon, South Korea, 5-8 October 2014.
51. M.T.V.P Jayaweera, S.S.R.M.D.H.R Wijesekara, M Vithanage, I.R.M Kottegoda, S.R.D Rosa. 2014. Synthesis and characterization of nanoparticulate zero valent iron-graphene composite. International Conference on Nanoscience and Nanotechnology (ICNSNT), Colombo, Sri Lanka, 12-13 August 2014.
52. S.S.R.M.D.H.R Wijesekara, I.G.J.C Harischandra, S.M.P.R Kumarathilaka, M Vithanage. 2014. Fate and transport of selected nutrients and heavy metals in nanoscale zero valent iron amended sand columns. Peradeniya University International Research Sessions (iPURSE), 4-5 July 2014.
53. K.H.T.D Kumarasinghe, S.S.R.M.D.H.R Wijesekara, M Vithanage. 2014. Starch stabilized zero valent iron nanoparticles on catechol remediation in aqueous media. Peradeniya University International Research Sessions (iPURSE), 4-5 July 2014.
54. I.N.K Darandakumbura, A.R Siriwardana, S.S.R.M.D.H.R Wijesekara, M Vithanage, B.F.A Basnayake. 2014. Humic substances in landfill leachate and its removal using nanoscale zero valent iron, Peradeniya University International Research Sessions (iPURSE), 4-5 July 2014.
55. S.S.R.M.D.H.R Wijesekara, M Vithanage. 2012. Synthesis and characterization of air stable Zero-valent Iron nanoparticles by different stabilizing agents. The First International Conference on Emerging Technologies. Indian Institute of Technology, Chennai, 14-16 September 2012.
56. M Vithanage, S.S.R.M.D.H.R Wijesekara, I.P.L Jayarathna. 2012. Nanomaterials for landfill leachate treatment: The Sri Lankan perspective. The 1^st International Conference on Emerging Technologies. Indian Institute of Technology, Chennai, 14-16 September 2012.
57. S.S.R.M.D.H.R Wijesekara, B.F.A Basnayake, M Vithanage. 2012. Laboratory investigations of stabilized nano scale zero valent iron for the treatment of landfill leachate in the tropics. National Nanotechnology conference on Nanoscience and Nanotechnology in Sri Lanka: from science to commercialization, (ISBN 978-955-590-110-9), 22-23 August 2012. (http://dl.nsf.ac.lk/bitstream/1/9350/1/5.%20Hasanthi%20Wijesekara.pdf)
58. S.S.R.M.D.H.R Wijesekara, M Vithanage, B.G.N Sewwandi, N.D Silva, B.F.A Basnayake. 2012. Contamination of wetlands through transport of pollutants generated from the municipal solid waste open dumpsite, Kandy, Sri Lanka. Japan Geoscience Union, 20-25 May 2012.
59. M Vithanage, S.S.R.M.D.H.R Wijesekara, K Dideriksen, B.F.A Basnayake, S.L.S Stipp. 2012.  Application of organic compound treated nanoscale zero valent iron for remediation of COD and dissolved metal from landfill leachate in the humid tropics. The 6^th Pacific Basin Conference on Adsorption Science and Technology, Taiwan, 20-23 May 2012.
60. S.S.R.M.D.H.R Wijesekara, K Mahatantila, D.R.M.R.D.P Eheliyagoda, S.S Mayakaduwa, B.F.A Basnayake, M Vithanage. 2012. Fate and transport of pollutants generated from the Gohagoda open dumpsite, Kandy, Sri Lanka. International symposium on water quality and human health: challenges ahead. Postgraduate Institute of Science (PGIS), University of Peradeniya, Sri Lanka, 22-23 March 2012. (http://www.pgis.lk/watersym/docs/proceedings_2012.pdf)
61. N.D Silva, S.S.R.M.D.H.R Wijesekara, B.F.A Basnayake, M Vithanage. 2012. Application of Geophysical tools for ground investigation and characterization, Gohagoda open dumpsite, Kandy. GSSL Annual Symposium, 24 February 2012. (http://www.gsslweb.org/home/files/Technical%20Sessions-12.pdf)
62. A.U Rajapaksha, M Vithanage, H Wijesekara, M Ahmad, Y.S Ok. 2011. Efficacy of soybean stover-derived biochar for the removal of arsenic and antimony from aqueous solutions. The 1^st International Symposium on Biochar, Kangwon National University, Korea, 8-9 December 2011. (http://www.biochar-international.org/sites/default/files/Proceeding%20Book_Korea.pdf)
63. S.S.R.M.D.H.R Wijesekara, R.M.A.U Rajapaksha, I.P.L Jayarathne, M Vithanage, B.F.A Basnayake. 2011. Toxic metals in soils contaminated by landfill leachate in Gohagoda dumpsite, Kandy, Sri Lanka. GSSL Annual Symposium, Kandy, 25-26 February 2011.
64. H.A.J Kumara, S.S.R.M.D.H.R Wijesekara, R.M.A.U Rajapaksha, I.P.L Jayarathna, A.L.T Hewawasam, M Vithanage. 2011. Fractionation and availability of heavy metals in Ratnapura gem bearing alluvium. GSSL Annual Symposium, Kandy, 25-26 February 2011.
65. S.S.R.M.D.H.R Wijesekara, R.M.A.U Rajapaksha, I.P.L Jayarathne, B.F.A Basnayake, M Vithanage. 2011. The temporal variation of landfill leachate quality at Gohagoda dumpsite. International Forestry and Environment Symposium. University of Sri Jayewardenepura, Nugegoda, Sri Lanka, 2011 (ISSN: 2235-9427).
66. M.S Vithanage, J.K Hettiarachchi, A.U Rajapaksha, H Wijesekara, T. Hewawasam. 2011. Heavy metals in Ratnapura alluvial gem sediments, Sri Lanka. American Geophysical Union Fall Meeting, San Francisco, California, USA, 5-9 December 2011. (http://adsabs.harvard.edu/abs/2011AGUFM.V13D2633V)
67. S.S.R.M.D.H.R Wijesekara, A.C Shamendra, W.W.C.K Chandrasekara, S.K     Gunathilake, B.F.A Basnayake. 2010. Design and Evaluation of a Hydrolytic Phase Domestic Biogas Reactor. Mini symposium, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, 2010.
68. S.S.R.M.D.H.R Wijesekara, R.T.K Ariyawansha, N Madanayake, W.W.C.K Chandrasekara, B.F.A Basnayake. 2010. Determination of pseudo natural attenuation of leachate emission from Gohagoda dumpsite in Kandy. Third International Symposium (InSym 2010). Sabaragamuwa University of Sri Lanka, Belihuloya, 2010.
69. A.C Shamendra, S.S.R.M.D.H.R Wijesekara, W.W.C.K Chandrasekara, S.K Gunathilake, B.F.A Basnayake. 2010. Modification and evaluation of the up-flow methanogenic phase reactor for domestic biogas plant. Third International Symposium (InSym 2010). Sabaragamuwa University of Sri Lanka, Belihuloya, 2010 (ISSN: 1800-4407).
70. S.S.R.M.D.H.R Wijesekara, A.C Shamendra, J.M.C.K Jayawardana, N Premathilaka. 2009. The Leachate Quality Analysis for Compost Producing Solid Waste Management Plant.  Environmental Sciences and Natural Resources Management National Symposium (NRM 2009). Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, 2009.

Gold medal for publications in Top-tier (Q1) journals Sabaragamuwa University (2024)

Best Researcher of the Faculty of Applied Sciences, Sabaragamuwa University (2023)

Most Cited Researcher of the Sabaragamuwa University (2022)

Best Young Researcher of the Sabaragamuwa University (2021)

Soil Science Society of Australia Travel Scholarship for attending the 21^st World Congress of Soil Science, Rio de Janeiro, Brazil (2018)

Teaching Excellence and Contribution to Student Learning Group Award, The University of Newcastle, Australia (2017)

Higher Degree by Research Conference Scholarship by the Faculty of Science, The University of Newcastle, Australia for attending the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America International Annual Meeting, Tampa, USA (2017)

Runner-Up, ATA Scientific Young Scientist Encouragement Award, Australia (2017)

The Second Best Poster Presentation, 7^th Annual Mine Rehab conference, Muswellbrook, New South Wales, Sydney, Australia (2017)

NSW Soil Science Society Travel Scholarship for attending the New Zealand and Australia Soil Science Societies’ joint conference, Queenstown, New Zealand (2016)

President’s Award for Scientific publications, Sri Lanka (2016)

Higher Degree Research Development Award, The University of Newcastle, Australia (2016)

International Postgraduate Research Scholarship, The University of Newcastle, Australia (2015)

NRC Merit Award for Scientific Publications, Sri Lanka (2015)

CRC CARE Travel Scholarship to attend Cleanup Conference, Melbourne, Australia (2015 and 2017)

International President’s Scholarship for PhD studies at the University of South Australia (2014)

The Best Research Paper in Poster Presentation Session, PGIA Annual Congress, University of Peradeniya, Sri Lanka (2010)

Open Scholarship from the University Grants Commission, Sri Lanka for B.Sc Special Degree in Environmental Sciences and Natural Resources Management, Sabaragamuwa University (2005-2010)

A method of synthesizing organic stabilized nano-particulate zero-valent iron. 2020. M.S Vithanage and S.S.R.M.D.H.R. Wijesekara. LK/P/1/17302. 

Editorial

• Guest Editor – Special Issue: Solid Waste: Environmental Resilience and Remediation, Sustainability Journal Impact Factor 3.251 (2021)
• Editorial Board – Carbon Research, Springer https://www.springer.com/journal/44246/editors
• Co-Editor – Thematic Publication – 2013, Young Scientists Forum, National Science and Technology Commission, Sri Lanka

Reviewer for International Journals

• Journal of Environmental Quality
• Water Research
• Environment International
• Science of The Total Environment
• Environmental Geochemistry and Health
• Journal of King Saud University – Science
• Environmental Science and Pollution Research
• Chemosphere
• Tropical Conservation Science
• Process Safety and Environmental Protection
• Biochar
• Toxics
• Korean Journal of Chemical Engineering
• Marine Pollution Bulletin
• Adsorption Science and Technology 
• Air Quality, Atmosphere & Health
• Minerals 
• Soli and Tillage Research
• Applied Vegetation Science
• Environmental Science: Processes & Impacts
• Life
• Soil Systems
• Forests
• Journal of Marine and Island Cultures

Reviewer for Local Journals

• Sabaragamuwa University Journal
• Journal of the University of Ruhuna