Abstract:

The printing and dyeing industry consumes a lot of water and produces a large amount of dye wastewater, which limits the green and sustainable development of the textile industry. As a new separation technology, nanofiltration (NF) which utilizes NF membrane as a medium to separate dyes from dye wastewater has been widely used in recent years due to its high separation efficiency and low energy consumption. The dyes in dying wastewater can be separated and recycled without dye degradation during the NF process. However, the NF membrane still has the problems, such as low flux rate, poor thermal stability and poor antifouling ability. In this review, the research progress of preparation and modification of NF membrane for dying wastewater treatment is reviewed. Firstly, the preparation methods of NF membrane including phase inversion, interfacial polymerization, co-deposition, layer-by-layer self-assembly, surface coating and surface grafting are introduced. Secondly, the modification of NF membranes, such as hydrophilic modification, chlorine resistance modification, antibacterial modification, high mechanical properties and thermal stable NF membrane is summarized. Furthermore, the challenges of NF membranes in preparation and application in harsh environments are pointed out. Finally, some perspectives on promising methods for improving the performance of NF membrane are provided.

Key words: nanofiltration, preparation, modification, nanoparticle additive, dying wastewater

摘要：

印染行业耗水多，并产生大量染料废水，限制了相关行业的绿色和可持续发展。传统染料废水处理方法局限颇多，作为一种新型分离技术，纳滤膜分离技术能够高效分离染料废水中的染料，进而实现染料废水的清洁处理和可用资源的回收利用，具有能耗低和分离效率高的优点，但所用纳滤膜仍存在通量低、耐热性能和抗污染性能差等问题。本文介绍了染料废水处理用纳滤膜制备及改性研究进展，重点综述了包括相转化法、界面聚合法、表面仿生沉积法、层层自组装法、表面涂覆法和表面接枝法等纳滤膜制备方法，分析了纳滤膜亲水改性、耐氯改性、抗菌改性、机械性能改性和耐高温改性等功能化改性的意义。最后指出目前纳滤膜在制备和应用时存在的问题，并对未来纳滤膜在改进现有制膜工艺，开发新型膜材料和探索新的制膜工艺等方面的研究进行了展望。

关键词: 纳滤膜, 制备方法, 功能化改性, 纳米添加剂, 染料废水