DECHLORANE PLUS IN FISH FROM URBAN-INDUSTRIAL RIVERS

摘要

The chlorinated flame retardant, Dechlorane Plus (DP), was measured in fish samples collected in 2008 from 22 river sites across Korea. Concentrations of the DP isomers ranged from 0.61 to 126 ng/g lipid, with a mean concentration of 24.5 ng/g lipid, which was relatively higher than those of the Great Lakes. The relatively high concentrations of DP in fish samples provided the DP isomers were bioavailable and bioaccumulative regardless of their high molecular weight and high log Kow value. The mean DP concentrations of 15 urban sites (36.1 ± 35.3 ng/g lipid) were about 25 times greater than those measured in 7 rural sites (1.4 ± 1.0 ng/g lipid). The results suggested that DP exposure of fish is related to urbanization activity, and specific industrialized urban areas could be significant source regions of DP, even if without a DP manufacturing facility in Korea. The mean fanti value for the entire samples was 0.69 ± 0.054, and the mean fanti value for urban samples (0.67 ± 0.060) was significantly lower than those of technical DP standard (0.75) (p=0.032). This observation suggests the different bioavailablity of the DP isomers and enrichment of syn-DP isomer in fish samples.