Concentration and pollution assessment of heavy metals within surface sediments of the Raohe Basin, China.

作者： Jin Wei , Maoqing Duan , Yiping Li , Amechi S. Nwankwegu , Yong Ji

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摘要: Surface sediment samples were collected from four areas (the Jingdezhen Industrialized Area (JDZ), Upstream (UP), the Dexing Mining (DX), and Downstream (DM)) to investigate concentration chemical composition of heavy metals. The sediments analysed for Cu, Zn, Pb, Cd, Cr, As, Ni using a sequential extraction scheme according improved BCR (European Community Bureau Reference) method. obtained results show that maximum values Cu (793.52 μg·g−1), Zn (72.09 μg·g−1), Pb (222.19 μg·g−1), Cd (1.60 μg·g−1) DX sampling area, while JDZ area had highest concentrations Cr (97.09 μg·g−1), As (318.05 μg·g−1), (66.35 μg·g−1). majority metal far exceeded their corresponding background values. risk analysis geo-accumulation index (Igeo) indicated metals main pollution factors each element degree followed order of: Cu > As > Pb > Cd > Cr > Zn. Metal partitioning characteristics also considered more than 80% potential bioavailability toxic effects.

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Concentration and pollution assessment of heavy metals within surface sediments of the Raohe Basin, China.

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Concentration and pollution assessment of heavy metals within surface sediments of the Raohe Basin, China.

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