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- W4310553404 startingPage "103393" @default.
- W4310553404 abstract "Fe2+ activated peroxodisulfate (Fe2+/PDS) system has been widely studied for its efficient degradation of pollutants. However, the slow circulation of Fe3+/Fe2+ greatly restricted the application of the system. In the study, AOII was significantly degraded by using Fe3+ coupled with Cu0 activate PDS system (Fe3+/Cu0/PDS system). Compared with the traditional Fe2+/PDS system, the Fe3+/Cu0/PDS system greatly improved the degradation of AOII and the decolorization rate reached 80.6 % within 30 min. The quenching experiments and electron spin resonance (EPR) showed that both hydroxyl radical (•OH) and sulfate radical (SO4•−) were the mainly primary reactive oxygen species in the Fe3+/Cu0/PDS system with the contribution rates of SO4•− and •OH being 60.54 % and 25.06 % respectively. In the Fe3+/Cu0/PDS system, Cu0 formed Cu+ through H+ corrosion and PDS/O2 oxidation. Then, Cu+ oxidized by O2 to produce H2O2 and Fe3+ was reduced by Cu0 and Cu+ to form Fe2+. Finally, Cu+ and Fe2+ catalyzed PDS to generate SO4•−, and •OH was yield by the process of Cu+ and Fe2+ induced H2O2 and the reaction of OH−/H2O and SO4•−. Common water matrices such as NO3− and SO42− had no effect on the degradation, while Cl− promoted the degradation, and CO32− and fulvic acid inhibited the degradation of AOII. Over 68.5 % of AOII was degraded in the experimental water samples and the Fe3+/Cu0/PDS system had great degradation performances in practical water sample of other contaminants. Moreover, the final discharge of total dissolved copper was <1 mg/L after sediment and filtering." @default.
- W4310553404 created "2022-12-12" @default.
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- W4310553404 date "2023-02-01" @default.
- W4310553404 modified "2023-09-28" @default.
- W4310553404 title "Synergistic enhancement of Fe3+ coupling with Cu0 activated peroxodisulfate: Performance and mechanisms" @default.
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- W4310553404 doi "https://doi.org/10.1016/j.jwpe.2022.103393" @default.
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