基于层间距调控的二硫化锡复合膜制备及去除溶解性有机物的作用机理研究

针对地表水膜处理过程中的膜污染问题，研发层状二硫化锡复合膜的制备及优化，开展其对溶解性有机物去除的效能评价及微观界面作用机理探讨。通过优化组装成膜和熟化方式，氧化石墨烯改性，优选交联剂和基底材料，精准调控功能层厚度和层间距，形成稳定性强、透水性好和选择性高的二硫化锡复合膜制膜技术，为分离膜在水处理应用中的“通量-选择平衡效应”瓶颈提供解决方案。开展二硫化锡复合膜对典型有机物和天然有机物的去除效能及筛分截留、光催化自清洗和滤饼层形成等过程研究，揭示有机物在膜组装层和膜表面的微观界面分离作用机理，为深入解析二硫化锡复合膜过滤除污染过程提供理论基础，以期开发出具有靶向有机物去除功能的新一代水处理膜材料。

In order to solve the membrane fouling problem in surface water treatment, an SnS2 membrane with stratified structure will be fabricated with its performance optimized. In addition, its effect on the dissolved organic matter removal and the micro-interface mechanism will be also investigated. The strong stability and high selectivity and permeability of the composite membrane will be obtained through adjusting the fabrication and curing methods, modifying with GO, and selecting proper cross-linking agents and supporting materials, as well as controlling the SnS2 function layer depth and spacing. This study shall provide solutions to balance the permeability-selectivity trade-off effect of membranes in water treatment. The removal of typical dissolved organic matter and natural organic matter, as well as the associated sieving effect, photocatalytic self-cleaning and cake layer formation mechanism of the composite membrane shall be deeply studied, such that the separation mechanism of organic matter in the function layer or on the membrane surface can be revealed, and the process of SnS2 composite membrane for fouling removal can be further understood. This study shall provide useful information of advanced membrane fabrication technology for target organic matter removal in water treatment.