Occurrence, sources and health risk of polyfluoroalkyl substances (PFASs) in soil, water and sediment from a drinking water source area
Occurrence, sources and health risk of polyfluoroalkyl substances (PFASs) in soil, water and sediment from a drinking water source area
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DOI：
10.1016/j.ecoenv.2019.02.058
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发表时间：
2019-06-15
影响因子：
6.8
通讯作者：
Wang, Cong
中科院分区：
文献类型：
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作者：
Cao, Xianghui;Wang, Chenchen;Wang, Cong
多氟烷基物质（PFASs）在生产和消费含PFASs产品的过程中，通过各种途径进入环境指标。天津市玉桥水库是天津市重要的饮用水源地，目前对全氟辛烷磺酸的关注较少。为探讨17种全氟磺酸的发生、来源和风险，对该水源地进行了土壤、水、底泥等多介质环境采样。地表水、地下水、土壤和沉积物的Sigma PFASs浓度分别为5.839 ~ 120.885 ng/L、1.426 ~ 17.138 ng/L、0.622 ~ 5.089 mu g/kg dw和0.240 ~ 1.210 mu g/kg dw。在地表水和地下水中广泛检测到PFOA、PFBA、PFHxA、PFBS、PFHpA和PFPeA等短链（C4-C8） PFASs，检出率为bb0.78%，在17种PFASs中以PFBA和PFOA为主。此外，总PFASs与TOC的相关性在0.05水平上显著，特别是在地表水，R-2 = 0.9165 （p = 0.011）。在垂直分布特征上，4个沉积物岩心中与TOC相关的Sigma PFASs均呈现先降低后升高的趋势。地表水中PFBA/PFOA和PFHpA/PFOA与R-2呈较好的线性相关关系（0.5541 (p = 0.039)）， PFNA/PFOA和PFHpA/PFOA在0.05水平上与R-2呈较好的线性相关关系（0.6312 (p = 0.032)），表明污水和大气降水是主要污染源。虽然基于环境介质中测量浓度和参考值的RQ结果显示风险较低，但由于全氟磺酸的积累特性和远距离传播能力，可能会产生潜在危害。因此，应采取相应的管理战略，如控制源头排放、产品替代和加强立法，以消除对人类健康的潜在风险。
Polyfluoroalkyl substances (PFASs) enter into environmental metric via various pathways in the process of manufacturing and consuming the products containing PFASs. Yuqiao reservoir (YQR) is a major drinking water source in Tianjin of China, where little attention was given to PFASs. To explore the occurrence, source and risk of 17 PFASs, multi -media environmental including soil, water, and sediment were sampled from this water source area. The Sigma PFASs concentrations of surface water, groundwater, soil and sediment ranged from 5.839 to 120.885 ng/L, 1.426 to 17.138 ng/L, 0.622 to 5.089 mu g/kg dw, and 0.240 to 1.210 mu g/kg dw respectively. Some short-chained (C4-C8) PFASs were detected widely such as PFOA, PFBA, PFHxA, PFBS, PFHpA and PFPeA in surface water and groundwater, with the detection frequency of > 78%, and PFBA and PFOA dominated in the 17 PFASs. In addition, the correlations between total PFASs and TOC were significant at 0.05 level, especially in surface water with R-2 = 0.9165 (p = 0.011). In terms of vertical distribution characteristics of Sigma PFASs, the Sigma PFASs in four sediment cores showed a decreasing trend at first, and then an increasing trend from the bottom to the top associated with TOC. PFBA/PFOA and PFHpA/PFOA showed better linear correlations with R-2 of 0.5541 (p = 0.039), and for PFNA/PFOA and PFHpA/PFOA with R-2 of 0.6312 (p = 0.032) at the 0.05 level in the surface water, which indicated that sewage and atmospheric precipitation were the major sources. Though the RQ results based on the measured concentrations and reference values in environmental media revealed lower risks, the potential hazard may occur due to accumulation characteristics and long-distance transmission capability of PFASs. Hence, the corresponding management strategies should be taken, such as control over emission at source, product substitution and strengthening legislation, to eliminate potential risks to human health.