出版社：Korean Society of Environmental Health and Toxicology
摘要：Leachate from municipal solid waste (MSW) landfill,effluent from leachate treatment plant,and ground water sample from a monitoring well near landfill site were tested for an acute toxicity. Microtox toxicity test was used for testing the acute toxicity of leachate and other samples. EX、！ values which a concentration of pollutant for reducing 50% light output from luminescent bacteria. Photobacterium phosphoreum were determined to assess the toxicity of pollutants as well as the relative toxicity. In addition,characteristics of leachate were studied and compared to those of phenol and pentachlorophenol (PCP) which are lypical aquatic toxic pollutants. For leachate,EC대 for 30 min incubation was in. 8%. while for pheno】 and PCP. 46 ppm and 1.2 ppm. respectively,the relative toxicity of treated leachate by in situ aeration with activated sludge was reduced to more than 75% of toxicity of the untreated leachate. Microtox toxicity test was failed to figure out EC^ values for groundwater from a monitoring well since the relative toxicity of the unconcentrated sample was too low to estimate EC_. Addition of activated carbon to leachate was reduced the relative toxicity. The reduction Pattern of the relative toxicity of leachate by mechanical aeration was similar to that of PCP,but different from that of phenol. These findings suf^est that the toxicity of 】eachate may come from PCP-like toxic compounds rather than phenol-like one. In conclusion,the process of aeration with activated sludge mi^ht be very important to reduce the environmental toxicity of leachate. And Microtox test could be a reasonable bioas&ay for screening and monitoring the environmental toxicity of leachate from municipal solid waste landfill as well as for determining the reduction efficiency of the leachate toxicity by various treatment processes in leachate treatment plant.
