writer：Liu Ye, Yingbo Chen*, Linzhe Xu, Shuang Fu, Xintong Wu
keywords：Hollow fiber nanofiltration; Dynamic LBL assembly; Wastewater treatment
source：期刊
specific source：Journal of Taiwan Institute of Chemical Engineering 172 (2025) 106146
Issue time：2025年

Journal of Taiwan Institute of Chemical Engineering 172 (2025) 106146

DOI: 10.1016/j.jtice.2025.106146

The stability of nanofiltration membranes in wastewater treatment represents a primary constraint to their development. In this work, hollow fiber nanofiltration membranes with robust stability were prepared by dynamic layer-by-layer (LBL) assembly of poly (sodium 4-benzenesulfonate) (PSS) and poly (diallyldimethyl ammonium chloride) (PDDA) on the internal surface of poly (ether sulfone) (PES) hollow fiber ultrafiltration membranes. The effect of different coating layers on the membrane performance was assessed, and the findings revealed that the LBL membrane with the optimal coating layer of 2 had a pure water permeance of 9.59 L·m?2·h?1·bar?1 with rejection of 92.11% and 87.28% for Na2SO4 and MgSO4, respectively. Consistent pure water permeance was attained even after four cycles of anti-fouling testing, at varied pH values and backwashing. In the actual wastewater treatment, the membrane still maintained a stable permeance, the rejection of Ca2+, Mg2+ and SO42? ions in the wastewater were 81.25%, 87.81% and 76.79% respectively, and the rejection of total organic carbon reached up to 92.90%. In summary, the membranes that had been developed exhibit economic efficiency and held significant potential for use in industrial production and real wastewater treatment procedures.