Abstract Cr(VI) anion-imprinted composite membranes (Cr(VI)-IICM1∼23) based on a designed functional monomer N,N'-(ethane-1,2-diyl)bis(2-methylacrylamide) (EBMA) were synthesized via surface-grafting. Using nylon-6 membrane for support, the main imprinting parameters, i.e., the functional monomer and crosslinker dosages, membrane soaking times, and porogen solvent ratios were optimized. The morphology and surface area of the optimum imprinted composite membrane (Cr(VI)-IICM11) were characterized by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The effects of the Cr(VI) anion concentration, adsorption time, temperature, and pH on adsorption were investigated. Additionally, the permeation, mass transfer, and adsorption of the Cr(VI)-IICM11 were characterized for aqueous Cr(VI) anions. The adsorption capacity and imprinting factor of the Cr(VI)-IICM11 in the imprinting solution were high, and the membrane had good permeation selectivity for Cr(VI) anions. Additionally, Cr(VI)-IICM11 efficiently adsorbed aqueous Cr(VI) anions. These results suggest that EBMA was a suitable functional monomer for Cr(VI) anions serving as the template. Therefore, Cr(VI)-IICM is a suitable material for adsorbing and separating Cr(VI) anions in complex, aqueous solutions.

中文翻译：

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具有专门设计的功能单体的铬 (VI) 离子印迹复合膜的制备和表征

摘要 基于设计的功能单体 N,N'-(乙烷-1,2-二基)双 (2-甲基丙烯酰胺) (EBMA) 制备了 Cr(VI) 阴离子印迹复合膜 (Cr(VI)-IICM1∼23)通过表面接枝合成。使用尼龙6膜作为载体，优化了主要的印迹参数，即功能单体和交联剂的用量、膜浸泡时间和致孔剂溶剂比例。通过扫描电子显微镜（SEM）和Brunauer-Emmett-Teller（BET）分析表征了最佳印迹复合膜（Cr（VI）-IICM11）的形态和表面积。研究了 Cr(VI) 阴离子浓度、吸附时间、温度和 pH 值对吸附的影响。此外，Cr(VI)-IICM11 的渗透、传质和吸附对水性 Cr(VI) 阴离子进行了表征。Cr(VI)-IICM11在印迹溶液中的吸附容量和印迹因子较高，膜对Cr(VI)阴离子具有良好的渗透选择性。此外，Cr(VI)-IICM11 有效地吸附了水性 Cr(VI) 阴离子。这些结果表明 EBMA 是作为模板的 Cr(VI) 阴离子的合适功能单体。因此，Cr(VI)-IICM 是一种适用于在复杂的水溶液中吸附和分离 Cr(VI) 阴离子的材料。