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分别将N-甲基咪唑和N-丁基咪唑通过共价键固定于树脂载体上,制备了固载化甲基咪唑离子液体(MCl)和固载化丁基咪唑离子液体(BCl),MCl和BCl可作为一种新型的强碱型阴离子交换树脂。研究了MCl和BCl对盐酸体系中Fe(III)的吸附性能,其吸附平衡时间为6h,拟二级动力学模型能更好地描述MCl和BCl对Fe(III)的吸附动力学过程;随着温度的升高,MCl和BCl对Fe(III)的吸附量增大,表明该过程是一个吸热反应,在298K时,MCl和BCl对Fe(III)的最大吸附量分别为24.9mg/g和71.1mg/g;随着盐酸浓度的增加,MCl和BCl对Fe(III)的吸附量增大,而且溶液中Cl-浓度的增加,也会提高MCl和BCl对Fe(III)的吸附量。MCl和BCl可从盐酸体系中回收Fe(III),而且BCl的效果要优于MCl。
N-methylimidazole and N-butylimidazole were covalently immobilized on the resin carrier, respectively. The immobilized methylimidazolium ionic liquid (MCl) and the immobilized butylimidazolium ionic liquid (BCl) And BCl can be used as a new type of strong base anion exchange resin. The adsorption performance of Fe (III) on MCl and BCl was studied. The adsorption equilibrium time was 6h. The pseudo-second order kinetic model could better describe the adsorption kinetics of Fe (III) to MCl and BCl. With the increase of temperature, the adsorption amount of Fe (III) by MCl and BCl increased, indicating that the process was an endothermic reaction. At 298 K, the maximum adsorption capacity of Fe (III) for MCl and BCl was 24.9 mg / g and 71.1 mg / g respectively. With the increase of hydrochloric acid concentration, the amount of Fe (III) adsorbed by MCl and BCl increased, and the increase of Cl- concentration also increased the adsorption of Fe (III) by MCl and BCl the amount. MCl and BCl can recover Fe (III) from hydrochloric acid system, and the effect of BCl is better than that of MCl.