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- W2938576811 abstract "Electrochemical oxidation based on SO4•– and •OH generated from sulfate electrolyte is a cost-effective method for degradation of persistent organic pollutants (POPs). However, sulfate activation remains a great challenge due to lack of active and robust electrodes. Herein, a B/N codoped diamond (BND) electrode is designed for electrochemical degradation of POPs via sulfate activation. It is efficient and stable for perfluorooctanoic acid (PFOA) oxidation with first-order kinetic constants of 2.4 h–1 and total organic carbon removal efficiency of 77.4% (3 h) at relatively low current density of 4 mA cm–2. The good activity of BND mainly originates from a B and N codoping effect. The PFOA oxidation rate at sulfate electrolyte is significantly enhanced (2.3–3.4 times) compared with those at nitrate and perchlorate electrolytes. At sulfate, PFOA oxidation rate decreases slightly in the presence of •OH quencher while it declines significantly with SO4•– and •OH quenchers, indicate both SO4•– and •OH contribute to PFOA oxidation but SO4•– contribution is more significant. On the basis of intermediates analysis, a proposed mechanism for PFOA degradation is that PFOA is oxidized to shorter chain perfluorocarboxylic acids gradually by SO4•– and •OH until it is mineralized." @default.
- W2938576811 created "2019-04-25" @default.
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- W2938576811 date "2019-04-08" @default.
- W2938576811 modified "2023-10-16" @default.
- W2938576811 title "Enhanced Perfluorooctanoic Acid Degradation by Electrochemical Activation of Sulfate Solution on B/N Codoped Diamond" @default.
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- W2938576811 doi "https://doi.org/10.1021/acs.est.8b06130" @default.
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