Perfluoroalkyl substances in the Lingang hybrid constructed wetland, Tianjin, China: occurrence, distribution characteristics, and ecological risks

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 obtaine...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020-11, Vol.27 (31), p.38580-38590
Main Authors: Chen, Ziang, Ren, Gengbo, Ma, Xiaodong, Ding, Ye, Hui, Yunmin, Qin, Pingping, Xu, Zhuoqi, Gu, Xiujun, Yuan, Fang, Liu, Yanhai
Format: Article
Language:English
Subjects:
Alkanesulfonic Acids - analysis
Aquatic Pollution
atmospheric precipitation
Atmospheric Protection/Air Quality Control/Air Pollution
China
constructed wetlands
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental Monitoring
Fluorocarbons - analysis
perfluorocarbons
regression analysis
Research Article
risk
subsurface flow
toxicity
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water Pollution Control
Wetlands
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Summary: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 (Σ 8 PFASs) 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.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-09921-8