| 基于蒙特卡罗模拟的煤矸山周边农用地土壤重金属健康风险评估 |
| 摘要点击 2677 全文点击 821 投稿时间：2022-11-05 修订日期：2022-12-06 |
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| 中文关键词 煤矸山 土壤 重金属 蒙特卡罗 健康风险评估 |
| 英文关键词 gangue heap of coal mine soil heavy metals Monte Carlo health risk assessment |
| 作者 | 单位 | E-mail | | 马杰 | 重庆市生态环境监测中心, 重庆 401147
农村生态与土壤监测技术研究中心, 重庆 401147 | pony312@qq.com | | 佘泽蕾 | 重庆文理学院, 重庆 402160 | | | 王胜蓝 | 重庆市生态环境监测中心, 重庆 401147
农村生态与土壤监测技术研究中心, 重庆 401147 | 276473514@qq.com | | 邓力 | 重庆市生态环境监测中心, 重庆 401147
农村生态与土壤监测技术研究中心, 重庆 401147 | | | 刘萍 | 重庆市生态环境监测中心, 重庆 401147
农村生态与土壤监测技术研究中心, 重庆 401147 | | | 孙静 | 重庆市生态环境监测中心, 重庆 401147
农村生态与土壤监测技术研究中心, 重庆 401147 | |
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| 中文摘要 |
| 以重庆市煤矸山周边农用地土壤为研究对象，运用内梅罗指数、地累积指数和潜在生态风险指数分析土壤重金属污染水平，并采用蒙特卡罗模拟的健康风险模型，探析研究区土壤重金属对人体的健康风险.结果表明，研究区土壤Cd、Hg、As、Pb、Cr、Cu、Ni和Zn含量均值超重庆市土壤背景值，地累积指数（Igeo）表现为：Cd>Hg>Cu>As>Ni>Zn>Cr>Pb；内梅罗指数表明土壤以轻污染（1<PN≤2）为主，各重金属污染指数（Pi）表现为：Cd>Cu>Ni>Cr>Zn>As>Pb>Hg；潜在生态风险指数表明土壤以中等生态风险（150≤RI<300）为主，各重金属生态风险指数（Eri）表现为：Cd>Hg>As>Cu>Ni>Pb>Cr>Zn.土壤健康风险表明，儿童和成人非致癌健康风险可忽略，但存在可耐受致癌健康风险，综合致癌风险指数（TCR）均值分别为1.04E-5和3.94E-6，主要致癌因子为As和Cd.敏感性分析表明非致癌健康风险土壤颗粒摄入速率（Ringest）敏感性最高，其次是As含量，致癌健康风险土壤颗粒摄入速率As含量敏感性最高，其次是土壤颗粒摄入速率（Ringest）.整体上儿童非致癌和致癌健康风险高于成人. |
| 英文摘要 |
| To analyze the pollution characteristics of heavy metals in the soil of farmland surrounding the gangue heap of a coal mine in Chongqing, the Nemerow, Muller, and Hakanson indices were used. Meanwhile, to investigate the health risks of heavy metals in soil, a health risk assessment model was employed using Monte Carlo simulation. The results revealed that the average contents of Cd, Hg, As, Pb, Cr, Cu, Ni, and Zn were higher than their soil background values, and the Muller index (Igeo) from high to low was as follows:Cd>Hg>Cu>As>Ni>Zn>Cr>Pb. The Nemerow index (PN) demonstrated that the results of the assessment indicated mainly light pollution (1<PN ≤ 2). The single factor index (Pi) from high to low was as follows:Cd>Cu>Ni>Cr>Zn>As>Pb>Hg. The Hakanson index (RI) demonstrated that the results of the assessment indicated mainly moderate ecological risk (150 ≤ RI<300). The single ecological risk index (Eri) from high to low was as follows:Cd>Hg>As>Cu>Ni>Pb>Cr>Zn. The health risk assessment of heavy metals revealed that the non-carcinogenic health risks of children and adults could be ignored, but carcinogenic health risks existed, with an average total carcinogenic risk index (TCR) of 1.04E-5 and 3.94E-6, respectively. The major carcinogenic factors were As and Cd. Sensitivity analysis of non-carcinogenic health risks revealed that the ingestion rate of soil (Ringest) was the most sensitive, followed by the contents of As. Meanwhile, sensitivity analysis of carcinogenic health risks indicated that the content of As was the most sensitive, followed by the ingestion rate of soil (Ringest). In general, the health risks of children, including non-carcinogenic and carcinogenic risks, were higher than those of adults. |
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