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The redox chemistry of neptunium in gamma-irradiated aqueous nitric acid in the presence of an organic phase
- 1.0487224 - FZÚ 2018 RIV HU eng J - Journal Article
Mincher, B.J. - Přeček, Martin - Paulenova, A.
The redox chemistry of neptunium in gamma-irradiated aqueous nitric acid in the presence of an organic phase.
Journal of Radioanalytical and Nuclear Chemistry. Roč. 308, č. 3 (2016), s. 1005-1009. ISSN 0236-5731. E-ISSN 1588-2780
R&D Projects: GA MŠMT EE2.3.30.0057
Grant - others:OP VK 4 POSTDOK(XE) CZ.1.07/2.3.00/30.0057
Institutional support: RVO:68378271
Keywords : neptunium * redox chemistry * radiation chemistry * solvent extraction
OECD category: Inorganic and nuclear chemistry
Impact factor: 1.282, year: 2016
The radiolytic changes in oxidation state for solutions of initially Np(V) and/or Np(VI) were investigated by gamma-irradiation in conjunction with UV/Vis spectroscopy of the aqueous phase. Samples were irradiated in varying concentrations of nitric acid, and with or without the presence of 30 % TBP in dodecane. At short irradiation times Np(V) was oxidized to Np(VI), even in the presence of the organic phase. Upon the radiolytic production of sufficient amounts of nitrous acid, reduction of Np(VI) to Np(V) occurred in both phases. This was accompanied by stripping of the previously extracted Np(VI). Nitric acid concentrations of 6 M mitigated this reduction.
Permanent Link: http://hdl.handle.net/11104/0281901
Number of the records: 1