http://dr.lib.sjp.ac.lk/handle/123456789/1806 2026-04-23T10:44:49Z 2026-04-23T10:44:49Z Yuan, Y Bolan, N Vithanage, M Biswas, J.K http://dr.lib.sjp.ac.lk/handle/123456789/9100 2020-08-28T09:56:09Z 2017-01-01T00:00:00Z

Applications of biochar in redox-mediated reactions Yuan, Y; Bolan, N; Vithanage, M; Biswas, J.K Biochar is chemically more reduced and reactive than the original feedstock biomass. Graphite regions, functional groups, and redox-active metals in biochar contribute to its redox characteristics. While the functional groups such as phenolic species in biochar are the main electron donating moieties (i.e., reducers), the quinones and polycondensed aromatic functional groups are the components accepting electrons (oxidants). The redox capacity of biochar depends on feedstock properties and pyrolysis conditions. This paper aims to review and summarize the various synthesis techniques for biochars and the methods for probing their redox characteristics. We review the abiotic and microbial applications of biochars as electron donors, electron acceptors, or electron shuttles for pollutant degradation, metal(loid)s (im)mobilization, nutrient transformation, and discuss the underlying mechanisms. Furthermore, knowledge gaps that exist in the exploration and differentiation of the electron transfer mechanisms involving biochars are also identified.

2017-01-01T00:00:00Z Wijekoon, P Wickramasinghe, C Athapattu, B.C.L Vithanage, M http://dr.lib.sjp.ac.lk/handle/123456789/9099 2020-08-28T08:47:02Z 2020-01-01T00:00:00Z

Biomass valorization and phytoremediation as integrated Technology for Municipal Solid Waste Management for developing economic context Wijekoon, P; Wickramasinghe, C; Athapattu, B.C.L; Vithanage, M Municipal solid waste (MSW) has ranked among the most detrimental global issues of the decade, where it has been induced by the population trends, urbanization, and economic growth. The majority of conventional pollution treatment methods involve high capital and maintenance costs with sophisticated instruments and technology. Biomass valorization and phytoremediation has been described to be an effective and practicable alternative for expensive, conventional engineering techniques in managing MSW and remediating contamination. Modern biomass valorization methods are promising technologies that provide effective MSWreduction, at the same time providing measures for removing pollutants from leachate with its particular focus on biochar, which is resulted by torrefaction of the perishable waste. The simultaneous ability of phytoremediation to remove many types of contaminants in leachate by significant amounts is emphasized in the context with considerations to the challenges in the sector. Phytoremediation is limited by several factors such as contaminant specificity, time consumption, and some external factors, while biochar applications are limited due to substrate specificity. The study aimed to review scientific literature to provide a platform for biomass valorization and phytoremediation integration for developing economy context.

2020-01-01T00:00:00Z Weerasundara, L Mahatantila, K Vithanage, M http://dr.lib.sjp.ac.lk/handle/123456789/9098 2020-08-28T08:43:26Z 2020-01-01T00:00:00Z

E-waste as a challenge for public and ecosystem health Weerasundara, L; Mahatantila, K; Vithanage, M

2020-01-01T00:00:00Z Wathukarage, A Herath, I Iqbal, M.C.M Vithanage, M http://dr.lib.sjp.ac.lk/handle/123456789/9097 2020-08-28T08:40:55Z 2017-01-01T00:00:00Z

Mechanistic understanding of crystal violet dye sorption by woody biochar: implications for wastewater treatment Wathukarage, A; Herath, I; Iqbal, M.C.M; Vithanage, M

2017-01-01T00:00:00Z