Legacy and emerging poly- and perfluorochemicals in seawater and sediment from East China Sea

Following the global phase out of perfluorooctane sulfate (PFOS), chlorinated polyfluoroalkyl ether sulfonates (Cl-PFAESs) and p-perfluorous nonenoxybenzenesulfonate (PFNOBS) have emerged as novel PFOS substitutes. However, until now, limited data is available on their occurrence and environmental b...

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Bibliographic Details
Published in:The Science of the total environment 2021-11, Vol.797, p.149052-149052, Article 149052
Main Authors: Hu, Hongmei, Zhang, Yingying, Zhao, Nan, Xie, Jiahui, Zhou, Yanqiu, Zhao, Meirong, Jin, Hangbiao
Format: Article
Language:English
Subjects:
6:2 Cl-PFAES
PFNOBS
PFOA
Seawater
Sediment
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Summary:Following the global phase out of perfluorooctane sulfate (PFOS), chlorinated polyfluoroalkyl ether sulfonates (Cl-PFAESs) and p-perfluorous nonenoxybenzenesulfonate (PFNOBS) have emerged as novel PFOS substitutes. However, until now, limited data is available on their occurrence and environmental behaviors in the marine environment. Here, seawater and sediment samples were collected from East China Sea and analyzed for Cl-PFAESs, PFNOBS, and perfluoroalkyl acids (PFAAs; including their branched isomers) to investigate their concentrations, potential sources, and sediment-seawater partitioning behaviors. Perfluorooctanoate (PFOA) and PFOS were consistently the predominant PFAAs in seawaters and sediments. Branched PFOA and PFOS isomers were consistently much less frequently detected in sediments than that in seawaters. Linear PFOA contributed 92–95% of total PFOA in seawaters, suggesting the great contribution of telomerization PFOA. 6:2 Cl-PFAES was detected in all seawaters (concentration, 0.58–47 pg/L) and in the majority of sediments (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2021.149052