School of Civil and Transportation Engineering, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Environ Sci Pollut Res Int. 2020 Nov;27(31):38580-38590. doi: 10.1007/s11356-020-09921-8. Epub 2020 Jul 5.
In this study, the occurrence, spatial distribution, sources, and ecological risks of perfluoroalkyl substances (PFASs) in the surface waters of the Lingang hybrid constructed wetland were systematically investigated. Twenty-three PFASs were analyzed from 7 representative sampling zones. The obtained results indicated that PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFBS, PFOS, and HFPO-DA were frequently detected; and PFBA, PFOA, and PFOS were the dominant PFASs with the relative abundances in ranges of 26.91 to 52.26%, 11.79 to 28.79%, and 0 to 31.98%, respectively. The total concentrations of 8 PFASs (ΣPFASs) ranged from 25.9 to 56.6 ng/L, and the highest concentration was observed in subsurface flow wetland. Moreover, HFPO-DA with high toxicity was detected in wetlands for the first time. Based on the principal component analysis-multiple linear regression (PCA-MLR) analysis, three sources and their contributions were fluoropolymer processing aids (67.6%), fluororesin coatings and metal plating (17.9%), and food packaging materials and atmospheric precipitation (14.5%), respectively. According to the risk quotients (RQs), the ecological risk of 8 PFASs was low to the aquatic organisms.
本研究系统调查了临港混合人工湿地地表水的全氟烷基物质（PFASs）的发生、空间分布、来源和生态风险。从 7 个代表性采样区分析了 23 种 PFASs。结果表明，频繁检测到 PFBA、PFPeA、PFHxA、PFHpA、PFOA、PFBS、PFOS 和 HFPO-DA；PFBA、PFOA 和 PFOS 是主要的 PFASs，相对丰度范围分别为 26.91%至 52.26%、11.79%至 28.79%和 0 至 31.98%。8 种 PFASs（ΣPFASs）的总浓度范围为 25.9 至 56.6ng/L，最高浓度出现在地下流湿地。此外，湿地中首次检测到具有高毒性的 HFPO-DA。基于主成分分析-多元线性回归（PCA-MLR）分析，三个来源及其贡献分别为氟聚合物加工助剂（67.6%）、氟树脂涂料和金属电镀（17.9%）和食品包装材料和大气降水（14.5%）。根据风险商数（RQs），8 种 PFASs 对水生生物的生态风险较低。
