Soil Heavy Metal Pollution Assessment in Typical Coal Industry Park of Henan Province

With the accelerating process of industrialization,a large number of agriculture land have been turned to industrial using land,which leads to affect the soil environment quality of the surroundings.By the method of partition sampling,the topsoil samples were collected from area of coal industrial park in Henan Province.The contents and pollution indices of soil Hg,Cd,Zn,As,Pb and Cr were analyzed.The heavy metal contents of surrounding soil were analyzed and compared to indicate the potential factors or trend of soil environmental pollution.The results showed that the single pollution index and the Nemerow pollution index of six heavy metals in soil in coal industry park were in the security level.But the average contents were higher than the surroundings.The potential heavy metal pollution risk factor might be Hg,followed by Cd,Zn,As,Pb and Cr.As the spatial distribution,except for Cr,other tested heavy metal contents decreased with the increase of distance from the industrial park.Finally,some reasonable suggestions for soil pollution prevention were put forward according to the results of this research.