株洲市地下水中有机污染物的污染特征与健康风险评价
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1.湖南省自然资源事务中心;2.华北科技学院矿山安全学院

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X523

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湖南省财政资金(湘财建指[2012]157号文)


Pollution Characteristics and Health Risk Assessment of Organic Pollutant in Groundwater in the Zhuzhou
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Hunan Center of Natural Resources Affairs

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    摘要:

    随着工农业的不断发展,地下水中有机污染问题对人体的健康造成的威胁也逐渐被重视。根据USEPA推荐的健康风险评价方法,结合当地自然地理和水文地质条件,对株洲市地下水有机污染物进行检测,并利用健康风险评价模型对饮水、皮肤、呼吸3种暴露途径产生的非致癌风险和致癌风险进行健康风险评价,结果表明:株洲市地下水中主要有机污染物为二氯甲烷、1,2-二氯乙烯、三氯乙烯、四氯乙烯、p,p"-DDE、p,p"-DDD。地下水中的有机污染物非致癌风险均小于规定限值,而所有采样点的致癌风险指数均超过了致癌风险限值,且ZZS119采样点超过了最大可接受致癌风险限值。地下水中有机物主要暴露途径均是呼吸途径,占总风险比例的81%左右,产生致癌风险最大的有机污染物为四氯乙烯,占比81.08%,其次是三氯乙烯,占比11.65%。株洲市地下水由于城市排污、化工厂挥发性有机物、林木杀虫剂的使用、生活废水的的排放等原因受到了严重的有机物污染,且对当地居民造成了不可接受的致癌风险。

    Abstract:

    As industry and agriculture continue to evolve, the threat of organic contamination in groundwater to human health is gaining attention. Following the health risk assessment method recommended by the USEPA, and considering local natural geographical and hydrogeological conditions, organic pollutants in Zhuzhou City"s groundwater were assessed. Using a health risk assessment model, non-carcinogenic and carcinogenic risks from three exposure pathways – drinking water, skin, and inhalation–were evaluated. Results show that key organic pollutants in Zhuzhou City"s groundwater include dichloromethane, 1,2-dichloroethylene, trichloroethylene, tetrachloroethylene, p,p"-DDE, and p,p"-DDD. Non-carcinogenic risks from these pollutants are below specified limits, but every sampling points exceed carcinogenic risk limits, with ZZS119 surpassing the maximum acceptable carcinogenic risk. Inhalation is the primary exposure pathway, contributing to approximately 81% of total risk.? Tetrachloroethylene poses the highest carcinogenic risk at 81.08%, followed by trichloroethylene at 11.65%.? Urban discharges, volatile organic compounds from chemical plants, insecticide use in forestry, and domestic wastewater discharge have severely contaminated Zhuzhou City"s groundwater, resulting in unacceptable carcinogenic risks for local residents.

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刘志尧,刘慧林,贺凯凯. 株洲市地下水中有机污染物的污染特征与健康风险评价[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-05-08
  • 最后修改日期:2024-06-05
  • 录用日期:2024-06-08
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