摘要
本文以甘肃某县为代表,对区域内冬、夏两季窖水的常规指标、17种全氟化合物和15种邻苯二甲酸酯类进行了检测,对污染来源进行了探讨,并评估了两类新污染物的健康风险.结果表明:该县窖水pH普遍偏高,夏季雨期窖水浊度显著高于冬季.新污染的检测中,共检出13种邻苯二甲酸酯类(PAEs)和14种全氟化合物(PFCs).冬季窖水中PAEs总浓度范围为2.65-3.71μg·L^(−1),总浓度平均值3.12μg·L^(−1).夏季窖水中PAEs总浓度范围为1.85-9.26μg·L^(−1),总浓度平均值为4.56μg·L^(−1).两季窖水中,邻苯二甲酸二丁酯和邻苯二甲酸二异丁酯是含量最高的成分,两种物质分别占窖水PAEs总浓度的47.8%和48.5%,窖水中PAEs没有致癌和非致癌风险.冬季窖水中PFCs的总浓度为143.93-246.47 ng·L^(−1),夏季为275.90-405.51 ng·L^(−1).检测出的PFCs包括全氟羧酸(PFCAs)和全氟磺酸(PFSAs)两大类,PFCAs占窖水PFCs总量的80%以上,是窖水中PFCs的主体.两季窖水中全氟辛酸、全氟辛烷磺酸、全氟壬酸和全氟己烷磺酸的健康风险评价结果显示,除个别窖水样品,4种PFCs的浓度一般较低不构成健康风险.
In this study,the water quality conventional indexes,and the concentrations of 17 perfluorocarbons(PFCs)and 15 phthalates(PAEs)of cellar water in winter and summer were investigated in a typical county in Gansu Province.The pollution sources and the health risks of PFCs and PAEs were evaluated.Results showed that the pH values of cellar water in this area were generally high.The turbidity of cellar water in summer was obviously higher than that in winter.A total of 13 phthalates(PAEs)and 14 perfluorocarbons(PFCs)were detected in cellar water samples.The cellar water concentrations of PAEs in winter were in the range of 2.65-3.71μg·L^(−1),with an average concentration of 3.12μg·L^(−1).In summer,the concentration of PAEs ranged from 1.85μg·L^(−1) to 9.26μg·L^(−1),with an average of 4.56μg·L−1.Dibutyl phthalate(DBP)and diisobutyl phthalate(DIBP)were the main kinds of PAEs in cellar water,accounting for 47.8%and 48.5%,respectively.Based on human health risk assessment modeling,non carcinogenic and carcinogenic risks were found in the cellar water samples.The total concentration of PFCs in cellar water was 143.93-246.47 ng·L^(−1) in winter and 275.90-405.51 ng·L^(−1) in summer.The detected PFCs included perfluorocarboxylic acids(PFCAs)and perfluorosulfonic acids(PFSAs),and PFCAs accounted for more than 80% of the total PFCs in cellar water.Health risk assessment of Perfluorooctanoic acid,perfluorooctanesulfonic acid,perfluorononanoic acid and perfluorohexanesulfonic acid in winter and summer indicated that most water cellars had low concentration levels with low health risk,with the exception of individual water cellars with health risks.
作者
郝明明
胡好天
陈儒雅
黄鑫
王海波
石宝友
郝昊天
HAO Mingming;HU Haotian;CHEN Ruya;HUANG Xin;WANG Haibo;SHI Baoyou;HAO Haotian(Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China;University of Chinese Academy of Sciences,Beijing,100049,China;School of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou,310012,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第8期2576-2585,共10页
Environmental Chemistry
基金
国家重点研发计划项目(2020YFD1100500)资助.
关键词
西北地区
窖水
水质风险
新污染物
乡村饮水安全
Northwest China
cellar water
water quality risks
emerging pollutants
rural drinking water safety
