Solvent extraction and fluorescence spectroscopic investigation of the selective Am(III) complexation with TS-BTPhen
An americium(III) selective separation procedure was developed based on the coextraction of trivalent actinides (An(III)) and lanthanides (Ln(III)) by TODGA (N,N,N′,N′-tetraoctyl-diglycolamide), followed by Am(III) selective stripping using the hydrophilic complexing agent TS-BTPhen (3,3′,3ʺ,3ʺ′-[3-...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
16 Mar 2016
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| In: |
Solvent extraction and ion exchange
Year: 2016, Jahrgang: 34, Heft: 2, Pages: 126-140 |
| ISSN: | 1532-2262 |
| DOI: | 10.1080/07366299.2016.1151308 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1080/07366299.2016.1151308
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| Verfasserangaben: | Peter Kaufholz, Giuseppe Modolo, Andreas Wilden, Fabian Sadowski, Dirk Bosbach, Christoph Wagner, Andreas Geist, Petra J. Panak, Frank W. Lewis, Laurence M. Harwood |
MARC
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| 245 | 1 | 0 | |a Solvent extraction and fluorescence spectroscopic investigation of the selective Am(III) complexation with TS-BTPhen |c Peter Kaufholz, Giuseppe Modolo, Andreas Wilden, Fabian Sadowski, Dirk Bosbach, Christoph Wagner, Andreas Geist, Petra J. Panak, Frank W. Lewis, Laurence M. Harwood |
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| 520 | |a An americium(III) selective separation procedure was developed based on the coextraction of trivalent actinides (An(III)) and lanthanides (Ln(III)) by TODGA (N,N,N′,N′-tetraoctyl-diglycolamide), followed by Am(III) selective stripping using the hydrophilic complexing agent TS-BTPhen (3,3′,3ʺ,3ʺ′-[3-(1,10-phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayl]tetrabenzenesulfonic acid). Distribution ratios were found at an acidity of 0.65 mol L−1 nitric acid that allowed for the separation of Am(III) from Cm(III) (DCm > 1; DAm < 1), giving a separation factor between curium and americium of SFCm/Am = 3.6 within the stripping step. Furthermore, Am(III) was readily separated from the lanthanides with the lowest selectivity for the Ln(III)/Am(III) separation being lanthanum with a separation factor of SFLa/Am = 20. The influence of the TS-BTPhen concentration on Am(III) distribution ratios was studied, giving a slope (logD vs. log[TS-BTPhen]) of approximately −1 for the stripping of An(III) with TS-BTPhen from the TODGA-based organic phase. Time-resolved laser fluorescence spectroscopy (TRLFS) measurements of curium(III) were used to analyze the speciation of Cm(III)-TS-BTPhen complexes. Both 1:1 and 1:2 complexes were identified in single-phase experiments. The formation of the 1:1 complex was suppressed in 0.5 mol L−1 nitric acid but it was significantly present in HClO4 at pH 3. Conditional stability constants of the complex species were calculated from the TRLFS experiments. | ||
| 650 | 4 | |a Am(III) separation | |
| 650 | 4 | |a americium | |
| 650 | 4 | |a americium-curium separation | |
| 650 | 4 | |a curium | |
| 650 | 4 | |a lanthanides | |
| 650 | 4 | |a partitioning | |
| 650 | 4 | |a selective stripping | |
| 650 | 4 | |a TODGA | |
| 650 | 4 | |a TS-BTPhen | |
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| 700 | 1 | |a Sadowski, Fabian |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bosbach, Dirk |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Geist, Andreas |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Lewis, Frank W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Harwood, Laurence M. |e VerfasserIn |4 aut | |
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