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使用选择性金属有机框架内嵌的混合矩阵膜回收稀土欧

Gabriela C Martins¹, Youngwoo Choo¹, Myoung Jun Park¹

¹School of Civil and Environmental Engineering, University of Technology Sydney (UTS), City Campus, Broadway, NSW, 2007, Australia.

|September 7, 2024

概括

这项研究引入了一种新的混合矩阵膜,用于高效地回收欧 (Eu³⁺). 膜选择性地将Eu³⁺集中在其他离子上,为稀土元素的回收提供了可持续的水电金解决方案.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
分离科学分离科学

背景情况:

稀土元素 (REEs) 对现代技术和可持续能源至关重要.
传统的REE生产方法对环境造成重大破坏.
开发可持续的水电金方法来回收REE是一个关键的研究领域.

研究的目的:

为了研究选择性欧 (Eu³⁺) 离子度的混合矩阵膜.
评估膜在复杂溶液中将Eu³⁺与竞争中的离子分离的性能.
评估用于实际应用的开发膜的稳定性和效率.

主要方法:

混合矩阵膜的制造,在硫化聚乙 (SPEK) 矩阵中包含欧选择性金属有机框架 (Cr-MIL-PMIDA).
膜的离子导电性和离子扩散性质的表征.
在不同的条件下 (例如pH5) 进行膜提取实验,以量化离子回收.

主要成果:

与其他多价离子相比,激活膜对Eu³⁺的离子导电性有所降低.
膜提取实验显示,Eu³⁺的扩散速度明显比Mg²⁺和Zn²⁺慢.
在pH值为5时,Eu³⁺的回收率为<4%,而Mg²⁺和Zn²⁺的回收率超过30%,这表明选择性很高.

结论:

复合膜对Eu³⁺具有强烈的选择性,这是由于其酸盐组与Eu³⁺之间的亲和力.
膜有效地抑制了Eu³⁺离子从散装溶液中的扩散和分离.
开发的复合膜和嵌入的MOF颗粒在水溶液中表现出极好的稳定性,长达12天.

关键词:

欧洲选择性选择性膜分离器的分离方式金属有机框架的框架.混合矩阵的膜膜.稀土元素是一种稀土元素.

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