A novel hierarchical catalytic ceramic membrane for removal of sulfamethoxazole by peroxymonosulfate in complex water matrices: the advantages of the membrane-based oxidative degradation system
Chao Han , Jin Wang , Boru Gao , Mengmeng Dou , Xiaoyue Wang , Qingyun Zhang , Yufei Yan , Guangxu Zhang , Kaibo Wang
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引用次数: 0
Abstract
Peroxymonosulfate (PMS)-based advanced oxidation process (PMS-AOP) is a promising technology for water decontamination. However, the application of PMS-AOP is limited due to the susceptibility of traditional batch reaction systems to impurity interference and low mass transfer efficiency, which makes the membrane-based catalytic system an excellent alternative. In this study, a hierarchical catalytic ceramic membrane coupled PMS-AOP system was constructed. In the membrane-based catalytic system, the directional flow carrying the reactants accelerated the contact between the PMS and the catalytic components, the spatial confinement effect shortened the mass-transfer distance between the reactants, and the tortuous structure ensured the sufficiency of the catalytic reaction. The system achieved a high degradation efficiency of 85 % for sulfamethoxazole (SMX) in a continuous degradation reactor with a flow rate of 79.4 Lm−2h−1, while demonstrating high customizability, broad spectrum and environmental tolerance. Furthermore, the selectivity of the system was improved by the addition of a separating layer to isolate interfering substances, resulting in SMX degradation efficiencies of >80 % in both humic acid solution and actual wastewater, while also achieving total organic carbon (TOC) removal rates of >70 %. Finally, the possible degradation pathways of SMX were proposed through theoretical calculations, revealing the hierarchical catalytic ceramic membrane coupled SR-AOP system holds significant promise for treating micropollutants in complex aqueous matrices, thereby reducing their environmental toxicity.
期刊介绍:
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.