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Investigation of Zinc removal capacities of different sorbent materials to be used in constructed wetlands

Show simple item record Witharana, A Jayaweera, M Manatunge, JMA 2017-01-25T09:19:16Z 2017-01-25T09:19:16Z
dc.description.abstract It has been found over the past couple of years that health hazards associated with heavy metals have been on the rise, particularly the chronic diseases. Lack of tertiary treatment of wastewater may have contributed to this emergent problem, mainly due to the high costs involved in the removal of heavy metals. Constructed wetlands have therefore received great attention as a tertiary treatment method or a polishing technique of wastewater due to its low construction and operation costs. However, finding a low-cost sorbent material to be used as the wetland filter material, which can be used as an alternative to activated carbon, has been a problem for decades. Therefore, the present study focuses on applicability of low-cost sorbent materials: viz., clay tile, brick, saw dust and rice husks, as filter mediums. Laboratory-scale experiments were performed with a synthetic Zinc solution. Results revealed that clay tile material has the highest adsorption capacity (47.6 mg/g) and removal efficiency, (98%), while brick (37.0 mg/g, 86%), sawdust (20.4 mg/g, 80%) and rice husks (15.8 mg/g, 64%) have relatively low adsorption capacities and removal efficiencies, respectively. The separation factor of equilibrium (RL) indicates favourable isotherms (0< RL<1) for all tested sorbent materials. Among the studied materials clay tile, brick and rice husks are good adsorbents for Zinc (n>2) while sawdust is a moderately difficult material for adsorption of Zinc (n <2). en_US
dc.language.iso en en_US
dc.subject adsorption isotherms, constructed wetlands, sorbent material, Zinc en_US
dc.title Investigation of Zinc removal capacities of different sorbent materials to be used in constructed wetlands en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2010 en_US
dc.identifier.conference 15th International Forestry and Environment Symposium en_US University of Sri Jayewardenepura en_US
dc.identifier.pgnos pp. 18 - 24 en_US en_US

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