The kinetics of UO//2 dissolution in ammoniacal carbonate solutions were studied as a function of total carbonate concentration, oxygen pressure, temperature and pH value. The intrinsic leaching (no external potential) of UO//2 agreed well with an electrochemical surface-reaction model, in which anodic oxidation of UO//2 is coupled with cathodic reduction of oxygen. The experimenCtal data corroborate an anodic dissolution sequence that includes both charge-transfer and chemical-reaction steps. Experimental evidence indicates that the mechanism involves consecutive one-electron-transfer steps.
|Original language||English (US)|
|Journal||Transactions of the Institution of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy|
|Publication status||Published - Sep 1979|
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys