Three-dimensional electro-Fenton oxidation of levofloxacin with a cerium doped-acidified red mud and biochar particle electrode
文献类型： 外文期刊
作者： Song, Mengwei 1 ; Guo, Chunhui 1 ; Xia, Ziqiao 3 ; Tang, Bobin 4 ; Xia, Kaixin 1 ; Zhang, Jinzhong 1 ;
作者机构： 1.Southwest Univ, Coll Resources & Environm, Chongqing Key Lab Agr Resources & Environm, Chongqing 400715, Peoples R China
2.Ziyang Coll Environm Sci & Technol, Dept Environm Engn, Ziyang 641300, Sichuan, Peoples R China
3.Chongqing Chem Ind Vocat Coll, Sch Environm & Qual Test, Chongqing 401228, Peoples R China
4.Chongqing Customs, Tech Ctr, Chongqing 400020, Peoples R China
关键词： Acidified red mud; Cerium doping; Particle electrode; Three-dimensional electro-Fenton; Levofloxacin; Acidified red mud; Cerium doping; Particle electrode; Three-dimensional electro-Fenton; Levofloxacin
期刊名称：ELECTROCHIMICA ACTA （ 影响因子：5.6； 五年影响因子：5.5 ）
ISSN： 0013-4686
年卷期： 2025 年 534 卷
页码：
收录情况： SCI
摘要： In this study, a cerium doped-acidified red mud and powder biochar particle electrode (ARM-PBC/Ce electrode) was fabricated with impregnation-coprecipitation-calcination method, and was employed in a three-dimensional electro-Fenton (3D/EF) system for levofloxacin (LEV) degradation. The preparation conditions of ARM-PBC/Ce electrode were optimized, and the electrode was characterized by various techniques. In contrast with RM, the ARM-PBC/Ce electrode had higher specific surface area, lower charge transfer resistance and excellent electrochemical performance, and the valence state conversions of Fe and Ce facilitated the generation of center dot OH. Under the optimum degradation conditions (0.03 M Na2SO4 solution, initial pH 5, ARM-PBC/Ce dosage 0.4 g, applied voltage 6 V, and aeration rate 300 mL center dot min- 1), the removal efficiency of 10 mg center dot L- 1 LEV reached 95.82 % in 60 min electro-Fenton oxidation, and the bacterial toxicity decreased significantly. The 3D/EF system demonstrated superior oxidation capability and energy efficiency compared to the 2D/EF system, and center dot OH and center dot O2- were the dominant active species in the electro-Fenton oxidation of LEV. The potential degradation pathways, mainly including decarboxylation, demethylation, piperazine ring opening and hydroxylation, were proposed based on the identification of intermediate products and active species. Moreover, the particle electrode remained remarkable stability and reusability after five cycles, suggesting its promising potential for the efficient treatment of LEV in wastewater.
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