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Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime

The nonradical process in the peroxydisulfate (PDS) oxidation system is a promising method for antibiotic removal in water. In this study, CuO@CNT was successfully synthesized by a facile approach to catalyze PDS. The removal efficiency of the antibiotic sulfamethoxazole (SMX) was 90.6% in 50 min, a...

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Autores principales: Liu, Jia, Ding, Chao, Gong, Sicheng, Fu, Kun, Deng, Huiping, Shi, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609598/
https://www.ncbi.nlm.nih.gov/pubmed/36296657
http://dx.doi.org/10.3390/molecules27207064
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author Liu, Jia
Ding, Chao
Gong, Sicheng
Fu, Kun
Deng, Huiping
Shi, Jun
author_facet Liu, Jia
Ding, Chao
Gong, Sicheng
Fu, Kun
Deng, Huiping
Shi, Jun
author_sort Liu, Jia
collection PubMed
description The nonradical process in the peroxydisulfate (PDS) oxidation system is a promising method for antibiotic removal in water. In this study, CuO@CNT was successfully synthesized by a facile approach to catalyze PDS. The removal efficiency of the antibiotic sulfamethoxazole (SMX) was 90.6% in 50 min, and the stoichiometric efficiency (ΔSMX/ΔPDS) was 0.402. The very different degradation efficiency of common organic contaminants revealed the selective oxidation of the surveyed system. The process of (1)O(2) oxidation and the electron-transfer regime was exhibited by chemical quenching tests, electron paramagnetic resonance (EPR) determination, a UV–vis spectrophotometer, X-ray photoelectron spectroscopy (XPS) detection, and cyclic voltammetry (CV) measurements. Sustainable catalysis was promoted by the circulation between the surface electron-rich centers of Cu(II) and Cu(III). Dissolved oxygen (DO) and a metastable Cu(III) intermediate contributed to the generation of (1)O(2). Still, a portion of SMX was removed by the mildly activated PDS. Moreover, the influence factors (pH, dosage, water matrix) were examined, and suppressions were acceptable by common anions and real water. Distinguished from the radical process, unique intermediate products were ascertained via the theoretical calculation and liquid chromatography–mass spectrometry (LC-MS) detection. Furthermore, CuO@CNT showed a satisfactory activation ability in the cycling experiments. Overall, this study developed CNT to be a supporter of CuO, unveiled the mechanism of catalysis, and evaluated the application potential of the nonradical process.
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spelling pubmed-96095982022-10-28 Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime Liu, Jia Ding, Chao Gong, Sicheng Fu, Kun Deng, Huiping Shi, Jun Molecules Article The nonradical process in the peroxydisulfate (PDS) oxidation system is a promising method for antibiotic removal in water. In this study, CuO@CNT was successfully synthesized by a facile approach to catalyze PDS. The removal efficiency of the antibiotic sulfamethoxazole (SMX) was 90.6% in 50 min, and the stoichiometric efficiency (ΔSMX/ΔPDS) was 0.402. The very different degradation efficiency of common organic contaminants revealed the selective oxidation of the surveyed system. The process of (1)O(2) oxidation and the electron-transfer regime was exhibited by chemical quenching tests, electron paramagnetic resonance (EPR) determination, a UV–vis spectrophotometer, X-ray photoelectron spectroscopy (XPS) detection, and cyclic voltammetry (CV) measurements. Sustainable catalysis was promoted by the circulation between the surface electron-rich centers of Cu(II) and Cu(III). Dissolved oxygen (DO) and a metastable Cu(III) intermediate contributed to the generation of (1)O(2). Still, a portion of SMX was removed by the mildly activated PDS. Moreover, the influence factors (pH, dosage, water matrix) were examined, and suppressions were acceptable by common anions and real water. Distinguished from the radical process, unique intermediate products were ascertained via the theoretical calculation and liquid chromatography–mass spectrometry (LC-MS) detection. Furthermore, CuO@CNT showed a satisfactory activation ability in the cycling experiments. Overall, this study developed CNT to be a supporter of CuO, unveiled the mechanism of catalysis, and evaluated the application potential of the nonradical process. MDPI 2022-10-19 /pmc/articles/PMC9609598/ /pubmed/36296657 http://dx.doi.org/10.3390/molecules27207064 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Jia
Ding, Chao
Gong, Sicheng
Fu, Kun
Deng, Huiping
Shi, Jun
Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title_full Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title_fullStr Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title_full_unstemmed Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title_short Enhanced Degradation of Antibiotic by Peroxydisulfate Catalysis with CuO@CNT: Simultaneous (1)O(2) Oxidation and Electron-Transfer Regime
title_sort enhanced degradation of antibiotic by peroxydisulfate catalysis with cuo@cnt: simultaneous (1)o(2) oxidation and electron-transfer regime
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609598/
https://www.ncbi.nlm.nih.gov/pubmed/36296657
http://dx.doi.org/10.3390/molecules27207064
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