Nanofiltration has attracted extensive attention in surface water purification and wastewater reclamation with its high permeance and effective interception of dissolved organic matter. However, the poor removal of trace organic contaminants and membrane fouling still limit its application, resulting in the potential health risk and excess energy consumption, respectively. Herein, an amine-quinone networks (AQN) coating coordinated by the 5-hydroxy-1,4-naphthoquinone (HNQ) and polyethyleneimine (PEI) was simply and facilely assembled on a commercial nanofiltration membrane. The optimum modified membrane conferred a significant increase in the rejection of trace organic contaminants (e.g., over 99% for ofloxacin). Simultaneously, the permeance of the modified membrane exhibited a slight enhancement (10%) over that of the pristine membrane thanks to the greater hydrophilicity of AQN coating without blocking pores of the polyamide layer. Static adsorption of BSA indicated that the NF-AQN membrane had excellent fouling resistance against proteins. In addition, after several cycles of dynamic fouling experiment, the higher flux recovery after physical cleaning and lower flux decline during filtration further demonstrated the outstanding antifouling property of the modified membrane. This study presents a low-cost, facile and scalable method using AQN coating for improving the performance of existing commercial nanofiltration membranes and alleviating their fouling in operation.

纳滤以其高渗透性和对溶解有机物的有效截留等优点，在地表水净化和废水再生中引起了广泛关注。然而，微量有机污染物去除效果不佳和膜污染仍然限制了其应用，分别导致潜在的健康风险和过多的能源消耗。在此，由 5-羟基-1,4-萘醌 (HNQ) 和聚乙烯亚胺 (PEI) 配位的胺-醌网络 (AQN) 涂层简单而容易地组装在商业纳滤膜上。优化的改性膜显着提高了对痕量有机污染物的截留率（例如，氧氟沙星的截留率超过 99%）。同时，由于 AQN 涂层具有更大的亲水性，而不会阻塞聚酰胺层的孔，因此改性膜的渗透性比原始膜略有提高 (10%)。BSA的静态吸附表明NF-AQN膜对蛋白质具有优异的抗污染性。此外，经过多轮动态结垢实验，物理清洗后通量恢复率较高，过滤过程中通量下降幅度较小，进一步证明了改性膜的优异抗污染性能。本研究提出了一种使用 AQN 涂层的低成本、简便且可扩展的方法，用于提高现有商业纳滤膜的性能并减轻其运行中的污染。BSA的静态吸附表明NF-AQN膜对蛋白质具有优异的抗污染性。此外，经过多轮动态结垢实验，物理清洗后通量恢复率较高，过滤过程中通量下降幅度较小，进一步证明了改性膜的优异抗污染性能。本研究提出了一种使用 AQN 涂层的低成本、简便且可扩展的方法，用于提高现有商业纳滤膜的性能并减轻其运行中的污染。BSA的静态吸附表明NF-AQN膜对蛋白质具有优异的抗污染性。此外，经过多轮动态结垢实验，物理清洗后通量恢复率较高，过滤过程中通量下降幅度较小，进一步证明了改性膜的优异抗污染性能。本研究提出了一种使用 AQN 涂层的低成本、简便且可扩展的方法，用于提高现有商业纳滤膜的性能并减轻其运行中的污染。物理清洗后更高的通量恢复和过滤过程中更低的通量下降进一步证明了改性膜的出色防污性能。本研究提出了一种使用 AQN 涂层的低成本、简便且可扩展的方法，用于提高现有商业纳滤膜的性能并减轻其运行中的污染。物理清洗后更高的通量恢复和过滤过程中更低的通量下降进一步证明了改性膜的出色防污性能。本研究提出了一种使用 AQN 涂层的低成本、简便且可扩展的方法，用于提高现有商业纳滤膜的性能并减轻其运行中的污染。