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基于离子液体的聚合物包容膜用于金属离子的选择性分离

Adrián Hernández-Fernández¹, Eduardo Iniesta-López¹, Anahí Ginestá-Anzola²

¹Department of Chemical Engineering, Faculty of Chemistry, University of Murcia (UMU), P.O. Box 4021, Campus de Espinardo, E-30100 Murcia, Spain.

|September 27, 2023

概括

聚合离子液体膜有效地分离金属离子. 甲基三基氨基化物/PVC膜对Zn (II) /Cu (II) 和Zn (II) /Fe (III) 分离具有很高的选择性.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

聚合离子液体包容膜 (PIILMs) 是用于选择性分离的先进材料.
在各种工业和环境应用中,有效的金属离子分离,如Fe (III),Zn (II),Cd (II) 和Cu (II) 是至关重要的.
盐酸溶液对膜稳定性和金属离子回收构成挑战.

研究的目的:

调查基于聚乙烯的PIILM用于选择性金属离子分离的使用情况.
为了评估不同离子液体/聚合物组合在酸性水溶液中的稳定性.
用优化的PIILMs来确定各种金属离子混合物的分离因子.

主要方法:

使用聚乙烯 (PVC) 作为基聚合物的PIILMs的制备和表征.
两种不同的离子液体的合并:1-octyl-3-methylimidazolium hexafluorophosphate ([omim+][PF6-]) 和甲基三甲基化物 ([MTOA+][Cl-]).
长时间 (2048小时) 对含有目标金属离子的1M HCl溶液进行膜的稳定性测试.

主要成果:

[omim+][PF6-]/PVC (30/70) 和[MTOA+][Cl-]/PVC (70/30) 膜表现出良好的稳定性,分别保留了82%和48%的离子液体.
[MTOA+][Cl-]/PVC膜在分离 Zn(II) /Cu(II) (分离因子1996) 和 Zn(II) /Fe(III) (分离因子606) 混合物方面表现出高的选择性.
同时,Cd (II) /Cu (II) 混合物的分离也得到了满意的分离,分离因子为112.

结论:

选择离子液和基聚合物比率对于开发有效的PIILMs至关重要.
PIILMs为从水溶液中选择性分离有价值或有毒的金属离子提供了一个有希望的方法.
[MTOA+][Cl-]/PVC膜显示出有针对性的金属离子回收应用的巨大潜力.

关键词:

离子液体是有离子的液体.离子凝 (Ionogel) 是一种金属离子金属离子聚合物纳入膜是一种聚合物纳入膜.分离式隔离器的使用方法稳定的稳定性稳定的稳定性

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