Bioaccumulation, tissue distribution, and maternal transfer of novel PFOS alternatives (6:2 Cl-PFESA and OBS) in wild freshwater fish from Poyang Lake, China

被引：10
作者：
Wang X. [1 ,2 ]
Liu Y. [2 ]
Zhang X. [2 ]
Tu W. [3 ]
Wang Q. [2 ]
Liu S. [2 ]
Zhang M. [2 ]
Wu Y. [1 ,2 ]
Mai B. [4 ]
机构：
[1] College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang
[2] Institute of Microbiology, Jiangxi Academy of Sciences, Nanchang
[3] School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang
[4] State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
来源：
Chemosphere | 2023年 / 336卷
基金：
中国国家自然科学基金;
关键词：
6:2 Cl-PFESA; Bioaccumulation factor; Maternal transfer efficiency; OBS; Tissue distribution;
D O I：
10.1016/j.chemosphere.2023.139253
中图分类号：
学科分类号：
摘要：
As emerging alternatives to perfluorooctane sulfonate (PFOS), 6:2 chlorinated polyfluoroalkyl ether sulfonic acid (6:2 Cl-PFESA) and sodium p-perfluorous nonenox-benzenesulfonate (OBS) were frequently detected in the four freshwater fish species collected from Poyang Lake. Median concentrations of 6:2 Cl-PFESA and OBS in fish tissues were 0.046–6.0 and 0.46–5.1 ng/g wet weight, respectively. The highest concentrations of 6:2 Cl-PFESA was found in fish livers, whereas OBS was found in the pancreas, brain, gonads, and skin. The tissue distribution pattern of 6:2 Cl-PFESA is similar to that of PFOS. The tissue/liver ratios of OBS were higher than those of PFOS, suggesting that OBS has a greater tendency to transfer from the liver to other tissues. The logarithmic bioaccumulation factors (log BAFs) of 6:2 Cl-PFESA in three carnivorous fish species were greater than 3.7, whereas those of OBS were less than 3.7, indicating that 6:2 Cl-PFESA had a strong bioaccumulation potential. Notably, sex- and tissue-specific bioaccumulation of OBS has also been observed in catfish. Most tissues (except the gonads) exhibited higher OBS concentrations in males than in females. However, no differences were found for 6:2 Cl-PFESA and PFOS. Maternal transfer efficiency of OBS was higher than that of 6:2 Cl-PFESA and PFOS in catfish (p < 0.05), indicating that OBS presents a higher risk of exposure to males and offspring through maternal offloading. © 2023
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