Jump to main content
Jump to site search

Issue 5, 2013
Previous Article Next Article

Efficient solvent system containing malonamides in room temperature ionic liquids: actinide extraction, fluorescence and radiolytic degradation studies

Author affiliations

Abstract

Solvent extraction studies of actinide metal ions such as Am(III), U(VI), Np(IV), Np(VI), Pu(IV) were carried out in a nitric acid medium using two diamides (L) viz. (DMDBTDMA (N,N′-dimethyl-N,N′-dibutyl-2-tetradecylmalonamide) and DMDOHEMA (N,N′-dimethyl-N,N′-dioctyl-2-(2′-(hexyloxy)ethyl)-malonamide) dissolved in different room temperature ionic liquids (RTILs). The use of RTILs as the diluent significantly enhanced metal ion extraction as compared to that observed in non polar diluent such as n-dodecane. The effects of parameters such as kinetics, aqueous phase acidity (0.01–3 M HNO3), metal ion oxidation states, diamide concentration on the extraction of metal ions were studied. The stoichiometry of the extracted Am(III) species using these diamides varied with ligand concentration viz. (Am.3L)3+ ([L] = 0.005–0.02 M) and (Am.2–2.5L)3+ ([L] = 0.05–0.1 M). Time resolved laser induced fluorescence spectroscopy (TRLFS) studies showed that the extracted species of Eu(III) in an ionic liquid medium had no coordinated water molecules, in contrast to the presence of 1–2 water molecules in the extracted species in a n-dodecane medium. The radiolytic degradation behavior of the diamides/RTIL system has been studied using IR spectroscopy and gas chromatography-mass spectrometry (GC-MS). The data revealed that a significantly lower ligand concentration is required for actinide extraction in ionic liquids as the extraction media as compared to nonpolar diluents.

Graphical abstract: Efficient solvent system containing malonamides in room temperature ionic liquids: actinide extraction, fluorescence and radiolytic degradation studies

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Jun 2012, accepted on 09 Oct 2012 and first published on 10 Oct 2012


Article type: Paper
DOI: 10.1039/C2DT32186F
Citation: Dalton Trans., 2013,42, 1519-1529
  •   Request permissions

    Efficient solvent system containing malonamides in room temperature ionic liquids: actinide extraction, fluorescence and radiolytic degradation studies

    A. B. Patil, P. Pathak, V. S. Shinde, S. V. Godbole and P. K. Mohapatra, Dalton Trans., 2013, 42, 1519
    DOI: 10.1039/C2DT32186F

Search articles by author

Spotlight

Advertisements