| 基于蒙特卡罗模拟的铅锌冶炼厂周边农田土壤重金属健康风险评估 |
| 摘要点击 2827 全文点击 881 投稿时间：2022-05-06 修订日期：2022-07-06 |
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| 中文关键词 铅锌冶炼 农田土壤 重金属污染 生态风险 概率健康风险 |
| 英文关键词 lead-zinc smelter agricultural soil heavy metal contamination ecological risk probabilistic health risk |
| 作者 | 单位 | E-mail | | 黄剑波 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | huangjianbo@nies.org | | 姜登登 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | | | 温冰 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | | | 王磊 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | | | 石佳奇 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | | | 周艳 | 生态环境部南京环境科学研究所, 南京 210042
国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042 | zhouyan@nies.org |
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| 中文摘要 |
| 为探明铅锌冶炼厂周边土壤重金属污染程度及人体健康风险，在云南省某铅锌冶炼厂周边农田采集56个表层土壤（0~20 cm），分析了土壤中pH和重金属Pb、Cd、Zn、As、Cu和Hg的含量，对土壤重金属含量的污染程度、生态风险和概率健康风险进行了研究.结果表明，研究区土壤中ω（Pb）、ω（Cd）、ω（Zn）、ω（As）、ω（Cu）和ω（Hg）的平均值分别为4413.93、6.89、1672.76、44.45、47.61和0.21 mg ·kg-1，均超过云南省土壤背景值.Cd的地累积指数（Igeo）平均值为0.24，单因子污染指数（Pi）平均值为30.42，潜在生态风险指数（Er）平均值为1312.60，是研究区污染最重以及生态风险最高的重金属.蒙特卡罗概率健康风险结果显示，成人和儿童的非致癌风险指数（HI）分别为2.42E-01和9.36E-01，儿童的非致癌风险超过控制值的比例为36.63%；成人和儿童的致癌风险指数（TCR）分别为6.98E-05和5.93E-04，儿童的致癌风险超过控制值的比例为86.85%；Cd和As是造成致癌风险和非致癌风险的主要因素.研究结果可为该区域实现精准风险管控和修复措施提供科学依据. |
| 英文摘要 |
| In order to identify the contamination and health risks of heavy metals in agricultural soils, a total of 56 surface soil samples (0-20 cm) were collected around a Pb-Zn smelter in Yunnan Province, and six heavy metals (Pb, Cd, Zn, As, Cu, and Hg) and pH were analyzed to assess heavy metal status, ecological risk, and probabilistic health risk. The results revealed that the average contents of six heavy metals (Pb:4413.93 mg·kg-1, Cd:6.89 mg·kg-1, Zn:1672.76 mg·kg-1, As:44.45 mg·kg-1, Cu:47.61 mg·kg-1, and Hg:0.21 mg·kg-1) were higher than their background values in Yunnan Province. Cd had the highest mean geo-accumulation index (Igeo) of 0.24, the highest mean pollution index (Pi) of 30.42, and the greatest average ecological risk index (Er) of 1312.60, indicating that Cd was the primary enriched and highest-ecological risk pollutant. The mean hazard index (HI) through exposure to six HMs was 2.42E-01 and 9.36E-01 for adults and children, respectively, with 36.63% of HI values for children exceeding the risk threshold of 1. Moreover, the mean total cancer risks (TCR) were 6.98E-05 and 5.93E-04 for adults and children, respectively, with 86.85% of TCR values for children exceeding the guideline value of 1E-04. The probabilistic health risk assessment suggested that Cd and As were the main contributors for the non-carcinogenic risks and carcinogenic risks. This work will provide scientific reference for the precise risk management and effective remediation strategy of soil heavy metal pollution in this study area. |
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