Efficient degradation of tetracycline by CoFeLa-layered double hydroxides catalyzed peroxymonosulfate: Synergistic effect of radical and nonradical pathways
| Autor: | Liangguo Yan, Yanxia Zhao, Tailei Hou, Lixin Shan, Xin Meng, Xuguang Li |
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| Rok vydání: | 2020 |
| Předmět: |
Reaction mechanism
Environmental Engineering Health Toxicology and Mutagenesis Radical 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences engineering.material Photochemistry 01 natural sciences Catalysis Tandem Mass Spectrometry Hydroxides Environmental Chemistry Reactivity (chemistry) Waste Management and Disposal 0105 earth and related environmental sciences 021110 strategic defence & security studies Quenching (fluorescence) Chemistry Layered double hydroxides Pollution Peroxides engineering Degradation (geology) Selectivity |
| Zdroj: | Journal of Hazardous Materials. 398:122884 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2020.122884 |
| Popis: | Advanced oxidation technologies based on peroxymonosulfate (PMS) have attracted increasing attention because of their high reactivity and selectivity. Herein, we reported a novel CoFeLa-LDH catalyst, which exhibited excellent performance to activate PMS for tetracycline (TC) elimination. The influence of extra addition, simulation wastewater tests and the reusability experiments were investigated in detail. Remarkably, the quenching experiments and the results of EPR demonstrated the synergistic effect of radical and nonradical pathways in the TC degradation. Free radicals (SO4– and HO ) played predominant roles in the first 1 min, and then both free and non-free radicals (1O2) interacted with TC. The possible TC degradation pathways were proposed on basis of the intermediates, which were analyzed by UPLC-QTOF-MS/MS. Finally, the reaction mechanisms of TC degradation in CoFeLa-LDH2/PMS system were proposed according to the comprehensive analysis. |
| Databáze: | OpenAIRE |
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