Oxidation of Per- and Polyfluoroalkyl Ether Acids and Other Per- and Polyfluoroalkyl Substances by Sulfate and Hydroxyl Radicals: Kinetic Insights from Experiments and Models.

ABSTRACT: Per- and polyfluoroalkyl substances (PFAS) are widely used anthropogenic chemicals. Because of the strength of the carbon-fluorine bond, PFAS are not destroyed in typical water treatment processes. Sulfate (SO₄^•-) and hydroxyl (^•OH) radicals can oxidize some PFAS, but the behavior of per- and polyfluoroalkyl ether acids (PFEAs) in processes involving SO₄^•- and ^•OH is poorly understood. In this study, we determined second-order rate constants (k) describing the oxidation of 18 PFAS, including 15 novel PFEAs, by SO₄^•- and ^•OH. Among the studied PFAS, 6:2 fluorotelomer sulfonate reacted most readily with ^•OH [k_•OH = (1.1-1.2) × 10⁷ M^-1 s<

SUBMITTER: Zhang C 

PROVIDER: S-EPMC10667564 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature