襄汾溃坝区土壤及农作物重金属污染特征及风险评价  

Pollution Characteristics and Risk Assessment of Heavy Metals in Soil and Crops in Dam-breaking Areas of Xiangfen

作　　者：闫姣[1] 张永清[1] 宋智萍[1] 贺小琴[1] 李育鹏[1] 

机构地区：[1]山西师范大学城市与环境科学学院,山西临汾041004

出　　处：《湖北农业科学》2014年第20期4821-4825,共5页Hubei Agricultural Sciences

基　　金：山西省研究生创新项目[2012(104053)]

摘　　要：分析了襄汾溃坝区土壤及农作物8种重金属(Cu、Zn、Cr、Cd、Pb、Ni、As、Hg)含量水平,得出了尾砂中含有Cu和Zn,造成覆盖区土壤中Cu和Zn的含量高于未覆盖区,其他6种重金属的含量均低于未覆盖区;覆盖区麦苗体内Cu和Zn的含量低于未覆盖区,其他6种重金属的含量均高于未覆盖区。相关分析表明覆盖区内Cu和Zn来源于尾矿砂,其他6种重金属在覆盖区与未覆盖区都具有同源或者伴生关系。单项指数、内梅罗综合污染指数和潜在生态风险指数结合得出溃坝物覆盖区土壤重金属污染比较轻微。富集系数表明除Cu和Zn外,覆盖区麦苗对其他6种重金属的吸收能力高于未覆盖区。The contents of eight heavy metals （Cu、Zn、Cr、Cd、Pb、Ni、As、Hg） in soil and crops in dam-breaking areas of Xiangfen were analyzed.Tailing contained Cu and Zn was found.The contents of Cu and Zn in soil of the covered areas were higher than those in soil of the non-covered areas.The levels of other six elements in soil of the covered areas were lower than those in soil of the non-covered areas.The contents of Cu and Zn in crops of the covered areas were lower than those in crops of the non-covered areas.The levels of other six elements in crops of the covered areas were higher than those in crops of the non-covered areas.The correlation analysis showed that Cu and Zn in the coverage areas were from tailing.The other six heavy metals were homologous or associated in the coverage areas and non-covered areas.The single pollution index,Nemerow＇s synthetical pollution index and the potential ecological risk index showed that soil in the coverage areas was polluted slightly by heavy metals.Enrichment coefficients showed that the uptake capacity of the other six heavy metals by wheat was higher in the coverage areas than that in non-covered areas with the exception of Cu and Zn.

关 键 词：襄汾溃坝区 土壤 农作物 重金属污染 生态风险 

分 类 号：X825[环境科学与工程—环境工程]