摘要
全氟和多氟烷基化合物(PFASs)是一类广泛应用于工业和生活产品中的合成有机化合物;其在生产和使用过程中容易释放并进入环境,导致环境污染,并可能对人体健康构成潜在风险.饮用水源水是人体暴露PFASs的重要途径.因此,本研究分析了北江流域14个饮用水源地丰水期和枯水期表层水体及沉积物中31种PFASs的污染水平,并评估水体及沉积物中PFASs的生态风险及人群通过饮水摄入PFASs的健康风险.结果表明,在两季水体中分别检出15种PFASs,总浓度范围分别为0.26—10.8 ng·L^(−1)(丰水期)和0.75—104 ng·L^(−1)(枯水期),主要污染物为全氟辛酸(PFOA)和全氟丁酸(PFBA);沉积物中共检出14种PFASs,总浓度范围为0.49—8.37 ng·g^(−1)(干重),主要污染物为PFOA和全氟壬烯氧苯磺酸(PFNOBS).溯源分析结果显示,北江流域饮用水源地中PFASs的来源包括外源输入及点源污染,水体中PFASs的来源存在季节性差异.生态风险评价结果表明,水体和沉积物中PFASs的生态风险较低.人体健康风险评价结果表明,各水源地中检出的PFASs健康风险商(HQ)值均<0.2,对儿童和成人健康造成的损害可忽略.本研究结果对科学评估饮用水源地PFASs的环境污染现状、有效防控其生态环境和健康风险具有重要意义.
Perfluoroalkyl and polyfluoroalkyl substances(PFASs)represent a class of synthetic organic chemicals that are extensively employed in both industrial processes and consumer products.The production and application of PFASs can lead to their release into the environment,thereby posing significant risks of environmental contamination and potential adverse health effects due to human exposure.Drinking water sources have emerged as a critical pathway for human exposure to PFASs.Therefore,this study systematically analyzed the contamination levels of 31 PFASs in surface water and sediments collected from 14 drinking water sources within the Beijiang River Basin during both wet and dry seasons.Furthermore,it assessed the ecological risks associated with PFASs in water and sediments,as well as the potential health risks posed by PFASs intake through drinking water.The results indicated that 15 PFASs were detected in water samples from both the wet and dry seasons,with total concentrations spanning from 0.26 ng·L^(−1) to 10.8 ng·L^(−1) during the wet season and from 0.75 ng·L^(−1) to 104 ng·L^(−1) during the dry season.The predominant chemicals identified were perfluorooctanoic acid(PFOA)and perfluorobutanoic acid(PFBA).In sediment samples,14 PFASs were detected,with total concentrations ranging from 0.49-8.37 ng·g^(−1)(dry weight),and PFOA and perfluorous nonenoxybenzene sulfonate(PFNOBS)are the major chemicals.Source identification analysis revealed that the sources of PFASs in drinking water within the Beijiang River Basin included both exogenous inputs and point source pollution,with seasonal variations observed.The ecological risk assessment suggested that PFASs in water and sediments do not pose significant ecological risks.The human health risk assessment revealed that the hazard quotient(HQ)values for PFASs detected in all water source were consistently below 0.2,suggesting minimal health impacts on both children and adults.These findings are of considerable importance for the scientific evaluation of current PFAS contamination levels in drinking water sources and for the effective prevention and control of associated ecological and health risks.
作者
付成忠
唐斌
许榕发
许榕钦
周东静
周依湘
彭灿
张华东
谢春
郑晶
严骁
FU Chengzhong;TANG Bin;XU Rongfa;XU Rongqin;ZHOU Dongjing;ZHOU Yixiang;PENG Can;ZHANG Huadong;XIE Chun;ZHENG Jing;YAN Xiao(School of Public Health,Key Laboratory of Environmental Pollution Monitoring and Disease Control,Ministry of Education,Guizhou Medical University,Guiyang,561113,China;The Key Laboratory of Environmental Pollution Health Risk Assessment,Research Center of Emerging Contaminants,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou,510655,China)
出处
《环境化学》
北大核心
2025年第7期2344-2361,共18页
Environmental Chemistry
基金
国家自然科学基金(42377087)
广东省科技计划项目(2023B1212070031)
广州市科技计划项目(202206010054)资助.
作者简介
通信联系人:严骁,Tel:020-85559693,E-mail:122410386@qq.com。
