Assessment of Heavy Metal Pollution in Soil Surrounding a Company in Jiaxing, China

Abstract

The content of eight elements of Sb, Cu, Co, Pb, As, Ni, Cd and Cr in soil samples in the northwest direction at different horizontal distance and depth under the prevailing wind and southeast of China was determined by the 500m soil in the vicinity of an automobile parts company in Jiaxing. The soil accumulation index and potential ecological hazard index were used to assess the risk of heavy metal pollution. The results show that: there are four kinds of heavy metals in the surface soil which are higher than the national soil background value, in which Sb and Cd heavy metal elements generally exceed the standard value, but there is no obvious law of the concentration distribution in the plane, and human activities have a strong disturbance to the heavy metal in the region, but the wind direction has little The soil Cd around the auto parts company have reached a very polluted level, Sb reaches medium-strong pollution, Ni, As, Pb, Co, Cu, Cr Five kinds of heavy metals are mild-medium, and the pollution degree of each metal does not decrease with the increase of soil depth, and there is no regularity in longitudinal distribution. As, Although the carcinogenic risk of two kinds of heavy metals in Ni is acceptable, there are potential carcinogenic risks, which should be controlled and given high attention and prevention.