Mathematical statistics, Kriging interpolation and other methods were used to study the spatial distribution and behavior characteristics of element(Cu, Zn, Cd, Cr, Ni, Pb, As and Hg) in the soil from a coal mining subsidence area in Huaibei, Anhui. The results showed that the average content of Zn in soil was 1.1 times of its risk screening value for soil contamination of agricultural land, other elements did not exceed their risk screening values. Cu was concentrated in the south of the industrial park. Zn and As were enriched in the intersection of the two rivers and the south of the industrial park. Cd, Pb and Hg were concentrated in the west of the subsidence area. Cr and Ni were concentrated in the east and west of the subsidence area. On the soil profile, the maximum value of Cu appeared at a depth of 80 cm, the maximum value of Ni was at 40 cm, and the maximum values other elements were at 20 cm. The migration degree of Cu in the soil was the highest, and Zn, Cr, Hg and As were the lowest. The activation rate of Cd in soil was high, up to 27.1%, which was easy to be absorbed and enriched by plants. |