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Spatial distribution of Cd and Cu in soils in Shenyang Zhangshi Irrigation Area(SZIA),China

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第3期9卷 271-278页

作者： Li-na SUN Xiao-bo YANG Wen-qing WANG Li MA Su CHEN Key Laboratory of Eco-Remediation of Contaminated Environment and Resourcilization Technology Shenyang University Shenyang 110044 China Liaoning Geology Academe Shenyang 110032 China

Heavy metal contamination of soils,derived from sewage irrigation,mining and inappropriate utilization of various agrochemicals and pesticides,and so on,has been of wide concern in the last several *** Shenyang Zhangshi Irrigation Area(SZIA) in China is a representative area of heavy metal contamination of soils resulting from sewage irrigation for about 30 *** study investigated the spatial distribution and temporal variation of soil cadmium(Cd) and copper(Cu) contamination in the *** soil samples were collected from the SZIA in 1990 and 2004;Cd and Cu in soils was analyzed and then the spatial distribution and temporal variation of Cd and Cu in soils were modeled using Kriging *** results show that long-term sewage irrigation had caused serious Cd and Cu contamination in *** mean and the maximum of soil Cd are markedly higher than the levels in second grade standard soil(LSGSS) in China,and the maximum of soil Cu is close to the LSGSS in China in 2004 and is more than the LSGSS in China in *** contamination magnitude of soil Cd and the soil extent of Cd contamination had evidently increased since sewage irrigation ceased in *** contamination magnitude of soil Cu and the soil extent of Cu contamination had evidently increased in topsoil,but obviously decresed in *** soil contamination of Cd and Cu was mainly related to Cd and Cu reactivation of contaminated sediments in Shenyang Xi River and the import of Cd and Cu during *** eluviation of Cd and Cu in contaminated topsoil with rainfall and irrigation water was another factor of temporal-spatial variability of Cd and Cu contamination in soils.

关键词： Cadmium (Cd) Copper (Cu) contamination of soils Spatial distribution Shenyang Zhangshi Irrigation Area (SZLA)

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