| Speciation and potential remobilization of heavy metals in sediments of the Taihu Lake, China |
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| 作者姓名： | YUAN Xuyin DENG Xu SHEN Zhiyong GAO Yun |
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| 作者单位： | YUAN Xuyin1，2*，DENG Xu1，2，SHEN Zhiyong2，and GAO Yun2 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering，Nanjing 210098，China 2 College of Environmental Sciences and Engineering，Hohai University，Nanjing 210098，China |
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| 基金项目： | Acknowledgements The authors wish to thank Prof. Zheng Xiangmin and Dr. Tao Yuxiang for their help with sample collection. This project is financially supported jointly by Bureau of Science and Technology, Jiangsu Province, and China Geological Survey （BK2001189, J4.2.1-4）. |
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| 摘 要： | The species of Cu, Pb, Zn, Cd and Cr in sediments of the Taihu Lake, China, have been analyzed using the sequential chemical extraction method. Variations in the chemical fractions of these metals and their geographic distributions have also been studied. For all five metals, the residual fraction is highest but the exchangeable fraction is lowest among all the fractions. Compared to other metals, Cd has the highest percentage in the exchangeable fraction, and Cr is associated mainly with the residual fraction. Cu in the organic fraction and Pb in the Fe-Mn fraction are the important species, whereas the lowest percentages are found for Cd in the organic fraction, Cu in the Fe-Mn oxide fraction and Pb in the carbonate fraction. With respect to spatial differences, the total contents in the non-residual fractions of the metals in bay sediments are found to be higher than those in other sediments. The fractions of Cd, Cu and Cr showed significant variations in different regions. The fractions of Pb and Zn, however, did not show significant variations in spatial distribution, suggesting different amounts and different paths of anthropogenic input for the metals. Comparisons of the metal speciation indicated that Cd might be the most bioavailable metal, followed by Pb.
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| 关 键 词： | 重金属 沉积物 物种形成 太湖 中国 |
| 收稿时间： | 15 March 2006 |
| 修稿时间： | 2006-03-15 |
Speciation and potential remobilization of heavy metals in sediments of the Taihu Lake,China |
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| YUAN Xuyin DENG Xu SHEN Zhiyong GAO Yun.Speciation and potential remobilization of heavy metals in sediments of the Taihu Lake, China[J].Chinese Journal of Geochemistry,2007,26(4):384-393. |
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| Authors: | Yuan Xuyin Deng Xu Shen Zhiyong Gao Yun |
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| Institution: | (1) State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, 210098, China;(2) College of Environmental Sciences and Engineering, Hohai University, Nanjing, 210098, China |
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| Abstract: | The species of Cu, Pb, Zn, Cd and Cr in sediments of the Taihu Lake, China, have been analyzed using the sequential chemical extraction method. Variations in the chemical fractions of these metals and their geographic distributions have also been studied. For all five metals, the residual fraction is highest but the exchangeable fraction is lowest among all the fractions. Compared to other metals, Cd has the highest percentage in the exchangeable fraction, and Cr is associated mainly with the residual fraction. Cu in the organic fraction and Pb in the Fe-Mn fraction are the important species, whereas the lowest percentages are found for Cd in the organic fraction, Cu in the Fe-Mn oxide fraction and Pb in the carbonate fraction. With respect to spatial differences, the total contents in the non-residual fractions of the metals in bay sediments are found to be higher than those in other sediments. The fractions of Cd, Cu and Cr showed significant variations in different regions. The fractions of Pb and Zn, however, did not show significant variations in spatial distribution, suggesting different amounts and different paths of anthropogenic input for the metals. Comparisons of the metal speciation indicated that Cd might be the most bioavailable metal, followed by Pb. |
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| Keywords: | heavy metal sediment speciation Taihu Lake China |
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