SYNERGISTIC EXTRACTION STUDIES OF Am(III) AND Eu(III) FROM PERCHLORIC ACID WITH 4-BENZOYL-2,4-DIHYDRO-5-METHYL-2-PHENYL-3H- PYRAZOL-3-THIONE (BMPPT) AND TRI-n-OCTYLPHOSPHINE OXIDE (TOPO) IN BENZENE
- 1 October 1987
- journal article
- research article
- Published by Taylor & Francis in Solvent Extraction and Ion Exchange
- Vol. 5 (5) , 895-908
- https://doi.org/10.1080/07366298708918599
Abstract
The extraction of Am(III) and Eu(III) from aqueous HCIO4 by BMPPT and TOPO in benzene was studied. The ligand BMPPT gave no detectable extraction in the ranges studied, but when BMPPT and TOPO were combined, a synergistic extraction was observed with a selectivity for Ara(III) over Eu(III) (KdAm = 7.5, Am/Eu = 68, pH 3.0, 0.01 M [TOPO], 0.30 M [BMPPT]). The slope of the acid dependency for Eu and Am was 1.6 ± 0.1 and 2.7 ± 0.1, respectively, over the pH range of 2 to 3.The slope of the BMPPT dependency was 2.7 ± 0.1 and 2.8 ± 0.1 over a 2- and 20-fold concentration range for Eu and Am, respectively; the slope of the TOPO dependency was 2.0 ± 0.1 and 2.2 ± 0.1 for Am and Eu, respectively, over a 20-fold concentration range.Keywords
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