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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

IMPACT FACTOR 2018: 1.339

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.333
Source Normalized Impact per Paper (SNIP) 2018: 0.720

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Volume 104, Issue 12


Comparision in the solvent extraction behavior of uranium (VI) in some trialkyl phosphates in ionic liquid

R. Rama / Alok Rout / K. A. Venkatesan
  • Corresponding author
  • Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India, Tel.: +91 44 27480065, Fax: +91 44 27480065
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/ M. P. Antony / A. Suresh
Published Online: 2016-08-10 | DOI: https://doi.org/10.1515/ract-2015-2523


Higher homologs of trialkyl phosphates (TAlP) are proposed for reprocessing of fast reactor fuels. Solvent extraction behavior of U(VI) from nitric acid medium was studied in some TAlP present in 1-octyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C8mim][NTf2]) ionic liquid. The extractants investigated were tri-n-propylphosphate (TPP), tri-n-butylphosphate (TBP), tri-n-amylphosphate (TAP), tri-n-octylphosphate (TOP), tri-iso-amylphosphate (TIAP) and tri-iso-butylphosphate (TIBP). The extraction of uranium (VI) was investigated as a function of various parameters, such as the equilibration time, [HNO3], [TAlP], temperature and nature of ionic liquid cation. The distribution ratios of U(VI) increased with an increase in the concentration of nitric acid and decreases in the order TOP>TAP~ TIAP>TBP~TIBP>TPP. The stoichiometry of the extraction was determined by slope analysis of the extraction data. Distribution ratios of U (VI) were determined at various temperatures and the thermodynamic parameters were derived. Quantitative stripping of uranium from the loaded ionic liquid phase was achieved using dilute nitric acid.

Keywords: Uranium; ionic liquid; solvent extraction; trialkyl phosphate; stripping


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About the article

Received: 2015-10-05

Accepted: 2016-06-25

Published Online: 2016-08-10

Published in Print: 2016-12-01

Citation Information: Radiochimica Acta, Volume 104, Issue 12, Pages 865–872, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1515/ract-2015-2523.

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