Green synthesis of sulfur‐doped g‐C3N4 nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N ‐nitrosodimethylamine formation potential
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Abstract BACKGROUND In this study, sulfur‐doped g‐C3N4 (SCN) nanosheets were synthesized using thiourea as a precursor, and then used to catalyze the degradation of oxytetracycline (OTC) under visible‐light irradiation. OTC was chosen as target contaminant because of it being an important precursor of N‐nitrosodimethylamine (NDMA). RESULTS The removal of OTC was influenced by its initial concentration, initial pH, SCN dosage and water matrices. OTC (≤10 mg L−1) was almost completely removed in 40 min under the conditions of an initial pH of 7.0 and a SCN dose of 1.0 g L−1, and its degradation was well described by the pseudo‐first‐order kinetics model. Water matrices would also influence the degradation of OTC in the system. Electron paramagnetic resonance analysis and trapping experiments confirmed that the function of the radicals for OTC removal followed the order of •O2− > •OH > h+. Eight transformation products were determined during the degradation of OTC, it being removed through four pathways: methyl oxidization, demethylation, decarbonylation and secondary alcohol oxidation. SCN was stable in the system, as the removal efficiency of OTC was not significantly reduced even after three recycles. In addition, 55.5% of NDMA formation potential of OTC was reduced after SCN catalytic oxidation. CONCLUSIONS The results imply that the visible‐light‐driven SCN catalytic oxidation is an effective technology not only for the removal of OTC but also for the reduction of NDMA formation potential. © 2021 Society of Chemical Industry
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Green synthesis of sulfur‐doped <scp>g‐C<sub>3</sub>N<sub>4</sub></scp> nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its <scp><i>N</i></scp>‐nitrosodimethylamine formation potential
- Date Crossref
- 16/02/2021
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Tongji University pays non établi dans la noticeUniversité ou école supérieure
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State Key Laboratory of Pollution Control and Resource Reuse pays non établi dans la noticeStructure de recherche
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Shanghai Institute of Pollution Control and Ecological Security pays non établi dans la noticeStructure de recherche
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Shanghai Jinyuan Senior High School pays non établi dans la noticeUniversité ou école supérieure
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Zhejiang University of Technology pays non établi dans la noticeUniversité ou école supérieure
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College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water Environment pays non établi dans la noticeUniversité ou école supérieure
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Shanghai Weiyu High School Shanghai China pays non établi dans la noticeInstitution
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Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment pays non établi dans la noticeUniversité ou école supérieure
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse et Shanghai Institute of Pollution Control and Ecological Security, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.