Catalytic membrane can achieve sieving separation and advanced oxidation simultaneously, which can improve the effluent water quality while reducing membrane fouling. In this study, the catalytic membranes (M²⁺Al@AM) were fabricated by loading different binary layered metal oxides (M²⁺Al-LMO: MnAl-LMO, CuAl-LMO and CoAl-LMO) on alumina ceramic substrate membranes (AM) via vacuum filtration followed by calcination process. The performance of the catalytic membranes was investigated by filtering actual surface water. It was found that the presence of peroxymonosulfate (PMS) could mitigate membrane fouling effectively, as evidenced by the increase of normalized flux from 0.28 to 0.62 in CoAl@AM/PMS system, from 0.25 to 0.52 in CuAl@AM/PMS system, and from 0.22 to 0.31 in MnAl@AM/PMS system, respectively. Correspondingly, the CoAl@AM exhibited the highest removal for UV₂₅₄, TOC and fluorescent components in the surface water, followed by CuAl@AM and MnAl@AM. Quenching effect of phenol and furfuryl alcohol proposed the surface-bound radicals and singlet oxygen were the major reactive oxygen species in the M²⁺Al@AM/PMS systems. Interface free energy calculations confirmed the in-situ PMS activation could enhance the repulsive interactions between NOM and the membranes, thus mitigating membrane fouling. This work provides an original but simple strategy for catalytic ceramic membrane preparation and new insights into the mechanism of membrane fouling mitigation in catalytic membrane system.

催化膜可同时实现筛分分离和高级氧化，在改善出水水质的同时减少膜污染。在这项研究中，催化膜（M ²⁺ Al@AM）是通过负载不同的二元层状金属氧化物（M ²⁺Al-LMO: MnAl-LMO、CuAl-LMO 和 CoAl-LMO) 在氧化铝陶瓷基底膜 (AM) 上通过真空过滤和煅烧工艺。通过过滤实际的地表水来研究催化膜的性能。发现过一硫酸盐 (PMS) 的存在可以有效地减轻膜污染，CoAl@AM/PMS 系统中的归一化通量从 0.28 增加到 0.62，CuAl@AM/PMS 系统中的归一化通量从 0.25 增加到 0.52 证明了这一点，并且在 MnAl@AM/PMS 系统中分别从 0.22 到 0.31。相应地，CoAl@AM 对 UV _{254的去除率最高}、TOC和地表水中的荧光成分，其次是CuAl@AM和MnAl@AM。苯酚和糠醇的猝灭效应表明，表面结合的自由基和单线态氧是 M ²⁺ Al@AM/PMS 体系中的主要活性氧物种。界面自由能计算证实原位 PMS 活化可以增强 NOM 与膜之间的排斥相互作用，从而减轻膜污染。这项工作为催化陶瓷膜的制备提供了一种原始而简单的策略，并为催化膜系统中膜污染缓解机制提供了新的见解。