| 华中某铅冶炼场地土壤重金属空间分布及其生态风险评价 |
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| 作者姓名： | 张雨菲 谭静强 邓敏 胡国清 郭朝晖 李楚璇 薛生国 |
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| 作者单位： | 1. 中南大学冶金与环境学院, 长沙 410083;2. 中南大学地球科学与信息物理学院, 长沙 410083;3. 中南大学湘雅公共卫生学院, 长沙 410078 |
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| 基金项目： | 国家重点研发计划项目(2019YFC1803605)资助 |
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| 摘 要： | 为探究污染场地土壤重金属空间分布及其生态风险,以华中某铅冶炼场地为研究对象,检测土壤As、Cd、Cr、Cu、Hg、Ni、Pb和Zn 8种元素,利用ArcGIS对土壤重金属空间分布进行插值分析,采用内梅罗综合指数法及潜在生态风险指数法对土壤污染状况进行风险评估。结果表明:铅冶炼场地重金属污染严重,土壤As、Pb、Cr含量超标率分别为80%、50%和50%;表层土壤空间分布为局部点状污染,电解车间土壤重金属含量较高,主要与冶炼废渣堆存有关;内梅罗综合污染指数评价显示Pb、As为重度污染水平,潜在生态风险评价发现As、Cd、Hg和Pb处于极强危害等级,这表明Pb、As、Hg、Cd是该铅冶炼场地修复的目标污染物。
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| 关 键 词： | 冶炼场地 重金属污染 空间分布 生态风险 场地修复 |
| 收稿时间： | 2021-11-05 |
| 修稿时间： | 2021-12-09 |
Spatial distribution and ecological risk assessment of heavy metals in a lead smelting site in Central China |
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| Authors: | HANG Yufei TAN Jingqiang DENG Min HU Guoqing GUO Zhaohui LI Chuxuan XUE Shengguo |
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| Institution: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. School of Geosciences and Info-physics, Central South University, Changsha 410083, China;3. XiangYa School of Public Health, Central South University, Changsha 410078, China |
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| Abstract: | Taking a lead smelting site in Central China as the research object, the contents of 8 heavy metals, including As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, in the soil of the smelter were determined in order to explore the spatial distribution of heavy metal pollution in the soil of nonferrous smelting sites and its ecological risks. Using the interpolation analysis method of ArcGIS, the spatial distribution characteristics of heavy metals in the soil was studied. The Nemerow index method and potential ecological risk assessment were used to assess the contamination level. The lead smelting site showed severe contamination. The over-standard rates of As, Pb, and Cr in the soil were 80%, 50%, and 50%. The spatial distribution characteristics of surface soil heavy metal pollution were mainly local spotty pollution and the high content of heavy metals was mostly concentrated in the electrolysis workshop due to the accumulation of heavy metal containing waste residue. According to the evaluation results of Nemerow pollution index, Pb and As in the research area reached the level of severe pollution. The results of potential ecological risk assessment showed that As, Cd, Hg, and Pb had a extremely strong risk. Combining the two pollution assessment methods, Pb, As, Hg, Cd were the target pollutants of soil remediation in this area. The research results have important scientific significance and practical guidance value for heavy metal remediation in lead smelting site. |
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| Keywords: | smelting site heavy metal pollution spatial distribution ecological risk site remediation |
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