New Insights on Y, La, Nd, and Sm Extraction with Bifunctional Ionic Liquid Cyphos IL 104 Incorporated in a Polymer Inclusion Membrane.

IF 3.3 4区 工程技术 Q2 CHEMISTRY, PHYSICAL Membranes Pub Date : 2024-08-23 DOI:10.3390/membranes14090182
Mohamed Malki, Lynda Mitiche, Amar Sahmoune, Clàudia Fontàs
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Abstract

In this study, an ionic liquid-based polymer inclusion membrane (IL-PIM) made of (50% polymer-50% CyphosIL104) was used to extract and separate the rare earth elements (REEs) Y, La, Nd, and Sm in chloride solutions. The effect of extraction time and pH was studied to optimize the extraction and separation conditions. The four REEs were effectively extracted at pH 4-5 from both single and mixed metals solutions. However, at pH 2, only Y was extracted. The recovery of the extracted REEs from the loaded PIM was achieved using HNO3 and H2SO4. In the case of La, it was quantitatively back-extracted with H2SO4 after a contact time of 1 h, while up to 4 h was necessary to recover 70% of the extracted Y, Sm, and Nd. Extraction isotherms were studied, and the Freundlich isotherm model was the most adequate to describe the interaction between the PIM and the REEs. Finally, the developed PIM was investigated for the extraction of REEs from mixtures containing other metals, which showed great selectivity for the REEs.

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双功能离子液体 Cyphos IL 104 与聚合物包合膜结合萃取 Y、La、Nd 和 Sm 的新见解。
本研究利用由(50% 聚合物-50% CyphosIL104)制成的离子液体基聚合物包涵膜(IL-PIM)来萃取和分离氯化物溶液中的稀土元素(REEs)Y、La、Nd 和 Sm。研究了萃取时间和 pH 值的影响,以优化萃取和分离条件。在 pH 值为 4-5 时,四种稀土元素都能从单一金属和混合金属溶液中有效萃取出来。然而,在 pH 值为 2 时,只有钇被萃取出来。使用 HNO3 和 H2SO4 可以从负载的 PIM 中回收萃取的 REEs。就 La 而言,用 H2SO4 进行定量反萃取的接触时间为 1 小时,而要回收所萃取的 70% 的 Y、Sm 和 Nd 则需要长达 4 小时。对萃取等温线进行了研究,发现 Freundlich 等温线模型最适合描述 PIM 与 REEs 之间的相互作用。最后,研究了所开发的 PIM 从含有其他金属的混合物中萃取 REEs 的情况,结果表明该 PIM 对 REEs 具有很高的选择性。
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来源期刊
Membranes
Membranes Chemical Engineering-Filtration and Separation
CiteScore
6.10
自引率
16.70%
发文量
1071
审稿时长
11 weeks
期刊介绍: Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.
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