Abstract
Advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS) activation have attracted much attention in wastewater treatment. Here, a series of (NH4)2Mo3S13/MnFe2O4 (MSMF) composites were prepared and used as PMS activators to remove tetracycline (TC) for the first time. When the mass ratio of (NH4)2Mo3S13 to MnFe2O4 was 4.0 (MSMF4.0), the composite showed remarkable catalytic efficiency for activating PMS to remove TC. Over 93% of TC was removed in MSMF4.0/PMS system in 20 min. The aqueous •OH as well as the surface SO4•− and •OH were the primary reactive species for TC degradation in MSMF4.0/PMS system, and the comprehensive experimental results excluded the contributions of aqueous SO4•−, O2•−, and 1O2, high-valent metal-oxo species, and surface-bound PMS. The Mn(II)/Mn(III), Fe(II)/Fe(III), Mo(IV)/Mo(VI), and S2−/SOx2− all contributed to the catalytic process. MSMF4.0 also showed excellent activity and stability after five cycles and significant degradation efficiency for a variety of pollutants. This work will provide theoretical basis for applying MnFe2O4-based composites in PMS-based AOPs.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work was funded by the National Natural Science Foundation of China (22206057), Shandong Provincial Natural Science Foundation (ZR2020QB142), and the Science and Technology Program of University of **an (No. XKY1810).
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Xuguang Li: conceptualization, methodology, formal analysis, writing—original draft, funding acquisition; Qiaodi Wang: investigation, conceptualization, data curation, writing—original draft; **aoyu Zheng: methodology, data curation, writing—review and editing; Le Wang: investigation, methodology, formal analysis; Wei Zhang: investigation, methodology; Wen Song: formal analysis, writing—review and editing; Yanfei Li: conceptualization, formal analysis; Weiyan Pan: investigation, methodology; Tianyang Zhao: investigation, methodology; Liangguo Yan: conceptualization, project administration, funding acquisition, supervision, writing—review and editing.
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Highlights
• (NH4)2Mo3S13/MnFe2O4 composites were efficient PMS activators.
• Both aqueous and surface reactive species contributed to TC degradation.
• Mn, Fe, Mo, and S were involved in the activation of PMS.
• The catalyst still showed excellent activity and stability after five cycles.
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Li, X., Wang, Q., Zheng, X. et al. (NH4)2Mo3S13/MnFe2O4 hybrid with multiple active sites boosted activation of peroxymonosulfate for removal of tetracycline. Environ Sci Pollut Res 30, 67485–67498 (2023). https://doi.org/10.1007/s11356-023-26967-6
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DOI: https://doi.org/10.1007/s11356-023-26967-6