State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China.
Sci Total Environ. 2021 Mar 25;762:143083. doi: 10.1016/j.scitotenv.2020.143083. Epub 2020 Oct 17.
Multifunctional ultrafiltration membranes, which achieve ultrafiltration and additional functions in one unit, are a new strategy developed in recent years for wastewater treatment. In this mini review, we summarized and commented on the development of adsorptive and catalytically oxidative multifunctional ultrafiltration membranes, as well as pointed out possible further trends. The main methods for membrane preparation, i.e., blending, surface coating, reverse filtration, etc., were summarized, and the advantages and disadvantages of each method were discussed. In addition, the key criteria which influence the performance of membranes, including the efficiency of additional functions, original ultrafiltration, permeance, and stability, were analyzed. Furthermore, we introduced the applications of different classes of multifunctional ultrafiltration membranes, and tried to further analyzed some examples of multifunctional ultrafiltration membranes used for adsorption and catalytic oxidation. The most significant advantage of this technology is the high efficiency for the simultaneous removal of different kinds of pollutants or for the removal of one kind of pollutant during the deep treatment of multicomponent wastewater. However, some challenges still oppose the practical application of multifunctional ultrafiltration. We believe that breaking the trade-off between the high efficiency of additional functions and high flux, strengthening the stability of the membranes, achieving synergistic effects between multi-effect functions, and investigating the interaction mechanisms between active materials and the membrane are key points for further research.
多功能超滤膜在一个单元中实现超滤和其他功能，是近年来开发的一种用于废水处理的新策略。在这篇小型综述中，我们总结和评论了吸附和催化氧化多功能超滤膜的发展，并指出了可能的进一步趋势。综述了膜制备的主要方法，如共混、表面涂层、反滤等，并讨论了每种方法的优缺点。此外，还分析了影响膜性能的关键标准，包括附加功能的效率、原始超滤、渗透率和稳定性。此外，我们介绍了不同类型多功能超滤膜的应用，并尝试进一步分析了一些用于吸附和催化氧化的多功能超滤膜的实例。该技术的最大优势在于能够同时去除不同种类的污染物，或在多组分废水的深度处理中去除一种污染物，效率很高。然而，一些挑战仍然阻碍了多功能超滤的实际应用。我们认为，打破高效附加功能与高通量之间的权衡、增强膜的稳定性、实现多效应功能之间的协同效应以及研究活性材料与膜之间的相互作用机制是进一步研究的关键点。
