| 基于生物可给性的农用地土壤重金属复合污染非致癌健康风险评估 |
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| 引用本文： | 李慧,韩雅静,朱晓辉,党垚,董辰寅,蔡立梅,向明灯,于云江.基于生物可给性的农用地土壤重金属复合污染非致癌健康风险评估[J].环境科学研究,2023,36(4):783-793. |
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| 作者姓名： | 李慧 韩雅静 朱晓辉 党垚 董辰寅 蔡立梅 向明灯 于云江 |
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| 作者单位： | 1.长江大学资源与环境学院，湖北 武汉 430100 |
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| 基金项目： | 国家重点研发计划项目(No.2021YFC1808904，2019YFC1803403) |
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| 摘 要： | 为科学评估农用地土壤重金属复合暴露对儿童的非致癌健康风险，以华南某生态观光园类农用地为研究对象，对其表层土壤中As、Cd、Cr、Cu、Pb、Ni、Zn、Hg的含量进行检测，采用单项污染指数法和内梅罗综合污染指数法评估其污染程度，并引入二元证据权重(binary weight of evidence, BINWOE)法和重金属生物可给性对儿童非致癌健康风险进行修正.结果表明：(1)研究区表层土壤中As、Cd、Cr、Cu、Pb、Ni、Zn、Hg的含量分别为1.72～19.40、0.07～19.00、4.00～52.00、4.00～42.00、36.60～1.07×104、8.00～23.00、62.00～1.52×103、0.01～0.49 mg/kg,8种重金属的传统非致癌健康风险值的范围为0.65～78.80，其中部分点位As、Cd、Cr及Pb的儿童非致癌风险处于不可接受水平(HQ>1).(2)4种重金属(As、Cd、Cr、Pb)引入BINWOE法修正的儿童非致癌健康风险值是传统方法的0.67～3.31倍.(3)基于重金属生物可给性的儿...
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| 关 键 词： | 农用地 重金属 土壤 非致癌健康风险 生物可给性 |
| 收稿时间： | 2022-08-23 |
Non-Carcinogenic Health Risk Assessment of Heavy Metals Combined Exposure from Soil of Agricultural Land Based on Bioavailability |
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| Affiliation: | 1.College of Resources and Environment, Yangtze University, Wuhan 430100, China2.State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510530, China |
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| Abstract: | In order to scientifically evaluate the non-carcinogenic health risk of children exposed to heavy metals in agricultural land soil, As, Cd, Cr, Cu, Pb, Ni, Zn and Hg in the agricultural land surface soil of an ecological tourism park in South China were analysed. The methods of the single pollution index and the Nemero comprehensive pollution index were used to evaluate soil contamination of heavy metals. Besides, the binary weight of evidence (BINWOE) and the bioavailability of heavy metals were further performed to modify the non-carcinogenic health risk of children. The results indicated that: (1) The contents of As, Cd, Cr, Cu, Pb, Ni, Zn and Hg in the surface soil of the study area were 1.72-19.40, 0.07-19.00, 4.00-52.00, 4.00-42.00, 36.60-1.07×104, 8.00-23.00, 62.00-1.52×103, and 0.01-0.49 mg/kg, respectively. The traditional non-carcinogenic health risk of 8 heavy metals ranged from 0.65 to 78.80, while the non-carcinogenic risks of children with As, Cd, Cr and Pb at some sampling points were at unacceptable levels (HQ>1). (2) The non-carcinogenic health risk value of 4 heavy metals (As, Cd, Cr, Pb) in childrenbased on BINWOE method was 0.67-3.31 times that of traditional methods. (3) The non-carcinogenic health risks of children assessed based on the bioavailability of heavy metals (0.70-75.00) were 0.38-0.92 times as high as those assessed (1.72-116.10) based on the total amount of heavy metals. Our study demonstrates that it is necessary to take the bioavailability and the interaction between heavy metals into consideration when evaluating the non-carcinogenic health risks of children exposed to multiple heavy metals in agricultural land, thus avoiding the underestimation/overestimation of the actual health risks of contaminated soil to children by traditional risk assessment methods. |
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