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- W2893073622 abstract "In this study, the activation of bisulfite by cerium(IV) (Ce(IV)/HSO3− process) is proposed for the first time to degrade organic contaminants. Experiments show that carbamazepine (CBZ), a representative recalcitrant contaminant of emerging concern, is oxidized by Ce(IV)/HSO3− treatment at pHini 3.0–7.0 when O2(aq) is present to promote HSO3− autoxidation. SO4−, HO, and SO5− were identified as active oxidants of CBZ based on the ESR spectra and the results of alcohol quenching experiments. Quantitative analysis indicates that SO4− plays a major role, while HO and other species play minor roles in the degradation of CBZ in the Ce(IV)/HSO3− process. SO4− radicals are derived from the reaction of SO5− with HSO3− and the activation of hydrogen peroxomonosulfate (HSO5−) by Ce(IV). Five degradation pathways of CBZ are proposed based on transformation products identified by UPLC-QToF-MS/MS, and proposed sites for radical attack are supported by the results of frontier electron density calculations. Elevated concentrations of Cl−, Fe(III), and humic acid (HA) inhibit CBZ degradation, while other non-target solutes have minimal effects on CBZ degradation in the Ce(IV)/HSO3− process. Finally, experiments demonstrating degradation of a suite of other organic contaminants suggests that the Ce(IV)/HSO3− system can be applied as a new advanced oxidation process for wastewater treatment." @default.
- W2893073622 created "2018-10-05" @default.
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- W2893073622 date "2019-02-01" @default.
- W2893073622 modified "2023-10-16" @default.
- W2893073622 title "Degradation of organic contaminants through activating bisulfite by cerium(IV): A sulfate radical-predominant oxidation process" @default.
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- W2893073622 doi "https://doi.org/10.1016/j.cej.2018.09.024" @default.
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