The impact of heavy metals transfer from coal waste rock to soil in Xinzhuangzi subsidence area

The transfer contamination of heavy metals from coal waste rock to soil is studied in the Xingzhuanzi mining area,and the coal waste rock and overburden soil are treated with the method of digestion.The trace elements(Pb,As,Cd,Hg) in coal waste rock and soils were determined.The results indicated that:the toxic elements Pb,As,Cd,Hg of coal waste rock can transfer to soil.And the contents vary with the distance between the coal waste rock and soil.Although the heavy metal contents of soil are higher than the mean value of Huainan,the value is coincident with the second quality specification of China,as well as the content of Hg is coincident with the first and the second quality specification of China.