标题: Continuous peroxymonosulfate activation by a novel CoFe2O4-functionalized carbon fiber electroactive filter towards ultrafast and cost-effective decontamination: Performance, mechanism and application

作者: Chang, DG (Chang, Dengao); Luo, Y (Luo, Yi); Song, SY (Song, Siyuan); Huang, Y (Huang, Yu); Zhao, YL (Zhao, Yalun); Ou, Y (Ou, Yun); Li, ZM (Li, Ziming); Wang, X (Wang, Xu)

来源出版物: CHEMICAL ENGINEERING JOURNAL 卷: 502 文献号: 158031 DOI: 10.1016/j.cej.2024.158031 Published Date: 2024 DEC 15

摘要: Constructing an integrated electrochemical filtration system for flow-through electrocatalytic peroxymonosulfate (PMS) activation presents an efficient strategy for treating wastewater containing organic micropollutants. However, there remains a deficiency of feasible and cost-effective flow-through systems for practical applications. Herein, we developed a novel electroactive CoFe2O4-functionalized carbon fiber filter (CoFe2O4/CFF) to activate PMS towards ultrafast and cost-effective degradation of sulfamethoxazole (SMX). CoFe2O4 nanoparticles were uniformly loaded onto the surface of carbon fiber by hydrothermal synthesis, resulting in a diameter of 110.6 +/- 26.3 nm. Under optimal conditions, SMX was degraded 98.0 % in a single-pass through the CoFe2O4/ CFF. The system exhibited robust performance across complicated matrices (e.g., tap water and lake water), a variety of micropollutants (75.4-98.0 %) and especially over a broad initial pH range (3 - 10). We identified the reaction pathways involving reactive oxygen species (1O2, SO center dot- 4 and center dot OH) and high-valence metals, which collectively facilitated the efficient degradation of pollutants within the system. Theoretical calculations further confirmed that the Co-Fe bimetallic system in CoFe2O4 exhibited significant synergistic effects, consistent with experimental findings. The system's superior catalytic performance can be attributed primarily to convectionenhanced mass transfer from the flow-through design and to the improved catalytic activity and robustness of CoFe2O4 catalysts, driven by accelerated redox cycles of Co3+/Co2+ and Fe3+/Fe2+ due to the applied cathode potential. Benefiting from the integration of electrochemistry, the proposed catalytic filtration system demonstrated strong anti-fouling properties. Detailed calculations and comparative analyses substantiated the costeffectiveness of this system. Therefore, the electroactive CoFe2O4/CFF-based flow-through electrocatalytic PMS activation system offers a unique and economically viable approach for the efficient and ultrafast remediation of sulfamethoxazole.

作者关键词: Peroxymonosulfate; Electroactive filter; Flow-through; Carbon fiber; Cobalt ferrite; Co-Fe bimetallic synergies

KeyWords Plus: BISPHENOL-A; DEGRADATION; OXIDATION; RADICALS; WATER; CONTAMINANTS; FILTRATION; NANOTUBES; COMPOSITE; CATALYST

地址: [Chang, Dengao; Luo, Yi; Huang, Yu; Zhao, Yalun; Ou, Yun; Li, Ziming; Wang, Xu] Wuhan Univ, Sch Resources & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Song, Siyuan] Powerchina Huadong Engn Corp Ltd, Hangzhou 311122, Peoples R China.

[Huang, Yu] Tsinghua Univ, Inst Environm & Ecol, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China.

通讯作者地址: Wang, X (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

电子邮件地址: xu.wang@whu.edu.cn

影响因子：13.4