This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1515/nuka-2015-0120 in citations.
TS-BTPhen as a Promising Hydrophilic Complexing Agent for Selective Am(III) Separation by Solvent Extraction
TS-BTPhen as a Promising Hydrophilic Complexing Agent for Selective Am(III) Separation by Solvent Extraction
The novel hydrophilic back-extraction agent TS-BTPhen (3,3’,3’’,3’’’-[3-(1,10-phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayl]tetrabenzenesulfonic acid) was tested for its selectivity towards Am(III) over Cm(III) and Eu(III) with a TODGA (N,N,N’,N’-tetraoctyldiglycolamide) based solvent. Bat...
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Personal Name(s): | Kaufholz, Peter |
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Sadowski, Fabian / Wilden, Andreas / Modolo, Giuseppe (Corresponding author) / Lewis, Frank W. / Smith, Andrew W. / Harwood, Laurence M. | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | Nukleonika, 60 (2015) 4 (Pt. II), S. 815-820 |
Imprint: |
Warsaw
Inst. of Nuclear Chemistry and Technology
2015
|
DOI: |
10.1515/nuka-2015-0120 |
Conference: | First SACSESS International Workshop, Warsaw (Poland), 2015-04-22 - 2015-04-24 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Safety of ACtinide Separation proceSSes Nuclear Waste Management |
Publikationsportal JuSER |
The novel hydrophilic back-extraction agent TS-BTPhen (3,3’,3’’,3’’’-[3-(1,10-phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayl]tetrabenzenesulfonic acid) was tested for its selectivity towards Am(III) over Cm(III) and Eu(III) with a TODGA (N,N,N’,N’-tetraoctyldiglycolamide) based solvent. Batch experiments were carried out using TS-BTPhen dissolved in aqueous nitric acid solution with tracers of 152Eu, 241Am and 244Cm. A significant increase of the separation factor for Cm over Am from SFCm/Am 1.6 to SFCm/Am 3.3 was observed compared to the use of a TODGA-nitric acid system alone. Furthermore, stripping was possible at high nitric acid concentrations (0.6 - 0.7 mol/L) resulting in a low sensitivity to acidity changes. The influence of the TS-BTPhen concentration was analysed. A slope of -2 was expected taking into account literature stoichiometries of the lipophilic analogue CyMe4BTPhen. However, a slope of -1 was found. Batch stripping kinetics showed fast kinetics for the trivalent actinides. As an alternative organic ligand the methylated TODGA derivate Me-TODGA (2-methyl-N,N,N’,N’-tetraoctyldiglycolamide) was tested in combination with the hydrophilic TS-BTPhen. The Am(III) separation was achieved at even higher nitric acid concentrations compared to TODGA. |