锰矿废弃地重金属污染土壤的评价及修复措施探讨

采用地积累指数及LarsHakanson潜在生态危害指数法对湘潭锰矿废弃地重金属的生态危害进行评价与比较。结果表明，CA、Mn、Pb、Zn、的地积累指数均大于5，达到极严重污染水平，Cu为中等污染水平。5种重金属的潜在生态危害系数和潜在生态危害指数表明，Mn、Pb、CA为极强的生态危害，Zn为中等生态危害，Cu为轻微生态危害，Mn、Pb、CA生态危害系数均高于极强生态危害系数的临界值，为该地区产生生态危害的主要因子。多种重金属潜在生态危害指数表明，该地区重金属污染属于极强的生态危害。两种评价方法对比，潜在生态危害指数法略为保守，两者结合更具实际应用意义。

Assessment on Heavy Metal Pollution in Soil of Abandoned Mn Mines and Its Remediated Measures Discussion

An assessment was presented using Igeo and ecological risk index to evaluate the heavy metal pollutions in soil of Xiangtan Mn-Mine.The results of Geoaccumulation index reveal that the pollution indexes of Cd、Mn、Pb、Zn are big enough to reach a high pollution index(>5),the soil was extremely contaminated.The potential ecological risk indexes of heavy metals indicated that the soil was seriously affected by heavy metals.The ecology harm manifested of Cd、Mn and Pb extremely high,and the excessive potential ecological risk likely to be brought by Cd、Pb and Mn,which are the worst of potential ecological risk genes.The soil was moderately contaminated with Zn and slightly contaminated with Cu.At the same time,contrasted to the method of Igeo,Hakanson's pollution ecological risk index was more conservative,the combination of the Igeo and ecological risk index will be more practive.