豫中平原煤矿区土壤重金属污染及其潜在生态风险评价  

Assessment and Correlation Analysis on Heavy Metals Pollution of Soil in Coal Mining Area of Central Henan Province

作　　者：李峰[1,2] 王素芳 张丽娟[1,2] Li Feng Wang Sufang Zhang Lijuan(Henan Resources and Environment Investigation Center of Coalfield geology Bureau,Zhengzhou 450003,China Henan Key Laboratory of Mine Geological Environment,Zhengzhou 450003,China SIPPR Engineering Group Co. Ltd.,Zhengzhou 450007,China)

机构地区：[1]河南省煤田地质局资源环境调查中心,郑州450003 [2]河南省矿山地质环境重点实验室,郑州450003 [3]机械工业第六设计研究院有限公司,郑州450007

出　　处：《河南科学》2016年第11期1910-1916,共7页Henan Science

基　　金：河南省国土资源厅科研项目(201162217);河南省煤田地质局科技攻关项目(201402)

摘　　要：为了保证土壤和粮食安全,对王行庄煤矿区范围内土壤和降尘中的Cu、Zn、Cr、Ni、Pb和Cd的含量进行监测,采用潜在生态风险评价和相关性分析方法,研究了土壤中重金属的污染水平、生态危害和溯源.结果表明,王行庄矿区土壤中Cr元素超标率为53.8%,其他重金属含量均达到二级土壤标准,但是Cu、Zn、Cr、Ni和Cd在土壤中均已有累积现象;矿区土壤重金属的潜在生态危害评价显示,各点重金属的生态危害都很轻微,污染程度顺序为Cd>Ni>Cu>Cr>Pb>Zn;由重金属相关性溯源可知,Pb主要来自于自然界,Cu、Zn、Cr、Ni和Cd来源较广泛,存在一定的复合污染现象,其中,大气降尘对土壤中Cu、Zn、Cr、Ni和Cd的含量有一定的贡献.In order to ensure soil and food security,we monitored the content of Cu,Zn,Cr,Ni,Pb,Cd in the soiland atmospheric deposition which collected in the Wangxingzhuang coal mining. Based on the potential ecological riskassessment and correlation analysis,we studied the heavy metal pollution level,ecological risk and source. Theresults showed that the main contribution of heavy metals pollution of soil in coal mining was Cr with an overstandardrate of 53.8%,whereas Cu,Zn,Ni,Pb,Cd were up to the second grade of soil standards. Cu,Zn,Cr,Ni andCd accumulation took place in mining area. The assessment results of ecological risk revealed on heavy metalspollution of soil in mining area had a light potential ecological risk. The order of polluting degree of these heavymetals in soil from the coal mining area was Cd〉Ni〉Cu〉Cr〉Pb〉Zn. By analyzing the sources,Pb was mainly fromthe natural world. Cu,Zn,Cr,Ni and Cd sources were more widely. There were some complex contamination. Theatmospheric deposition on soil with Cu,Zn,Cr,Ni and Cd contents had some contribution.

关 键 词：重金属 煤矿区 大气降尘 相关性 潜在生态风险评价 

分 类 号：X508[环境科学与工程—环境工程]