We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Separation of Radioactive Elements from Ethiopian Kenticha Pegmatite Ore by Hydrometallurgical Methods.
- Authors
Cheru, Mulugeta Sisay; del Rosario, Alberto Velázquez; Ali, Abubeker Yimam; Berhe, Goitom Gebreyohanes; Tadesse, Bogale
- Abstract
The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to 150°C, at which 96% removal of uranium was achieved. Particles in the size range of − 100 + 75 μm resulted in the highest leaching of uranium, while formation of a colloidal suspension was observed when using a fine particle size fraction (− 75 μm). The dissolution of uranium increased with increasing leaching time. No significant systematic dependence of the leachability of thorium on the above variables was observed. Optimum extraction of uranium and thorium using D2EHPA was obtained when using aqueous/organic phase volume ratio of 1:1, solvent concentration of 0.3 M, and contact time of 20 min.
- Subjects
PEGMATITES; HYDROMETALLURGY; URANIUM; THORIUM; LEACHING; EXTRACTION (Chemistry)
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 12, p2807
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-018-3187-3