| 典型纳污坑塘周边地下水污染来源识别及其健康风险评估 |
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| 引用本文： | 谢先军,刘红杏,高爽,苏春利.典型纳污坑塘周边地下水污染来源识别及其健康风险评估[J].地质科技通报,2020,39(1):34-42. |
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| 作者姓名： | 谢先军 刘红杏 高爽 苏春利 |
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| 作者单位： | 中国地质大学（武汉）环境学院 |
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| 基金项目： | 水体污染控制与治理科技重大专项"白洋淀与大清河流域（雄安新区）水生态环境整治与水安全保障关键技术研究与示范"项目2018ZX07110"唐河污水库及雄安新区典型纳污坑塘地下水防控技术研究及工程示范"项目2018ZX07110005 |
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| 摘 要： | 以典型纳污坑塘(污水库)周边地下水水质监测数据为基础,在对区内地下水污染源进行分析的基础上,采用水环境健康风险评估模型,对区内地下水污染健康风险进行了系统评价研究.污染来源识别结果表明:纳污坑塘周边第Ⅰ、第Ⅱ含水层地下水污染严重,其污染源主要为坑塘内堆放的工业污水以及工业废渣.污染健康风险评估结果表明:8号坑附近第Ⅰ含水层中砷浓度以及北库南侧第Ⅱ含水层中1,2-二氯乙烷总致癌风险分别为10-2、10-3数量级,远超可接受风险水平10-6.不同含水层中污染物平均致癌风险大小关系为,第Ⅰ含水层:砷>1,2-二氯乙烷;第Ⅱ含水层:1,2-二氯乙烷>砷>1,1,2-三氯乙烷>四氯化碳.1,2-二氯乙烷等挥发性有机污染物4种潜在暴露途径的平均致癌风险大小关系表现为:饮用地下水>皮肤接触地下水>经室外吸入空气中气态污染物>经室内吸入空气气态污染物.相对于敏感用地,非敏感用地污染物的总致癌风险以及危害商较低.
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| 关 键 词： | 地下水 污染源 健康风险 暴露途径 环境质量 |
| 收稿时间： | 2019-12-14 |
Source identification and health risk assessment of groundwater pollution in typical sewage pits and ponds |
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| Xie Xianjun,Liu Hongxing,Gao Shuang,Su Chunli.Source identification and health risk assessment of groundwater pollution in typical sewage pits and ponds[J].Bulletin of Geological Science and Technology,2020,39(1):34-42. |
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| Authors: | Xie Xianjun Liu Hongxing Gao Shuang Su Chunli |
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| Affiliation: | (School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430078,China) |
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| Abstract: | In order to study the groundwater pollution in typical sewage pits and ponds and its potential risk to human health, based on the groundwater quality monitoring data, the source of groundwater pollution in the area was identified, and the water environment health risk assessment model was used to systematically assess the health risk of groundwater pollution in the area. The results of pollution source identification show that groundwater pollution in the first and second aquifers is serious, and the main pollution sources are industrial waste water and industrial waste residue stacked in the area. The results of health risk assessment show that the total carcinogenic risk of arsenic in the first aquifer near NO.8 pit in the area and the total carcinogenic risk of 1, 2-dichloroethane in the second aquifer on the south side of the north reservoir are 10-2 and 10-3, far higher than the acceptable risk level of 10-6 and other monitoring wells around. The overall relationship between the average carcinogenic risk of pollutants in different aquifers is as follows: the first aquifer: arsenic > 1, 2-dichloroethane; the second aquifer: 1, 2-dichloroethane > arsenic > 1, 1, 2-trichloroethane > carbon tetrachloride. Among the various exposure routes, drinking groundwater is the main exposure route for such pollutants as fluorine, arsenic, 1, 2-dichloroethane, 1, 1, 2-trichloroethane and carbon tetrachloride. The relationship between the average carcinogenic risk of four potential exposure routes of volatile organic pollutants such as 1, 2-dichloroethane is as follows: drinking groundwater > skin contact with ground water>inhaling gaseous pollutants from groundwater in outdoor air > inhaling gaseous pollutants from groundwater in indoor air. Compared with sensitive landuse, non-sensitive landuse has lower cancer risk and hazard quotient since the exposure hazards in childhood is not considered. |
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| Keywords: | groundwater pollution sources health risk exposure routes environmental quality |
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