This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/24333 in citations.
Please use the identifier: http://dx.doi.org/10.1080/07366299.2019.1710918 in citations.
Gamma radiolysis of TODGA and CyMe4BTPhen in the ionic liquid tri-n-octylmethylammonium nitrate
Gamma radiolysis of TODGA and CyMe4BTPhen in the ionic liquid tri-n-octylmethylammonium nitrate
Radiolytic stability of the extractants N,N,N’,N’-tetraoctyl diglycolamide (TODGA) and 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) in the ionic liquid tri-n-octylmethylammonium nitrate ([N1888][NO3]) was studied via the combination of a s...
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Personal Name(s): | Zsabka, Peter |
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Van Hecke, Karen / Wilden, Andreas / Modolo, Giuseppe / Hupert, Michelle / Jespers, Vincent / Voorspoels, Stefan / Verwerft, Marc / Binnemans, Koen / Cardinaels, Thomas (Corresponding author) | |
Contributing Institute: |
Analytik; ZEA-3 Nukleare Entsorgung; IEK-6 |
Published in: | Solvent extraction and ion exchange, 38 (2020) 2, S. 212-235 |
Imprint: |
Philadelphia, PA
Taylor & Francis
2020
|
DOI: |
10.1080/07366299.2019.1710918 |
Document Type: |
Journal Article |
Research Program: |
Nuclear Waste Management |
Link: |
Restricted Published on 2020-01-20. Available in OpenAccess from 2021-01-20. Restricted Published on 2020-01-20. Available in OpenAccess from 2021-01-20. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1080/07366299.2019.1710918 in citations.
Radiolytic stability of the extractants N,N,N’,N’-tetraoctyl diglycolamide (TODGA) and 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) in the ionic liquid tri-n-octylmethylammonium nitrate ([N1888][NO3]) was studied via the combination of a steady-state irradiation by cobalt-60 gamma-radiation, followed by solvent extraction and identification of radiolysis products by High Performance Liquid Chromatography coupled to Electro Spray Ionisation (HPLC-ESI-MS). The observed trend for the distribution ratios of trivalent minor actinides and Eu(III) showed a decrease as a function of absorbed dose in the case of the TODGA solvent. The gamma irradiations were conducted in the presence or absence of an acidic aqueous phase. The determined dose constants for TODGA under neutral or acidic conditions were up to four times lower than the values reported in aliphatic diluents under comparable conditions. The degradation patterns were similar to those found by former studies on TODGA diluted in n-dodecane; only de-alkylation and bond ruptures within the diglycolamide core were observed. The presence of an acidic aqueous phase during irradiation resulted in a different relative abundance of certain radiolysis products of both the diluent and TODGA and a higher dose constant compared to the neutral irradiation conditions. A quantification of CyMe4BTPhen in irradiated samples with the [N1888][NO3] diluent was not possible, but the effect on its extraction properties was evaluated. The distribution ratios slightly increased under the effect of absorbed dose, indicating the formation of a radiolysis product(s) that are efficient extractants as well. |