| Enrichment and mobility of cadmium and other heavy metals in the area of the Three-Gorges Reservoir |
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| 作者姓名： | Jiang TANG Yong LI Jiali LEI Shijie WANG Tangfu XIAO |
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| 作者单位： | [1]State Key Laboratory of Environmental Geochemistrz, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China [2]Institute of Earth Science, Chengdu University of Technology, Chengdu 610059, China [3]Geological Survey of Southeast Sichuan, Chongqing 400033, China |
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| 摘 要： | This study focused on the geochemical distribution patterns and ecological effects of Cd and other heavy metals such as As, Hg, Cr, Cu, Ni, Pb, and Zn in rock, soil, water, sediment and crops in the area of the Three-Gorges Reservoir within Chongqing, and aimed at the protection of ecological environment and rational application of the local lands. This study found that the metals of Cd, Hg and Pb presented pollution in the surface environment along the Yangtze River, that is Cd〉Hg〉Pb （Cu）〉Zn〉As〉Ni〉Cr. The pollution of Cd in sediment was mainly attributable to the regional black shales, and partly to the urban sewage and garbage. The geochemical modes of metals in the sediment varied. Cr, Hg, Ni, and Pb mainly existed as residues, and Cd as carbonate. Cd exited as a high proportion in the modes of ion-exchange, carbonate, and iron-manganese oxidation, up to 63 percent. The contents of heavy metals in soiland sediment were correlated to the host clay minerals, such as illite, montmorillonite, kaolinite and chlorite. It is shown that Cd was transported with clay minerals in the Yangtze River over long distance and formed the regional anomaly. In the abnormal area of Jianping in Wushan County, higher Cd contents are reported in the local crops and local villagers＇ hairs than from the background areas.
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| 关 键 词： | 镉 重金属 地球化学 生态效应 三峡工程 迁移率 |
Enrichment and mobility of cadmium and other heavy metals in the area of the Three-Gorges Reservoir |
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| Jiang TANG Yong LI Jiali LEI Shijie WANG Tangfu XIAO.Enrichment and mobility of cadmium and other heavy metals in the area of the Three-Gorges Reservoir[J].Chinese Journal of Geochemistry,2006,25(B08):122-123. |
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| Abstract: | |
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| Keywords: | cadmium heavy metal geochemical pattern ecological impact Three-Gorges Reservoir |
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