污染物
催化作用
膜
降级(电信)
臭氧
化学
化学工程
分解
电子顺磁共振
陶瓷膜
激进的
废水
无机化学
环境化学
材料科学
环境工程
有机化学
环境科学
电信
生物化学
物理
核磁共振
计算机科学
工程类
作者
Haokun Bai,Lanlan Liang,Peike Cao,Haiguang Zhang,Shuo Chen,Hongtao Yu,Xie Quan
标识
DOI:10.1016/j.apcatb.2023.123527
摘要
Heterogeneous catalytic ozonation (HCO) is a promising technology for organic pollutants removal in wastewater treatment owing to the generation of powerful but short-lived hydroxyl radicals (HO·). Herein, we incorporate MgAl2O4 catalysts on the surface of ceramic membrane pores (MgAl membrane) to enhance HO· utilization and promote pollutant degradation under spatial confinement. The MgAl catalytic membrane achieved a removal efficiency of 74.0% for ibuprofen (5 mg/L) with 68.8% total organic carbon (TOC) removal, and the pollutant removal efficiency maintained over 67% in 25 h. Electron paramagnetic resonance (EPR) and scavenging experiments revealed that HO· played the dominant role in pollutant degradation. The catalyst surface hydroxyl groups were identified as active sites to effectively generate HO· via ozone decomposition. This work provides a viable strategy to achieve efficient pollutant degradation in wastewater treatment under spatial confinement in a membrane configuration.
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