Solvent extraction of Th(IV) from aqueous solution with methylimidazole in ionic liquid-Reference-Cited by-同舟云学术

Solvent extraction of Th(IV) from aqueous solution with methylimidazole in ionic liquid

Published:2016-06-08 Issue:10 Volume:104 Page:681-690
ISSN:2193-3405
Container-title:Radiochimica Acta
language:en
Short-container-title:

Author:

Li Wenkui¹,Yang Shenghua²,Lv Hui¹,Liu Ziyi¹,Wu Jianrong¹,Li Shun¹,Shen Yinglin¹

Affiliation:

1. Radiochemistry Laboratory, Lanzhou University, Lanzhou 730000, P. R. China

2. State Key Laboratory of Applied Organic Chemistry, Lanzhou 730000, P. R. China

Abstract

Abstract An extraction of Th(IV) was performed using 1- methylimidazole (1-MIM) or 2-methylimidazole (2-MIM) as the extractant in imidazolium type ionic liquids (ILs) or n-pentanol. The extractability for Th4+ in ILs was by far higher than that obtained in n-pentanol. The extraction mechanism was determined by slope analysis and ESI-MS. The transfer of Th4+ with MIM into ILs proceeded through both a cationic exchange and a neutral solvation mechanism, whereas the partitioning of Th4+ with MIM into n-pentanol only underwent a neutral solvation mechanism. The thermodynamic parameters values (ΔH, ΔS and ΔG) for extraction of Th4+ with 1-MIM in IL were calculated and the results indicated the extraction reaction was spontaneous and went through endothermic process. Separation of Th4+ from the solution of lanthanides (III) and uranium was also carried out by 1-MIM in ILs and n-pentanol.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/ract-2015-2450/pdf

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