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《Environmental Science and Management》 2009-05
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The Determination of the Singularity Thresholds of Soil Cd in Daxing,Hefei Using Fractal Method

Wang Wei1,Zhang Yinghui2,Yuan Feng3,Li Xiangling3,Zhou Taofa3(1.Hefei Institute of Environmental Science,Hefei 230041,China; 2.Hefei Sikang Environmental Scientific and Technological Consulting Company Itd,Hefei 230041,China; 3.School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China)  
It is of great significance to determinate the singularity thresholds value of elements in soil for environmental geochemical evaluation,the traditional way of the singularity thresholds value is only suitable to the element data that is normal distribution.Nevertheless,the spatial distribution of chemical elements in soil is extremely complicated,which has the multi-fractal distribution characteristic possibly,and the background and anomaly values of elements usually show independent power index relationship.This paper discusses to use fractal method to determinate the singularity thresholds value of Cd element in soil of typical industrial district.Based on the concentration-area fractal,the singularity thresholds value of Cd element's determination in soil of Daxin in Hefei(typical industrial district)is 0.445 mg/kg,and the anomaly extension is also selected based on this thresholds.Compared with the singularity thresholds value of elements and the anomaly extension in soil which are determined by the traditional methods(X-+2S),the results show that the anomaly extension selected by fractal method which control the main enterprise that leads to Cd element pollution in area is effectively and reasonably.
【Fund】: 安徽省优秀青年科技基金项目(编号:04045063)
【CateGory Index】: P632
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