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首页> 外文期刊>RSC Advances >A polymer inclusion membrane composed of the binary carrier PC-88A and Versatic 10 for the selective separation and recovery of Sc
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A polymer inclusion membrane composed of the binary carrier PC-88A and Versatic 10 for the selective separation and recovery of Sc

机译：由二元载体PC-88A和Versatic 10组成的聚合物包合物膜，用于选择性分离和回收Sc

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This study reports on the selective separation of scandium (Sc) from other rare earth metals (REMs) using a polymer inclusion membrane (PIM). The PIM prepared with PC-88A (2-ethylhexyl hydrogen-2-ethylhexylphosphonate) alone as the carrier showed high extractability but the poor back-extraction of the extracted Sc ~(3+) ions did not allow the transport of these ions to the receiving solution of a membrane transport system. To overcome this problem, a novel approach was introduced using a mixture of carriers that allowed Sc ~(3+) transport into the receiving solution. A cellulose triacetate (CTA) based PIM containing both PC-88A and Versatic 10 (decanoic acid) as carriers and dioctyl phthalate (DOP) as a plasticizer was prepared for the selective separation of Sc ~(3+) from other REM ions in nitrate media. The membrane composition was optimized and the effect of operational parameters such as pH of the feed solution and composition of the receiving solution was explored. The flux at the membrane/feed solution interface was found to depend significantly on the carrier concentration in the PIM, pH of the feed solution and the receiving solution acidity. The newly developed PIM allowed quantitative and selective transport of Sc ~(3+) thus demonstrating its suitability for the selective recovery of this metal.
机译：这项研究报告了使用聚合物包裹膜（PIM）将separation（Sc）与其他稀土金属（REM）选择性分离的研究。仅以PC-88A（2-乙基己基氢-2-乙基己基膦酸酯）为载体制备的PIM具有较高的可萃取性，但萃取后的Sc〜（3+）离子的反萃取差，因此无法将这些离子转运至接收膜运输系统的溶液。为了克服这个问题，引入了一种新颖的方法，使用了允许Sc〜（3+）传输到接收溶液中的载体混合物。制备了基于三乙酸纤维素（CTA）的PIM，该PC既包含PC-88A也包含Versatic 10（癸酸）作为载体，而邻苯二甲酸二辛酯（DOP）作为增塑剂，用于从硝酸盐中的其他REM离子中选择性分离Sc〜（3+）媒体。优化了膜的组成，并研究了操作参数（例如进料溶液的pH和接收溶液的组成）的影响。发现膜/进料溶液界面处的通量显着取决于PIM中的载流子浓度，进料溶液的pH和接收溶液的酸度。新开发的PIM可以定量和选择性地运输Sc〜（3+），从而证明了其对选择性回收这种金属的适用性。

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