光催化耦合膜分离系统中缓解膜污染的研究进展

Research progress of fouling mitigation in photocatalysis coupled membrane filtration systems

光催化是一种环境友好型高级氧化技术,可有效降解有机污染物。膜分离技术作为一种高效分离技术已被广泛应用在水处理领域,但膜污染导致膜过滤性能降低,分离效率减弱,膜寿命缩短,运行成本增加,是膜分离技术进一步推广的限制因素。光催化耦合膜分离技术被认为是一种缓解膜污染的有效手段。系统综述了光催化耦合膜分离系统(PMRs)中膜污染缓解情况的最新研究,总结了PMRs的不同构型,并分析了不同构型的优、缺点及其应用前景;进一步以典型光催化剂二氧化钛为例,详细讨论了提高光催化效率的材料设计与改性策略,分析了耦合系统中膜污染问题缓解的机制,并展望了光催化耦合膜分离技术的未来发展趋势,以期为今后开展相关研究提供参考。

Photocatalysis is an environmentally friendly advanced oxidation technology,which can effectively de-grade organic pollutants.Membrane-based technology as an efficient separation approach has been widely used in the field of water treatment.However,membrane fouling is an obstacle for further application of membrane filtration,which would reduce membrane perm-selectivity,weaken separation efficiency,shorten membrane lifetime,and in-crease operation cost.Integrating photocatalysis into membrane filtration is considered as one of the effective means to alleviate membrane fouling.In this paper,the research progress of membrane fouling mitigation in photocatalysis coupled membrane filtration reactors(PMRs)systems was systematically reviewed.Firstly,the configurations and ap-plications of different PMRs were summarized,as well as the pros and cons of them were analyzed.Taking titanium dioxide as an example,the strategies to improve photocatalytic efficiency of PMRs were discussed.Then,the mecha-nism of membrane fouling mitigation in the integrating systems were analyzed.Finally,the development and applica-tions of PMR systems in the future were prospected.