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Investigation of potential impacts on ground and surface water due to Galle municipal council dumpsite

Show simple item record Ruwan, KDB Rathnayaka, RMASK Dayanthi, WKCN Edirisinghe, DD Priyankara, NH 2013-11-12T19:28:14Z 2013-11-12T19:28:14Z 2013-11-13
dc.description.abstract Open dumpsites are the widely used practice in Sri Lanka for disposal of unsorted solid waste. Waste management of Galle Municipal Council (GMC) area has been done by the municipal council. Solid waste generated in the GMC area is collected by the GMC, and a small portion of biodegradable waste is used to produce compost. Rest of the waste is disposed on a semi-controlled dumpsite. Gin river is flowing by the side of the dumpsite. Therefore controls and precautionary measures are needed at this dumpsite because it is likely to generate highly contaminated leachate which may be a threat to Gin river and surrounding groundwater. The aim of this study was to investigate the potential impacts caused by the GMC dumpsite - leachate on Gin river water and surrounding groundwater. There were about 72 % of volatile solids reduction in the solid waste dumped for 8 years at the dumpsite as compared with the fresh solids wastes. This indicates the biodegradation of dumped solid waste. Therefore it is highly possible that leachate from this site is rich in organic matter. The reduction in electrical conductivity shows that the possible dissolution of ionized solids which were initially present with solid waste, into soil water. The leachate was found to have exceeded effluent discharge standards for the parameters such as biochemical oxygen demand (BOD5), chemical oxygen demand (COD), turbidity, total suspended solids (TSS), ammonium-nitrogen (NH4+ - N) , orthophosphate, selenium (Se), arsenic (As), chromium (Cr) and ferrous (Fe). Chloride (Cl-), COD and turbidity values of the ground water sample were higher than the highest desirable standard levels for drinking purpose. Arsenic (As) and selenium (Se) exceeded the maximum permissible levels of drinking water standards. „Se‟ concentration in leachate, Gin river water and groundwater was extremely high. The mean concentrations of BOD5, COD, turbidity, Cl-, conductivity, „Se‟ and „Cr‟ of the portion of Gin river which is in the immediate vicinity to the dumpsite exceeded the ambient water quality standards. The study revealed that the leachate from the dumpsite has adversely affected the surrounding ground and surface water. en_US
dc.language.iso en en_US
dc.subject Galle Municipal Council dumpsite en_US
dc.subject leachate en_US
dc.subject water quality parameters en_US
dc.subject Gin river en_US
dc.subject groundwater en_US
dc.title Investigation of potential impacts on ground and surface water due to Galle municipal council dumpsite en_US
dc.type Conference-Full-text en_US
dc.identifier.year 2012 en_US
dc.identifier.conference ICSBE-2012: International Conference on Sustainable Built Environment en_US Kandy, Sri Lanka en_US en_US en_US en_US en_US en_US

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