环境与职业医学2024，Vol.41Issue(9)：1043-1048,6.DOI:10.11836/JEOM24193
2017-2021年河北省城区生活饮用水中化学物的检测及慢性非致癌风险评估
Detection and chronic non-carcinogenic risk assessment of chemicals in urban drinking water in Hebei Province from 2017 to 2021
摘要
Abstract
[Background]Hebei Province is located in the North China Plain.In view of the influence of geo-logical background and the acute and chronic hazards caused by excessive drinking water toxico-logical indicators,coupled with the large coverage of water supply in urban areas and the existence of self-built water supply facilities,it is necessary to understand the drinking water sanitation status in urban areas and conduct health risk assessment. [Objective]To investigate main indicators affecting the compliance rate of drinking water quality in urban areas of Hebei and evaluate the chronic non-carcinogenic risks of 11 chemicals. [Methods]The collection,preservation,and testing of 14299 samples of finished water,tap wa-ter,and secondary water supply in urban areas of Hebei Province from 2017 to 2021 were con-ducted following the Standard examination methods for drinking water(GB/T 5750-2006).A total of 11 chemicals were evaluated according to the Hygienic standards for drinking water(GB 5749-2006).The chronic non-carcinogenic risks of the 11 chemicals in drinking water by oral exposure were assessed using the four-step health risk assessment model developed by the United States Environmental Protection Agency and the Technical guide for environ-mental health risk assessment of chemical substances(WS/T 777-2021). [Results]From 2017 to 2021,the compliance rates of arsenic,cadmium,hexavalent chromium,lead,mercury,selenium,cyanide,chloro-form,and carbon tetrachloride in drinking water in urban areas of Hebei Province were all 100.00%,and fluoride and nitrate(N)were the main indicators affecting water quality compliance,with compliance rates of 97.68%and 99.53%respectively.The compliance rate of flu-oride increased year by year(χ2=178.06,P<0.05),and the concentration showed a downward trend(χ2=563.49,P<0.05).The compliance rate of fluoride in water samples during the wet season was higher than that during the dry season(χ2=5.06,P<0.05).The median con-centrations of fluoride and nitrate in drinking water in urban areas of Hebei Province from 2017 to 2021 were 0.36 mg·L-1 and 3.32 mg·L-1,with hazard quotients of 0.15 and 0.05,respectively,both less than 1,suggesting no chronic non-carcinogenic risks,and no significant gender difference was found.The hazard quotient of maximum fluoride concentration was 1.65,which was greater than 1,suggesting chronic non-carcinogenic risks.The chronic non-carcinogenic risks associated with the maximum concentrations of the remaining 10 chemical indicators were all within an acceptable range. [Conclusions]Nine toxicological indicators in drinking water in urban areas of Hebei Province from 2017 to 2021,except for fluoride and nitrate,are within the national standards.Fluoride and nitrate are the main toxicological indicators that affect the overall compliance rate of water quality,and the chronic non-carcinogenic risks associated with maximum concertration of nitrate and 95%concentration of fluoride are at an acceptable level.关键词
生活饮用水/毒理学指标/氟化物/硝酸盐/慢性非致癌风险Key words
drinking water/toxicological indicator/fluoride/nitrate/chronic non-carcinogenic risk分类
医药卫生引用本文复制引用
丁婷婷,安玉琴,刘毅刚,袁树华,王苏玮..2017-2021年河北省城区生活饮用水中化学物的检测及慢性非致癌风险评估[J].环境与职业医学,2024,41(9):1043-1048,6.基金项目
河北省医学科学研究重点课题计划(20210098) This study was funded. （20210098）
