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• W2923887890 endingPage "121302" @default.
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• W2923887890 abstract "Abstract Sulfide-modified microscale zero-valent iron (S-mFe0) was applied to activate peroxymonosulfate (PMS) to degrade sulfamethoxazole (SMX), a typical sulfonamide bacteriostatic antibiotic. In this work, the effects of S/Fe molar ratio, S-mFe0 dosage, PMS dosage, different initial pH value, dissolved oxygen, SMX concentration and inorganic ions on SMX removal by S-mFe0/PMS system were investigated, respectively. Besides, the role of sulfur species (including the FeS, SO32−, S2−) was studied. In contrast to mFe0/PMS system, the removal efficiency of SMX obtained by S-mFe0 /PMS system was increased by 29.4%. Radical quenching and Electron Paramagnetic Resonance spectroscope (EPR) tests identified that both OH and SO4 − were committed to degrading SMX, and SO4 − was proven to be the dominant one. The electrochemical analysis of S-mFe0 and bare mFe0, implying a better electron transfer ability of S-mFe0 due to the formation of FeS. Furthermore, the activation of S2− for PMS could be ruled out by EPR tests results. Conversely, SO32− could effectively activate PMS to generate reactive oxygen species (ROS). The catalytic mechanisms of S-mFe0/PMS system were clarified by SEM-EDS, XRD, XPS, radical quenching and EPR tests. Based on the detected intermediates via LC-TOF-MS/MS, the degradation pathways of SMX by S-mFe0/PMS system were proposed. Overall, the work suggests that S-mFe0/PMS system has a good potential for the elimination of micropollutants in the aquatic environment." @default.
• W2923887890 created "2019-04-01" @default.
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• W2923887890 date "2019-11-01" @default.
• W2923887890 modified "2023-10-09" @default.
• W2923887890 title "Enhanced sulfamethoxazole degradation by peroxymonosulfate activation with sulfide-modified microscale zero-valent iron (S-mFe0): Performance, mechanisms, and the role of sulfur species" @default.
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• W2923887890 doi "https://doi.org/10.1016/j.cej.2019.03.178" @default.
• W2923887890 hasPublicationYear "2019" @default.
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