Exploration of oxytetracycline degradation via Co/Fe composites: Advantages of bimetal for the contribution deviation of reactive oxygen species and the corresponding lifetime extension. (1st January 2023)

• Record Type: Journal Article
• Authors: Zhong, Min; Li, Meng; Zhang, Qian; Abodif, Ahmed M.; Peng, Haojin; Xia, Zhixuan; Zhang, Yibo; Ding, Yuwei
• Is Part Of: Journal of cleaner production. Volume 382(2023)
• Publication Date: 2023-01-01
• Subjects: Oxytetracycline -- Regulation of ROS generation -- Deviation of contribution -- Oxygen vacancies -- Lifetime extension; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.135219
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Transition metals are usually applied for activating persulfate to degrade organic contaminants efficiently, and there are numerous researches utilizing bimetallic catalysts to harvest the higher performance. Mechanisms of reactive oxygen species (ROS) generation as well as the mutual transformation of bimetal have been reported a lot, yet the deviation of ROS contribution for contaminants degradation and the relevant role of metals seem to be explored deficiently. Herein, biochar decorated with bimetal of Co/Fe (Fe1/4 Co1/2-PWBC600) was prepared for peroxymonosulfate (PMS) activation and oxytetracycline (OTC) degradation, and properties of catalysts were analyzed for elaborating the intrinsic difference of ROS generation. Results showed that the structure of ROS contribution was optimized in Fe1/4 Co1/2-PWBC600/PMS system, and the co-dominance of SO4 ‒ and 1 O2 realized the better OTC degradation performance compared with the merely cobalt-based catalyst. Besides, durability tests showed that Fe1/4 Co1/2-PWBC600 performed much better in oxidation resistance and reusability, which was owing to the co-dominance effect and the consumption buffering of oxygen vacancies. This work offered a new insight into the synthesis of bimetallic catalysts to strengthen the properties pertinently, realizing the higher performance of pollutants degradation and catalyst lifetime. Graphical abstract: Image 1 Highlights: Generation of SO4 . ‒ was strengthened and structure of ROS contribution was optimized by the bimetallic catalyst. The deviation of ROS contribution realized the balance of OTC removal performance and pH tolerance. The durability enhancement of Fe1/4 Co1/2-PWBC600 was owing to not only the co-dominance of 1 O2 and SO4 . ‒ but also the consumption buffering of oxygen vacancies.