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通过对锰矿区土壤重金属全量及其形态分布的分析,结果表明,土壤中Cu、Zn、Pb、Cr 4种金属的含量达到《土壤环境质量标准》的二级标准,Cd含量超过《土壤环境质量标准》的二级标准。从各元素形态分布来看,Cu、Pb主要以铁锰氧化物结合态和残渣态为主;Mn主要以铁锰结合为主;Zn、Cr主要以残渣态为主;Cd不同的样地各形态分布不一;从不同形态的重金属的生物有效性来看,Cu、Cd、Pb、Mn以可利用态和潜在可利用态为主,其中Mn潜在可利用态占为86.1%;Zn、Cr以不可利用态为主。锰矿区Cd与Mn 2种重金属是锰矿区污染土壤修复中主要修复对象。
The results showed that the content of Cu, Zn, Pb and Cr 4 metals in soil reached the second-level standard of “Soil Environmental Quality Standard”, and the content of Cd exceeded “Soil Environmental Quality Standard ”second-class standard. According to the morphological distribution of all the elements, Cu and Pb are mainly dominated by Fe-Mn oxides, while Mn is mainly dominated by Fe-Mn, while Zn and Cr are mainly dominated by residuals. In terms of the bioavailability of different forms of heavy metals, Cu, Cd, Pb and Mn are mainly available and potentially available forms, of which Mn potential available forms account for 86.1%; Zn, Cr To non-utilitarian state-based. Manganese ore area Cd and Mn 2 kinds of heavy metals are the main repair objects in manganese ore area contaminated soil remediation.