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《Journal of Arid Land Resources and Environment》 2017-09
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Distribution characteristics and assessment for farmland soil heavy metals pollution in Ruoqiang County of Xinjiang

ZENG Yanyan;ZHOU Jinlong;WANG Songtao;ZHENG Yong;College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University;Xinjiang Hydrology and Water Resources Engineering Research Center;No.2 Hydrogeology and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development;  
Based on the testing data of eight heavy metals( Cr,Pb,Cd,Cu,Zn,Ni,As and Hg) in 154 farmland soil samples collected from Ruoqiang County of Xinjiang,we analyzed the concentrations and distribution characteristics of heavy metals in farmland soil,and used the single factor index method and the Nemerow integrated index method to evaluate the soil heavy metals pollution. The results showed that the average concentrations of heavy metals except Cr and Cd were lower than soil background values of Xinjiang in topsoil,and the average concentrations of heavy metals were all lower than soil reference values of Xinjiang in deep soil,indicating slight pollution in topsoil and non-pollution in deep soil,which was consistent with the evaluation results of heavy metals pollution. The results also showed that except Pb in soil,the heavy metals concentrations gradually decreased with the increasing depths. Correlation analysis and factor analysis were used to analyze heavy metals sources in farmland topsoil. Results showed that Cr,Cd,Cu,Zn,Ni and As had similar sources,mainly came from soil-forming parent material,while Pb and Hg were mainly associated with anthropogenic sources.
【Key Words】: soil heavy metals distribution characteristics pollution assessment sources Ruoqiang County
【Fund】: 中央返还两权款资金项目(S15-1-LQ);; 新疆自治区水文学及水资源重点学科基金(xjswszyzdxk20101202)资助
【CateGory Index】: X53;X825
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