1-(3-Aminopropyl) imidazole (APIm) modified ultrafiltration (UF) membrane for mitigating alginate fouling caused by calcium

文献类型： 外文期刊

第一作者： Wu, Lei

作者： Wu, Lei;Liu, Menghan;Ma, Cong;Chen, Yuting;Li, Ming;Yin, Tingting;Fan, Wei

作者机构：

关键词： UF; APIm; Membrane fouling; Sodium alginate; Calcium

期刊名称：CHEMICAL ENGINEERING SCIENCE （ 影响因子：4.3； 五年影响因子：4.3 ）

ISSN： 0009-2509

年卷期： 2025 年 302 卷

页码：

收录情况： SCI

摘要： UF is widely used as a wastewater treatment and recycling technology. However, membrane fouling is still an important factor affecting the wide application. In this study, APIm with positive amino group was adsorbed to the surface of the carboxylated polyacrylonitrile (PAN) membrane by electrostatic force to reduce the fouling of sodium alginate (SA) caused by Ca2+. The results show that 1 v/v% APIm was selected as the optimal dosage, accompanied by the highest water flux of 330.5 L.m(-2)h(-1) bar(-1) and bovine serum albumin (BSA) rejection rate of 91.0%. When the concentration of Ca2+ was increased to 10 mM, the Ca2+ catch amount increased to 48.25 mg/cm(2). The main anti-fouling mechanism was that APIm captured a certain amount of Ca2+ in situ, destroyed the complex structure of sodium alginate (SA) and Ca2+. Then the fouling layer was easy to be removed by physical cleaning. At the concentration of 10 mM Ca2+, the membrane flux recovery rate of 1 v/v% APIm membrane was increased to 80.1 %. This study demonstrates a fouling control strategy for in-situ removal of Ca2+ bound SA fouling, providing a new approach for the future development of UF membrane.

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