神府矿区煤矸石周边土壤重金属污染评价  

Assessment of periphery soil heavy metal pollution of coal gangue in Shen-Fu mining area

作　　者：刘玥[1] 韩雪峰[2] 牛宏[1] 张磊[1] 

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003 [2]辽宁工程技术大学党委组织部,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第9期1021-1025,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：陕西省自然科学基金项目(SJ08-ZT08-3)

摘　　要：为研究矿区煤矸石堆放对生态环境产生的影响,选取神府矿区煤矸石周边土壤为研究对象,探讨矿区煤矸石释放的重金属Pb、Zn、Cu、Cd、Ni、As、Cu对周边土壤污染危害状况.并用潜在生态风险指数法评价研究矿区土壤重金属污染风险等级.结果表明:神府矿区煤矸石周边土壤内重金属Pb、Zn、Cu、Cd含量均严重超过中国土壤元素背景值,其中各矿区煤矸石周边的重金属Pb、Cd的单项潜在生态风险等级均达到2级,属于中等污染;神府矿区周边土壤重金属的综合潜在生态风险指数为193.83,污染等级为3级风险,属显著污染.此外,煤矸石周边土壤淋溶实验显示重金属Pb、Zn在土壤中的溶出率高达50%多,表明重金属Pb、Zn在土壤中易发生转移.In order to research the degree of coal gangue dump effects on the ecological environment in study area, this paper selected the periphery soil of the coal gangue in mining area of Shen-Fu as the research object, and explored the pollution effects from the released heavy metals Pb, Zn, Cu, Cd, Ni, As, Cu in coal gangue. Potential ecological risk index was used for the evaluation of soil heavy metals pollution in the study area. The results show that the content of heavy metals Pb, Zn, Cu, Cd in soil are seriously exceed the Chinese soil background values, the single potential ecological risk of the periphery soil heavy metals of the coal gangue in mining area reaches the level 2, which belongs to the secondary pollution, and the synthetically potential ecological risk index reaches the level 3, which belongs to the significant pollution. Soil leaching experiments show that the release percentage rate of heavy metals Pb, Zn are more than 50% in the soil, which shows that heavy metals Pb, Zn will cause serious damage to the ecosystem by transfer in the soil. On the whole, the surrounding soil of coal gangue dumps has suffered damage in Shen-Fu, which has a certain influence on ecological system.

关 键 词：煤矸石 土壤 重金属 污染 风险评价 

分 类 号：TD98[矿业工程—选矿]