| 10 soil sampling sites were distributed in 500 m downwind direction of Guojiahe coal mine in Linyou County. The mass ratio of Zn, Cr, Pb, Cu, Cd, Hg and As in the surface soil was detected. The mass index and the enrichment factor were used for heavy metal evaluation in the surrounding soil of the coal mine, and the pollution source was analyzed by Spearman correlation analysis and principal component analysis method. The results showed that the average mass ratio of Cu, Pb, Zn and Hg were all higher than the background value in the soil of Shanxi (A layer) and Linyou County. The enrichment of these 7 elements from around 10 m to 150 m of the mining area were greatly influenced by human activities, Cu, Zn, Pb, Cd, As and Hg pollution were all caused by “three wastes” from coal mining, pesticides and fertilizers. Cr was mainly from soil parent material. |
