Abstract Nanofiltration membranes offer advantages to address enormous demands for textile water treatment. To meet omnipresent challenges of dye/salt selectively and antifouling performance, an efficient dye desalting and antifouling nanofiltration (NF) membrane was developed by virtue of zwitterionic functionalized monomer (zwitterionic N,N-Bis(3-aminopropyl)methylamine, ZDNMA). The structures of zwitterionic membranes can be tailored to suit the separation performance and antifouling property. The prepared zwitterionic NF membrane shows superior removal performance of methyl blue and penetration capacity of NaCl due to zwitterion desirable features of accelerating NaCl transportation. Thus, the membrane selectivity factor for NaCl/methyl blue can be as high as 857.0, accompanied by pure water flux of 10.67 L m-2 h-1 bar-1. When dealing with 0.3 g L-1 MYB and 4 g L-1 NaCl mixture solution, a high NaCl removal was achieved in 75.8% with about 8.1% dye loss after dye purification process. Furthermore, the membrane revealed antifouling performance with a 94.9% flux recovery ratio. The zwitterionic NF membrane highlights more exceptional dye desalination performance, which renders a vast potential for practical textile effluent.

中文翻译：

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用于高效染料/盐选择性分离的两性离子功能化单体防污纳滤膜的开发

摘要 纳滤膜在满足纺织水处理的巨大需求方面具有优势。为了应对染料/盐选择性和防污性能方面无处不在的挑战，利用两性离子功能化单体（两性离子 N,N-双（3-氨基丙基）甲胺，ZDNMA）开发了一种高效的染料脱盐和防污纳滤（NF）膜。可以定制两性离子膜的结构以适应分离性能和防污性能。由于两性离子加速NaCl传输的理想特性，制备的两性离子NF膜显示出优异的甲基蓝去除性能和NaCl渗透能力。因此，NaCl/甲基蓝的膜选择性因子可高达857.0，同时纯水通量为10.67 L m-2 h-1 bar-1。处理 0 时。3 g L-1 MYB 和 4 g L-1 NaCl 混合溶液，在染料纯化过程后实现了 75.8% 的高 NaCl 去除率和约 8.1% 的染料损失。此外，该膜具有防污性能，通量回收率为 94.9%。两性离子 NF 膜突出了更卓越的染料脱盐性能，这为实际纺织废水提供了巨大的潜力。