武汉市土壤重金属空间分布特征及污染评价
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国家自然科学基金项目(41101193);中央高校基本科研业务费专项(2662014PY062)


Spatial distribution and pollution assessment of soil heavy metals in Wuhan urban
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    摘要:

    以武汉市主城区为研究区域,分析表层土壤中5种重金属(Pb、Zn、Cu、Cr和As)元素的含量水平及累积状况。采用单因子污染指数法、内梅罗综合污染指数法和潜在生态危害指数法评价武汉市主城区表层土壤中重金属的污染程度及生态危害等级,同时运用ArcGIS空间插值并绘制出5种重金属元素的空间分布图。结果表明:研究区内Pb、Zn、Cu、Cr、As的平均含量均高于湖北省背景值,各元素的超标率分别为38.9%、62.2%、85.5%、83.3%、98.9%,As、Zn、Cu、Cr 的累积较为明显;Zn变异系数最大,表现出强变异,Cu、Cr、As为弱变异,空间分布均一。单因子污染指数评价表明,各元素的污染指数有一定的差异,大小顺序为:Pb(0.12)< Cu(0.45)

    Abstract:

    The contents and accumulation status of heavy metals of the surface soil in Wuhan urban including Pb,Zn,Cu,Cr and As were analyzed.The soil pollution states and the rank of potential ecological hazards of heavy metals were evaluated with single factor index,Nemerow index and potential ecological risk (RI) of the surface soil.The spatial distribution of all elements was studied with the spatial interpolation in ArcGIS.The results showed that the concentrations of heavy metals including Pb,Zn,Cu,Cr and As were higher than the background value of Hubei Province,with the exceeding rate in the order of 38.9%,62.2%,85.5%,83.3%,98.9%,indicating that As,Zn,Cu and Cr were the main pollution elements.The highest of coefficient of variation(CV) was Zn,expressing the strong variation.The low variation of Cu,Cr and As was uniformed at spatial distribution.The results of single factor index showed that elements were in the order of Pb(0.12)< Cu(0.45)

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党丽娜,杨 勇.武汉市土壤重金属空间分布特征及污染评价[J].华中农业大学学报,2015,34(6):66-72

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  • 在线发布日期: 2015-10-13
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