潘一采煤塌陷区底泥重金属分布特征

Distribution Characteristics of Heavy Metals in Sediments of Panji No.1 Coal Mining Subsidence

为了研究采煤塌陷区底泥中重金属污染状况,采集了淮南潘一采煤塌陷区底泥样品30份,测定了底泥中7种重金属(Cu、Zn、Pb、Ni、Cd、Cr和Hg)含量,并进行了空间分布特征研究,结果表明:整个塌陷区底泥中重金属总量随深度逐渐递减,重金属呈现出表面富集的现象。塌陷区底泥中Cu、Pb、Ni、Cr、Hg的含量在不同深度均达到土壤环境质量标准(GB 15618-1995)中的一级标准,重金属Cd的含量达到二级标准,Zn的含量已达到三级标准。

To study the situation of heavy metal pollution in the sediment of coal mining subsidence, 30 sediment samples were collected from Panji No. 1 Coal Mining Subsidence Area in IJuainan, the contents of 7 kinds of heavy metals （Cu, Zn, Pb, Ni, Cd, Cr and Hg） were determined, spatial distribution characteristics were studied. The results demonstrated that the total amount of heavy metals in the sediment of the whole subsidence area decreased gradually with the depth, heavy metals showed the surface enrichment phenomenon. The content of Hg, Pb, Ni, Cr and Cu in the sediment of subsidence area reached the first level standard of the soil environmental quality standard（ GB 15618-1995 ） at different depths. The content of heavy metal Cd reached the level of two, and the content of Zn reached the level of three .