An Additional Insight into the Correlation between the Distribution Ratios and the Aqueous Acidity of the TODGA System

Extraction of Eu(III) and Am(III) from HNO 3 into the organic solvents using N,N,N′,N′-tetraoctyl-diglycolamide (TODGA) was investigated in order to study the detailed extraction reaction. The chemical species: 1:2 for metal:TODGA complex is present in polar diluents. On the other hand, the metal co...

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Bibliographic Details
Published in:Solvent extraction and ion exchange 2007-03, Vol.25 (2), p.187-204
Main Authors: Sasaki, Yuji, Rapold, Philippe, Arisaka, Makoto, Hirata, Masaru, Kimura, Takaumi, Hill, Clément, Cote, Gérard
Format: Article
Language:English
Subjects:
Am(III)
Eu(III)
extraction
Nuclear Experiment
Nuclear Theory
Physics
separation
solvent
TODGA
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Summary:Extraction of Eu(III) and Am(III) from HNO 3 into the organic solvents using N,N,N′,N′-tetraoctyl-diglycolamide (TODGA) was investigated in order to study the detailed extraction reaction. The chemical species: 1:2 for metal:TODGA complex is present in polar diluents. On the other hand, the metal complexes need three or more TODGA molecules to remain stable in non-polar diluents. The HNO 3 concentration dependence on the distribution ratio suggests that HNO 3 participates in the metal extraction. Infrared spectra indicate that the carbonyl oxygen coordinates with Eu(III), and luminescence lifetimes suggest that there are no water molecules in the inner coordination sphere of the extracted Eu-complex.
ISSN:0736-6299
1532-2262
DOI:10.1080/07366290601169345