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The concentrations of PCDD/Fs in sediment, soil, fish and shrimp samples from a Japanese freshwater lake area were measured 2,3,7,8-Substituted compounds were separated using two GC stationary phases. According to the isomeric examination of TCDDs and TCDFs, the herbicide CNP was suggested to be one of the sources of PCDD/Fs in this area and the presence of another source was also suggested. The...
Aquatic toxicity of point-source discharges are examined with the MICROTOX system using luminescent bacteria, Photobacterium phosphoreum. Samples include treated wastewaters from industrial dischargers, municipal sewage treatment plants and community sewage treatment plants, all of which eventually flow into Tokyo Bay. Among 34 samples from industry, 11.7% exhibit high toxicity (EC50 =< 0.2),...
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