Abstract

Extraction of Mn(II) and Co(II) from chloride solutions in the system with a hydrophobic deep eutectic solvent (HDES) based on di(2-ethylhexyl)phosphoric acid (D2EHPA) and menthol is studied depending on the aqueous phase acidity, the HDES composition, the concentration of chloride ions, and the volume ratio of the system phases. The extraction mechanism for the studied metals is established. A thermodynamic analysis of the extraction process in the proposed system is carried out. Evaluation of the possibility of reusing the HDES D2EHPA/menthol on the example of the extraction of Mn(II) ions is performed for the first time. The potential for the application of the proposed HDES for isolation of metals from aqueous solutions is demonstrated.

中文翻译：

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用二(2-乙基己基)磷酸/薄荷醇低共熔溶剂从氯化物溶液中萃取Mn(II)和Co(II)

摘要

研究了基于二(2-乙基己基)磷酸 (D2EHPA) 和薄荷醇的疏水性低共熔溶剂 (HDES) 从系统中的氯化物溶液中萃取 Mn(II) 和 Co(II)，具体取决于水相酸度， HDES 组成、氯离子浓度以及系统各相的体积比。建立了所研究金属的萃取机理。对所提出的系统中的萃取过程进行了热力学分析。首次以 Mn(II) 离子萃取为例评估了 HDES D2EHPA/薄荷醇重复使用的可能性。证明了所提出的 HDES 在从水溶液中分离金属方面的应用潜力。