writer：Liu Ye, Xuyang Liu, Yingbo Chen*, Linzhe Xu, Shuang Fu, Xintong Wu
keywords：Hollow fiber nanofiltration membrane; Fe3+/tannic acid; Salt tolerance
source：期刊
specific source：Journal of Environmental Chemical Engineering 13 (2025) 118378
Issue time：2025年

Journal of Environmental Chemical Engineering 13 (2025) 118378

DOI: 10.1016/j.jece.2025.118378

In this study, a hollow fiber nanofiltration membrane with excellent salt tolerance and anti-fouling properties was successfully prepared by Fe3+/tannic acid (TA) assisted dynamic assembly technology. The results showed that when the concentration of Fe3+ and TA was 0.1 g·L?1, the rejection rate of Na2SO4 was 91.34%, and the permeability was 12.44 L·m?2·h?1·bar?1. The salt tolerance test showed that the rejection rate did not change significantly in the range of 1–5 g·L?1 Na2SO4 concentration. The rejection rate of the membrane to 5 g·L?1 Na2SO4 solution was 85.22%, thanking to the strong binding force between the Fe3+-TA coordination bonds. The high hydrophilicity of the coating layer and the dense structure of the Fe3+-TA coordination network significantly reduced the irreversible adsorption of pollutants, which provided the membrane with stable permeability after three times of fouling-cleaning cycles with bovine serum albumin (BSA) and humic acid (HA) as model pollutants. The dense network structure formed by dynamic assembly assisted with Fe3+-TA coordination was the key to the high rejection and salt tolerance of the membrane, which provided a new strategy for the development of high-performance nanofiltration membranes for high-salt wastewater treatment in practical applications.