| 单县表层土壤重金属污染特征、健康风险及溯源解析 |
| 摘要点击 1207 全文点击 195 投稿时间：2024-02-21 修订日期：2024-03-27 |
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| 中文关键词 重金属（HMs） 地累积指数 富集指数 健康风险 源解析 |
| 英文关键词 heavy metals（HMs） geo-accumulation index enrichment index health risks source analysis |
| 作者 | 单位 | E-mail | | 赵庆令 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队), 济宁 272100
自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 济宁 272100
山东农业大学资源与环境学院, 泰安 271018 | zqlzb@126.com | | 李清彩 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队), 济宁 272100
自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 济宁 272100
山东农业大学资源与环境学院, 泰安 271018 | qclee2008@163.com | | 马龙 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队), 济宁 272100
自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 济宁 272100 | | | 贾琛 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队), 济宁 272100
自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 济宁 272100 | | | 陈娟 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队), 济宁 272100
自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 济宁 272100 | |
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| 中文摘要 |
| 掌握土壤重金属污染风险特征及定量解析潜在来源,对精准防控、科学管理与安全利用土壤资源具有重要意义.以单县表层土壤为研究对象,采集并测定了330件表层土壤样品As、Cd、Cr、Cu、Hg、Ni、Pb和Zn等8种重金属含量,借助地累积指数和富集指数评价了重金属污染程度,利用生态环境部指定的健康风险模型评价了重金属所产生的致癌风险和非致癌风险,运用绝对主成分得分-多元线性回归模型（APCS-MLR）定量解析了表层土壤中重金属的来源.结果表明,单县表层土壤样品中8种重金属的平均值均低于菏泽市表层土壤背景值和国家农用地土壤污染风险筛选值,Hg含量的变异系数达40.26%,其他7种元素含量的变异系数均低于15.2%；经Igeo和EF评价,仅Hg元素约5%的样点为轻微污染,其他7种重金属均为无污染或轻微污染状态；表层土壤中As对成人及儿童的致癌风险和非致癌风险为可耐受水平,其他7种重金属对成人及儿童的致癌风险和非致癌风险均可忽略；表层土壤中Cd、Cu、Zn、Ni和As的主要物质来源为自然背景源,Cr和Hg的主要物质来源分别为农业养殖源和工业燃煤源,Pb的主要污染来源包括其他未知源和自然背景源,自然背景源、农业养殖源、工业燃煤源和其他未知源平均贡献率分别为51.69%、27.18%、6.83%和14.31%,说明单县表层土壤中重金属来源主要为自然背景源,其次为农业养殖源. |
| 英文摘要 |
| Soil heavy metal （HM） pollution is a prominent global environmental problem. Understanding the risk characteristics and quantitative analysis of potential sources of soil HM pollution is of great significance for accurate prevention and control, scientific management, and safe utilization of soil resources. In the surface soil of Shanxian County, the contents of eight HMs, such as As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, were collected and identified in 330 surface soil samples. The HM pollution degree was evaluated using the accumulation index and enrichment index. The carcinogenic and non-carcinogenic risks of HMs were evaluated using the health risk model designated by the Ministry of Ecology and Environment. The sources of HMs in topsoil were analyzed using correlation analysis, principal component analysis, cluster analysis, absolute principal component score-multiple linear regression （APCS-MLR）, and other qualitative and quantitative methods. The results showed that all eight HM elements in the surface soil samples were lower than the background values and the screening values of agricultural land soil pollution risk in Heze City. According to Igeo and EF evaluation, only approximately 5% of Hg samples were slightly polluted, and the other seven HMs were non-polluted or slightly polluted. The carcinogenic risk and non-carcinogenic risk of As for adults and children in surface soil were at tolerable levels, and the carcinogenic risk and non-carcinogenic risk of the other seven HMs for adults and children could be ignored. The main sources of Cd, Cu, Zn, Ni, and As in the surface soil were natural background sources； the main sources of Cr and Hg were agricultural breeding sources and industrial coal sources, respectively； and the main pollution sources of Pb included other unknown sources and natural background sources. The average contribution rates of natural background sources, agricultural breeding sources, industrial coal sources, and other unknown sources were 51.69%, 27.18%, 6.83%, and 14.31%, respectively, indicating that the main sources of heavy metals in the surface soil of Shanxian County were natural background sources, followed by agricultural breeding sources. |
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