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Jiang, X.* ; Martens, D. ; Schramm, K.-W. ; Kettrup, A. ; Xu, S.F.* ; Wang, L.S.*

Polychlorinated organic compounds (PCOCs) in waters, suspended solids and sediments of the Yangtse River.

Chemosphere 41, 901-905 (2000)

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Open Access Gold as soon as Publ. Version/Full Text is submitted to ZB.

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The contamination levels of polychlorinated organic compounds (PCOCs) in waters, suspended solids and sediments of the Yangtse River (Nanjing part) were analyzed in this paper. Their concentrations determined by GC/MS were very low in comparison with those in European River. The average concentration of total HCH (α-HCH, β-HCH, γ-HCH) was much higher than that of other PCOCs in all waters, which made up 65% of total amount of PCOCs. Due to the complete dilution and mixture of pollutants in the mighty Yangtse River, the content of PCOCs at each sampling station demonstrated very similar spatial pattern for waters and suspended solids. Since the small suspended solid (<0.7 μm) passed through the filter was also considered as dissolved part, the dominant parts of HCHs, PCA and PCBs were found in dissolved phase with percentage proportion of 85–94%, 72–85% and 61–78%, respectively. For DDTs, HCB and PeCB, their contents in dissolved phase were slightly higher than in particulate phase. The contents of PCOCs in sediments were also very low and varied with high fluctuation at different sampling points, indicating the heterogeneous deposition. HCB and its metabolite (PeCB) presented the highest contamination levels among PCOCs in sediments.

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