Speciation of technetium peroxo complexes in sulfuric acid revisited
- Univ. of Nevada, Las Vegas, NV (United States)
- Russian Academy of Sciences (RAS), Moscow (Russian Federation)
- Hunter College, New York, NY (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Medical Inst. REAVIZ, Moscow (Russian Federation)
- Russian Academy of Sciences (RAS), Moscow (Russian Federation); Medical Inst. REAVIZ, Moscow (Russian Federation)
- Argonne National Lab. (ANL), Argonne, IL (United States)
We found that the reaction of Tc(+7) with H2O2 has been studied in H2SO4 and the speciation of technetium performed by UV–visible and 99-Tc NMR spectroscopy. UV–visible measurements show that for H2SO4 ≥ 9 M and H2O2 = 0.17 M, TcO3(OH)(H2O)2 reacts immediately and blue solutions are obtained, while no reaction occurs for H2SO4< 9 M. The spectra of the blue solutions exhibit bands centered around 520 and 650 nm which are attributed to Tc(+7) peroxo species. Furthermore, our studies in 6 M H2SO44 - begins to react for H2O2 = 2.12 M and red solutions are obtained. The UV–visible spectra of the red species are identical to the one obtained from the reaction of TcO4 - with H2O2 in HNO3 and consistent with the presence of TcO(O2)2(H2O)(OH). The 99-Tc NMR spectrum of the red solution exhibits a broad signal centered at +5.5 ppm vs TcO4 - and is consistent with the presence of a low symmetry Tc(+7) molecule.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1113042
- Report Number(s):
- SAND-2013-8259J; PII: 3434
- Journal Information:
- Journal of Radioanalytical and Nuclear Chemistry, Vol. 303, Issue 2; ISSN 0236-5731
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Speciation and reactivity of heptavalent technetium in strong acids
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journal | January 2018 |
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