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- W2365125637 abstract "Congener specific analysis of PCBs in two sediments of the Pearl River are conducted to gain better understanding of the distribution of this class of contaminants in relation to the grain size of sediments. PCB concentrations, TOC, black carbon and their distribution profiles are studied in five different grain size sediment fractions ( 500 μm, 500～220 μm, 220～63 μm, 63～220 μm, 22 μm). The compositions of different grain size particles are identified through petrography analysis to study the relationship between the PCBs concentrations and the compositions of minerals and organic matter in different grain size particles. The results show that the total PCB concentration is not significantly correlated with the TOC and black carbon content. The results show preferential association of low chlorinated congeners with the fraction ( 22 μm) which is rich in amorphous organic matter, however, the specific affinity of highly chlorinated congeners with the fraction (63～220 μm) which is abundant of coal derived matter and coke carbon particles. It is illustrated that the type of organic matter plays an important role in the distribution of total PCBs and PCB congeners with different number of chlorine atoms in different grain size particles in sediments." @default.
- W2365125637 created "2016-06-24" @default.
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- W2365125637 date "2003-01-01" @default.
- W2365125637 modified "2023-09-24" @default.
- W2365125637 title "Grain-size distribution of polychlorobiphenyls in sediments of the Pearl River" @default.
- W2365125637 hasPublicationYear "2003" @default.
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