An ion-imprinted polymer (IIP) with monophosphonic groups was prepared by thermal copolymerization. Bis(2-methacryloxyethyl) phosphate (BMAOP) was used as functional monomer to react with Fe 3+ in dimethyl sulfoxide (DMSO). Ethylene glycol dimethacrylate (EGDMA) was used as cross-linker during polymerization process. A suitable molar ratio of BMAOP to Fe 3+ was investigated by UV/Vis/NIR Spectrometer and ICP-OES. The obtained results showed that the monophosphonic groups could be selectively combined with Fe 3+ in solutions containing other coexisting ions, and the selectivity could be further enhanced by ion-imprinted process. The prepared IIP was used for removing trace Fe 3+ from high concentration basic chromium sulfate solutions. After adsorption process, the concentration of Fe 3+ could be reduced from 4.486mg L −1 to 0.171mg L −1 , which was much lower than the concentration in the solution treated by non-imprinted polymer (NIP). Moreover, the IIP exhibited excellent recyclability after six adsorption-desorption cycles.

中文翻译：

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用于从高浓度碱性硫酸铬溶液中去除 Fe3+ 的单膦酸基官能化离子印迹聚合物

通过热共聚制备了具有单膦酸基团的离子印迹聚合物（IIP）。双（2-甲基丙烯酰氧基乙基）磷酸酯（BMAOP）用作功能单体，在二甲基亚砜（DMSO）中与Fe 3+ 反应。乙二醇二甲基丙烯酸酯（EGDMA）在聚合过程中用作交联剂。通过UV/Vis/NIR光谱仪和ICP-OES研究了BMAOP与Fe 3+ 的合适摩尔比。所得结果表明，单膦酸基团可以在含有其他共存离子的溶液中选择性地与Fe 3+ 结合，并且通过离子印迹工艺可以进一步提高选择性。制备的 IIP 用于去除高浓度碱性硫酸铬溶液中的痕量 Fe 3+ 。经过吸附过程，Fe 3+ 的浓度可以从4.486mg L -1 降低到0.171mg L -1 ，这远低于非印迹聚合物 (NIP) 处理的溶液中的浓度。此外，在六个吸附-解吸循环后，IIP 表现出优异的可回收性。