Hirani Rajan Arjan Kalyan, Wu Hong, Asif Abdul Hannan, Rafique Nasir, Shi Lei, Zhang Shu, Wu Zhentao, Zhang Lai-Chang, Wang Shaobin, Yin Yu, Saunders Martin, Sun Hongqi
School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia.
College of Materials Science and Engineering, Nanjing Forestry University, 210037 Nanjing, China.
J Hazard Mater. 2023 Apr 15;448:130874. doi: 10.1016/j.jhazmat.2023.130874. Epub 2023 Jan 25.
Membrane separation and sulfate radicals-based advanced oxidation processes (SR-AOPs) can be combined as an efficient technique for the elimination of organic pollutants. The immobilization of metal oxide catalysts on ceramic membranes can enrich the membrane separation technology with catalytic oxidation avoiding recovering suspended catalysts. Herein, nanostructured CoO ceramic catalytic membranes with different Co loadings were fabricated via a simple ball-milling and calcination process. Uniform distribution of CoO nanoparticles in the membrane provided sufficient active sites for catalytic oxidation of 4-hydroxybenzoic acid (HBA). Mechanistic studies were conducted to determine the reactive radicals and showed that both SO and OH were present in the catalytic process while SO plays the dominant role. The anti-fouling performance of the composite Co@AlO membranes was also evaluated, showing that a great flux recovery was achieved with the addition of PMS for the fouling caused by humic acid (HA).
膜分离与基于硫酸根自由基的高级氧化工艺（SR-AOPs）相结合可作为一种高效去除有机污染物的技术。将金属氧化物催化剂固定在陶瓷膜上可使膜分离技术兼具催化氧化功能，避免回收悬浮催化剂。在此，通过简单的球磨和煅烧工艺制备了具有不同钴负载量的纳米结构CoO陶瓷催化膜。CoO纳米颗粒在膜中的均匀分布为4-羟基苯甲酸（HBA）的催化氧化提供了充足的活性位点。开展了机理研究以确定反应性自由基，结果表明在催化过程中同时存在SO和OH，而SO起主导作用。还评估了复合Co@AlO膜的抗污染性能，结果表明，对于腐殖酸（HA）引起的污染，添加过一硫酸盐（PMS）后通量回收率很高。
