Effect of bis(methylimidazolium) ionic liquid on the extraction of actinides and lanthanides with bis(carbamoylmethylphosphine oxide) extractant from nitric acid solutions
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Alexander N. Turanov
, Оleg I. Аrtyushin
Abstract
A novel bis(methylimidazolium) ionic liquid 3,3′-(pentane-1,5-diyl) bis(1-methylimidazolium) bis(trifluoromethanesulfonul)imide [C5(mim)2][Tf2N]2 has been synthesized. Its effect on the extraction of U(VI), Th(IV), Am(III), and lanthanides(III) from nitric acid solutions with a polydentate neutral bis(carbamoylmethylphosphine oxide) ligand L containing two bidentate fragments Ph2P(O)CH2C(O)NH–, interconnected by 4,7,10-trioxatridecane spacer through amide nitrogen atoms has been investigated. The efficiency of the extraction of metal ions with solutions of L in 1,2-dichloroethane (DCE) significantly increases in the presence of [C5(mim)2][Tf2N]2. A synergistic effect in the extraction of metal ions in this system has been explained with the high hydrophobicity of the Tf2N− anions, which are involved in the formation of extracted complexes as counterions. The value of the synergistic effect decreases with increasing acidity of the aqueous phase. The influence of the composition of the aqueous and organic phases on the efficiency of the extraction of metal ions into the organic phase is considered, and the stoichiometry of the extracted complexes is determined. The effect of the HTf2N coextraction with L on the extraction of metal ions in the L – [C5(mim)2][Tf2N]2 system is discussed. The synergistic effect in the extraction of Ln(III) from 3 M HNO3 solutions with the mixture of L and [C5(mim)2][Tf2N]2 in DCE is higher than that in the L – [C4mim][Tf2N] – DCE system.
Acknowledgments
The study was performed within the framework of the government assignment for the ISSP RAS, IMTHPM RAS, IPCE RAS and INEOS RAS (Contract/agreement No. 075-03-2023-642) and was financially supported by the Ministry of Science and Higher Education of the Russian Federation using the equipment of the Centre for Molecular Structure Studies, INEOS RAS and using equipment of CKP FMI IPCE RAS.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2023 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Papers
- Incomplete fusion reaction producing Pa nuclides in the 232Th + 7Li reaction
- First investigations on a CHON UNEX process
- Effect of bis(methylimidazolium) ionic liquid on the extraction of actinides and lanthanides with bis(carbamoylmethylphosphine oxide) extractant from nitric acid solutions
- Challenges in correlating oxygen stable isotope ratios of hydrates on uranium ore concentrates to process waters
- Fabrication of pyrite-zero nickel composites for efficient removal of Se(IV) from aqueous solution
- Analytical chemistry of some trace elements in Tamarix gallica L. using instrumental neutron activation analysis (INAA)
- Utilization of electron beam irradiated carboxymethyl cellulose/polyvinyl alcohol/banana peels composite film for remediation of dyes from wastewater
Articles in the same Issue
- Frontmatter
- Original Papers
- Incomplete fusion reaction producing Pa nuclides in the 232Th + 7Li reaction
- First investigations on a CHON UNEX process
- Effect of bis(methylimidazolium) ionic liquid on the extraction of actinides and lanthanides with bis(carbamoylmethylphosphine oxide) extractant from nitric acid solutions
- Challenges in correlating oxygen stable isotope ratios of hydrates on uranium ore concentrates to process waters
- Fabrication of pyrite-zero nickel composites for efficient removal of Se(IV) from aqueous solution
- Analytical chemistry of some trace elements in Tamarix gallica L. using instrumental neutron activation analysis (INAA)
- Utilization of electron beam irradiated carboxymethyl cellulose/polyvinyl alcohol/banana peels composite film for remediation of dyes from wastewater