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- W4313197993 abstract "A novel sulfur-modified Fe3O4 composite (SF10) with excellent magnetic properties was prepared via a solvothermal method. Compared with unmodified Fe3O4, SF10 exhibited excellent performance on the activation of peroxydisulfate (PDS) for atrazine degradation and maintained good reusability. According to the quenching experiments and electron paramagnetic resonance (EPR) test, hydroxyl radical (•OH) and sulfate radical (SO4•−) were the main active species. Notably, comprehensive characterization of the morphology, crystal structure, electrochemical analysis, and surface chemical composite revealed that sulfur modification introduced pyrite and pyrrhotite phases into Fe3O4 structure to improve its catalytic activity and electron transfer capacity. Density functional theory calculations showed that sulfur modification enhanced the electron transfer from Fe3O4 to PDS and the adsorption of PDS on the catalyst surface, which was beneficial for the activation of PDS. Moreover, the surface reducing sulfur species (≡S2− and ≡S22−) acted as the electron donor for Fe(II) regeneration, driving a faster Fe(II)/Fe(III) redox cycle of SF10 for the activation of PDS. This study provides a further understanding of the synergism between sulfur and iron, and broadens the application of Fe3O4 in PDS-based advanced oxidation processes for wastewater treatment." @default.
- W4313197993 created "2023-01-06" @default.
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- W4313197993 date "2023-02-01" @default.
- W4313197993 modified "2023-09-30" @default.
- W4313197993 title "Enhanced persulfate activation by sulfur-modified Fe3O4 composites for atrazine degradation: Performance and mechanism" @default.
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- W4313197993 doi "https://doi.org/10.1016/j.psep.2022.12.074" @default.
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