Back to Search
Start Over
Microwave-assisted dissolution of ceramic uranium dioxide in TBP–HNO3 complex
- Source :
- Journal of Radioanalytical and Nuclear Chemistry. 298:1613-1618
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- Microwave-assisted dissolution of ceramic uranium dioxide in tri-n-butyl phosphate (TBP)–HNO3 complex was investigated. The research on dissolution of ceramic uranium dioxide in TBP–HNO3 inclusion complex under microwave heating showed the efficiency of the use of this method. Nitric acid present in the inclusion complex participates both dissolution of UO2, and oxidation of U(IV)–U(VI), the resulting UO2(NO3)2 extracted with tri-n-butyl phosphate. Dissolution rate depends on both temperature of microwave dissolution process, and concentration of nitric acid present in the inclusion complex. The most intensive dissolution process is when the concentration of nitric acid ≥2 mol/L and the temperature of 120 °C. From the experimental data obtained by two kinetic models activation energies were calculated. At the average activation energy of UO2 dissolution in TBP–HNO3 complex equal 70 kJ/mol, and reaction order is close to one, i.e. the reaction takes place in an area close to kinetic.
- Subjects :
- Order of reaction
Chemistry
Health, Toxicology and Mutagenesis
Uranium dioxide
Inorganic chemistry
Public Health, Environmental and Occupational Health
Activation energy
Phosphate
Pollution
Analytical Chemistry
chemistry.chemical_compound
Nuclear Energy and Engineering
Nitric acid
visual_art
visual_art.visual_art_medium
Radiology, Nuclear Medicine and imaging
Ceramic
Dissolution
Spectroscopy
Microwave
Nuclear chemistry
Subjects
Details
- ISSN :
- 15882780 and 02365731
- Volume :
- 298
- Database :
- OpenAIRE
- Journal :
- Journal of Radioanalytical and Nuclear Chemistry
- Accession number :
- edsair.doi...........04af56948144c1ec4d28320805d73001
- Full Text :
- https://doi.org/10.1007/s10967-013-2552-5