Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China

查看全文 作　　者：Shouliang [1]Huo;Jingtian [1]Zhang;Kevin [2]M.Yeager;Beidou [1]Xi;Yanwen [1]Qin;Zhuoshi [1]He;Fengchang [1]Wu

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science;[2]Department Earth and Environmental Sciences, University of Kentucky

出　　处：《Journal of Environmental Sciences》索引2015年第27卷第5期,共11页

基　　金：supported by the Mega-projects of Science Research for Water Environment Improvement (No. 2012ZX07101-002);the National Natural Science Foundation of China (No. 41303085) 摘　　要：The technique of DGT(diffusive gradients in thin films) using three diffusive gel thicknesses was applied to estimate the mobility and bioavailability of heavy metals in sediments and porewater of Lake Taihu, China. The DGT results showed significantly positive correlations between Co, Pb, Cd and Mn, and Ni and Fe concentrations in porewater. Cu and Zn showed a significantly negative correlation with Mn, due to Cu combination with carbonates and Zn derived from agricultural pollution, respectively. The rank order of average concentrations of Co, Ni and Cd at each station was DGT1.92>DGT0.78> DGT0.39, suggesting stronger resupply from sediments to porewater when using thicker diffusive gels. Comparing centrifugation and DGT measurements, Co, Ni and Cd are highly labile; Mn and Fe are moderately labile; and Cu, Zn and Pb are slightly labile. The variations of AVS concentrations in sediment cores indicate that metal sulfides in deeper layers are easily diffused into surface sediments. 关键词：金属硫化物沉积物富营养化湖泊重金属流动太湖中国浅水

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Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China

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