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Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism.
Water Res. 2020 Apr 15; 173:115559.WR

Abstract

Peroxymonosulfate (PMS) is extensively used as an oxidant to develop the sulfate radical-based advanced oxidation processes in the decontamination of organic pollutants and various PMS activation methods have been explored. Visible-light-assisted PMS activation to construct a Fenton-like process has shown a great potential for pollution control. In our work, BiVO4 nanosheets were prepared using a hydrothermal process and used to activate PMS under visible light. A rapid degradation of ciprofloxacin (CIP) was achieved by dosing PMS (0.96 g/L), BiVO4 (0.32 g/L) under visible light with a reaction rate constant of 77.72-fold higher than that in the BiVO4/visible light process. The electron spin resonance and free radical quenching experiments indicate that reactive species of O2-, h+, •OH and SO4•- all worked, where h+, •OH and SO4•- were found as the dominant contributors to the CIP degradation. The spectroscopic analyses further demonstrate that the photoinduced electrons were directly involved in the PMS activation process. The generated O2- was partially utilized to activate PMS and more •OH was produced because of the chain reactions between SO4•- and H2O/OH-. In this process, PMS acted as an electron acceptor to transfer the photo-induced charges from the conduction band of BiVO4 and PMS was successfully activated to yield the high-powered oxidative species. From the degradation intermediates of CIP detected by a liquid-chromatography-mass spectrometer, the possible degradation pathways were proposed. The substantially decreased toxicity of CIP after the reaction was also observed. This work might provide new insights into the visible-light-assisted PMS activation mechanisms and is useful to construct environmentally-friendly catalytic processes for the efficient degradation of organic pollutants.

Authors+Show Affiliations

CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, China.CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, China.College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, China; CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China. Electronic address: hqyu@ustc.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32028250

Citation

Chen, Fei, et al. "Catalytic Degradation of Ciprofloxacin By a Visible-light-assisted Peroxymonosulfate Activation System: Performance and Mechanism." Water Research, vol. 173, 2020, p. 115559.
Chen F, Huang GX, Yao FB, et al. Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism. Water Res. 2020;173:115559.
Chen, F., Huang, G. X., Yao, F. B., Yang, Q., Zheng, Y. M., Zhao, Q. B., & Yu, H. Q. (2020). Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism. Water Research, 173, 115559. https://doi.org/10.1016/j.watres.2020.115559
Chen F, et al. Catalytic Degradation of Ciprofloxacin By a Visible-light-assisted Peroxymonosulfate Activation System: Performance and Mechanism. Water Res. 2020 Apr 15;173:115559. PubMed PMID: 32028250.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Catalytic degradation of ciprofloxacin by a visible-light-assisted peroxymonosulfate activation system: Performance and mechanism. AU - Chen,Fei, AU - Huang,Gui-Xiang, AU - Yao,Fu-Bing, AU - Yang,Qi, AU - Zheng,Yu-Ming, AU - Zhao,Quan-Bao, AU - Yu,Han-Qing, Y1 - 2020/01/28/ PY - 2019/12/06/received PY - 2020/01/21/revised PY - 2020/01/26/accepted PY - 2020/2/7/pubmed PY - 2020/4/9/medline PY - 2020/2/7/entrez KW - BiVO(4) KW - Catalytic degradation KW - Mechanism KW - Peroxymonosulfate KW - Visible light KW - Water treatment SP - 115559 EP - 115559 JF - Water research JO - Water Res. VL - 173 N2 - Peroxymonosulfate (PMS) is extensively used as an oxidant to develop the sulfate radical-based advanced oxidation processes in the decontamination of organic pollutants and various PMS activation methods have been explored. Visible-light-assisted PMS activation to construct a Fenton-like process has shown a great potential for pollution control. In our work, BiVO4 nanosheets were prepared using a hydrothermal process and used to activate PMS under visible light. A rapid degradation of ciprofloxacin (CIP) was achieved by dosing PMS (0.96 g/L), BiVO4 (0.32 g/L) under visible light with a reaction rate constant of 77.72-fold higher than that in the BiVO4/visible light process. The electron spin resonance and free radical quenching experiments indicate that reactive species of •O2-, h+, •OH and SO4•- all worked, where h+, •OH and SO4•- were found as the dominant contributors to the CIP degradation. The spectroscopic analyses further demonstrate that the photoinduced electrons were directly involved in the PMS activation process. The generated •O2- was partially utilized to activate PMS and more •OH was produced because of the chain reactions between SO4•- and H2O/OH-. In this process, PMS acted as an electron acceptor to transfer the photo-induced charges from the conduction band of BiVO4 and PMS was successfully activated to yield the high-powered oxidative species. From the degradation intermediates of CIP detected by a liquid-chromatography-mass spectrometer, the possible degradation pathways were proposed. The substantially decreased toxicity of CIP after the reaction was also observed. This work might provide new insights into the visible-light-assisted PMS activation mechanisms and is useful to construct environmentally-friendly catalytic processes for the efficient degradation of organic pollutants. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/32028250/Catalytic_degradation_of_ciprofloxacin_by_a_visible_light_assisted_peroxymonosulfate_activation_system:_Performance_and_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(20)30095-6 DB - PRIME DP - Unbound Medicine ER -
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