AI Article Synopsis
- Emerging per- and polyfluoroalkyl substances (PFASs) found in the aquatic environment threaten both ecosystems and human health, leading researchers to analyze surface water and fish tissue samples from the Yangtze River.
- A total of 43 PFASs were identified across 11 classes, including new findings of seven PFASs in biota and five in the environment for the first time.
- Notably, PFASs accumulated predominantly in the liver and blood, and long-chain PFASs displayed higher persistence, bioaccumulation, and toxicity (PBT) scores compared to short-chain variants, with similarities in PBT characteristics between emerging and legacy PFASs.
Article Abstract
Numerous emerging per- and polyfluoroalkyl substances (PFASs) occur in the aquatic environment, posing a threat to aquatic ecosystems and human health. In this study, we conducted a nontarget analysis on 3 surface water samples and 92 tissue samples of 16 fish collected from the Yangtze River to investigate the patterns, tissue distribution, and environmental impacts of emerging PFASs. A total of 43 PFASs from 11 classes were identified, including 17 legacy PFASs and 26 emerging PFASs. Among the 43 PFASs, seven PFASs were reported in biota for the first time while five PFASs were reported in the environment for the first time. Chlorine substituted perfluoroalyl ether sulfonic acids were the major emerging PFASs detected in organisms. Our results showed that most emerging PFASs tended to accumulate in the liver whereas perfluorinated sulfonamides tended to accumulate in the blood, and all of the emerging PFASs accumulated less in the muscle. Methods for evaluating the persistence, bioaccumulation, and toxicity (PBT) of PFASs were developed by combining the in-silico methods and experimental methods. Long-chain PFASs were found to have extremely high PBT scores compared to short-chain PFASs. Additionally, most emerging PFASs exhibited comparable PBT characteristics with legacy PFASs, especially Cl-substituted PFASs.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.131868 | DOI Listing |
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