Regulating persulfate activation routes on CuO catalyst by Mn dopants for highly efficient elimination of antibiotics: Synergistic radical/non-radical mechanism

文献类型： 外文期刊

第一作者： Zheng, Weiran

作者： Zheng, Weiran;Lei, Ling;Yu, Guoguang;Zhang, Yaning;Xu, Huajun;Zhou, Baocheng

作者机构：

关键词： Copper oxide; Manganese oxide; Persulfate; Antibiotic elimination; Mechanism

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2025 年 70 卷

页码：

收录情况： SCI

摘要： Persulfate (PS) activation via heterogeneous catalysis has been becoming a promising strategy for eliminating antibiotic residues in aquatic environment. Herein, we coupled radical and non-radical routes for PS activation on TM-doped CuO (TM-CuO) catalyst. Using the high-concentration moxifloxacin (MOX, 200 mg L-1) as model pollutant, Mn-CuO was optimized as the best catalyst among a variety of TM-CuO catalysts, and the Mn percentage in Mn-CuO was optimized to 13 wt%. The radical/non-radical mechanism resulted in the significant enhancement by the Mn-CuO/PS system, and the degradation rate is similar to 3 times higher than that of the CuO/PS system. Furthermore, this Mn-CuO/PS system demonstrated universality for different antibiotic pollutants, as well as excellent practical application potential in different real water environments. The MOX degradation path was also provided, and the toxicity assessment indicated the degradation has greatly decreased the environmental risk of MOX residue. Catalyst characterization results suggested co-existence of Mn3+/Mn2+ and Cu2+/Cu+, where the Mn3+/Mn2+ (1.54 V vs. SHE) drove the radical activation of PS and the Cu2+/Cu+ (0.52 V vs. SHE) was inclined to form surface complex. This study demonstrates that coupling radical route in the CuO catalyst through doping TM is a promising strategy to activate PS for high-concentration antibiotic elimination.

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