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《Arid Zone Research》 2008-05
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Investigation and Assessment on Heavy Metal Pollution of Farming Soil in the Jinghe River Basin

ZHENG Guo-zhang1,2(1.College of Urban and Environmental Sciences,Shanxi Normal University,Linfen 041004,Shanxi Province,China;2.State Key Laboratory of Loess Science and Quaternary Geology,Institute of Earth Environment Science,Chinese Academy of Sciences,Xi'an 710075,China)  
After collecting and testing the soil samples from the Jinghe River Basin in the south Loess Plateau,in this study the accumulation degree and the pollution status of soil heavy metals(Cd,As,Cr and Pb) which are harmful to soil environment and human health in the drainage basin are analyzed and assessed by using the single-factor index and synthetic pollution index methods based on the "Environment Quality Standards for Soils"(GB15618-1995 II).The results reveal that the accumulation degree of heavy metals in farming soil in the Jinghe River Basin is in an order of PbAsCdCr by regarding the background values of heavy metals in soil as the standards.The accumulation degree of Pb,As and Cd in farming soil are relatively high in the drainage basin,which is mainly caused by the long-term irrational application of chemical fertilizer.The pollution degree of heavy metals in farming soil in the drainage basin is in an order of AsCdCrPb by taking the "Environment Quality Standards for Soils"(GB15618-1995 II) as the evaluation standards;the synthetic pollution index and the single-factor pollution indices of heavy metals in farming soil are all lower than 0.7,so the soil environment in the drainage basin can satisfy the safety qualification for producing chemical-free farming products and building up fruit production base based on considering the contents of heavy metals in soil.
【Fund】: 中国科学院地球环境科学研究所黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG0704);; 国家科技部软科学研究项目(2004DGS3D026);; 陕西省科技发展计划重大项目(2003K12-G5)
【CateGory Index】: X53
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