煤矸石充填复垦区对周围土壤重金属影响特征

Influent Characteristics of Heavy Metals in Soil Around the Filling Reclamation Area of Coal Waste Rock Pile

在新庄孜矿复垦区煤矸石山附近土壤进行纵向、水平和垂直深度布点采样,采用电感耦合等离子体质谱仪ICP-MS检测风干后的土样中Cu、Pb、Cd、Zn、Cr、Ni、As、Hg八种重金属离子的含量,研究其分布特征,结果表明:矸石山附近土壤重金属含量随距离增加而降低,但会因煤矸石风化其粉尘迁移和地形不同在距矸石山某一距离出现增加的现象;距矸石山相同距离的土壤中重金属含量大致相同;在垂直深度方向上,重金属主要聚集在地下20cm至40cm处。

The soil longitudinally,horizontally and vertically around the filling reclamation area of coal waste rock pile in the Xinzhuangzi coal mine reclamation area was sampled,and the ICP-MS was used to detect the content of eight kinds of heavy metal ions(Cu,Pb,Cd,Zn,Cr,Ni,As,Hg)in the air-dried soil sample,then their distribution characteristics are studied.The results show that the content of heavy metals in the soil a round the coal waste rock pile decreases with distance increased,but the content will increase due to the dust migration and terrain at a certain distance;The content of heavy metals in the soil at the same distance from the gangue hill is roughly the same;In the vertical depth direction,the heavy metals are mainly concentrated in the underground 20-40cm.