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- W4200446560 endingPage "133436" @default.
- W4200446560 startingPage "133436" @default.
- W4200446560 abstract "Advanced reduction by strong reducing hydrated electrons is a promising approach to degrade per- and polyfluoroalkyl substances (PFAS). This research aimed to investigate the effectiveness of UV/Iodide system for 6:2 chlorinated polyfluorinated ether sulfonate (6:2 Cl-PFESA, F-53B) degradation in aqueous solutions. Results from this work demonstrated that UV irradiation with an addition of 0.3 mM KI resulted in 55.99% degradation of F-53B within 15 min and almost 100% within 2 h. The defluorination efficiency of F-53B in the UV/Iodide system was 2.6 times higher than that in the sole UV system after 2 h of irradiation. The degradation efficiency of F-53B was not significantly affected by air purging. The defluorination efficiency with air bubbling, however, was 14.57% lower than that with nitrogen purging. The photodegradation of F-53B in the UV/Iodide system could be well described by a pseudo-first-order kinetic model. Degradation rate constant of F-53B correlated positively with the initial concentration. At 20 μg/L, the pseudo-first-order rate constant was 5.641 × 10-2 min-1 and the half-life was 12.29 min. Higher initial concentration also required less energy input to achieve the same degradation efficiency. The detection and identification of degradation intermediates implied that destruction of F-53B started from dechlorination and followed by continuously flaking off CF2 units." @default.
- W4200446560 created "2021-12-31" @default.
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- W4200446560 date "2022-04-01" @default.
- W4200446560 modified "2023-10-02" @default.
- W4200446560 title "Photodegradation of F–53B in aqueous solutions through an UV/Iodide system" @default.
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- W4200446560 doi "https://doi.org/10.1016/j.chemosphere.2021.133436" @default.
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