Accessible Requires Authentication Published by Oldenbourg Wissenschaftsverlag April 16, 2010

Extraction of Am(III) and Eu(III) from nitrate media with Cyanex®-301 and neutral “N” donor ligands: A thermodynamic study

A. Bhattacharyya, P. K. Mohapatra and V. K. Manchanda
From the journal rca - Radiochimica Acta

Abstract

Studies on the effect of temperature on the liquid–liquid extraction behaviour of a trivalent actinide ion, Am3+ and a trivalent lanthanide ion, Eu3+ using a “S”-donor soft ligand, bis (2,4,4-trimethylpentyl) dithiophosphinic acid (Cyanex®-301) were carried out. The temperature effect on the enhancement in extraction as well as the selectivity which occurred in the presence of neutral soft donor auxiliary ligands with “N” donor atoms viz. , bipyridyl ( bipy ) and 1,10-phenanthroline ( phen ) was also investigated. Thermodynamic parameters like the changes in the extraction enthalpy (ΔH°), entropy (ΔS°) and free energies (ΔG°) for both the binary as well as ternary extraction systems were obtained. These thermodynamic parameters could explain the nature of the species extracted with both Am(III) and Eu(III).


* Correspondence address: B.A.R.C - Bhabha Atomic Research Centre, Radiochemistry Division, 400 085 Mumbai, Indien,

Published Online: 2010-04-16
Published in Print: 2010-03

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