Biotic and abiotic transformations of aqueous film-forming foam (AFFF)-derived emerging polyfluoroalkyl substances in aerobic soil slurry

Water Research, Год журнала: 2025, Номер 276, С. 123284 - 123284

Опубликована: Фев. 11, 2025

Язык: Английский

Unraveling the Exposure Spectrum of PFAS in Fluorochemical Occupational Workers: Structural Diversity, Temporal Trends, and Risk Prioritization

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Despite extensive poly/perfluoroalkyl substance (PFAS) discovery studies in various samples, the exposure spectrum fluorochemical occupational workers remains largely unexplored. Here, serum samples from 28 at a facility were analyzed using nontarget techniques, identifying 64 PFAS classes, including 15 novel ones such as pentafluorosulfur ether-substituted perfluoroalkyl sulfonic acids, hydrogen-substituted perfluoroalkylamines, and perfluoroalkylsulfonyl protocatechualdehyde esters. Temporal trend analyses (2008–2018) revealed stable levels for most but an increase perfluorobutanoic acid (PFBA) perfluorohexanesulfonic (PFHxS), suggesting industrial shifts long-chain to short-chain homologues China since early 2010s. Commonly reported structurally modified (e.g., hydrogen/carbonyl/chlorine substitution, ether insertion, unsaturation) likely historical byproducts of legacy production rather than intentionally manufactured alternatives. A Toxicological Priority Index-based risk assessment, integrating mobility, persistence, bioaccumulation indices, identified di(perfluoroakyl sulfonyl)imides, acids/carboxylic perfluoroalkylsulfonamidoacetic acids high-risk chemicals. Overall, exhibited higher mobility lower persistence PFAS, except chlorinated variants, which showed increased potential. This study highlights critical gaps historically emitted emphasizes need large-scale monitoring assessments manage emerging PFAS.

Язык: Английский

Practical Considerations for the Optimization of In Situ Mineralization of Perfluorocarboxylic Acids and Polyfluoroalkyl Substances using Persulfate Oxidation

Water Research, Год журнала: 2024, Номер 273, С. 123015 - 123015

Опубликована: Дек. 19, 2024

Язык: Английский