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    Separation of Radioactive Elements from Ethiopian Kenticha Pegmatite Ore by Hydrometallurgical Methods

    Access Status
    Fulltext not available
    Authors
    Cheru, M.
    del Rosario, A.
    Ali, A.
    Berhe, G.
    Tadesse, Bogale
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Cheru, M. and del Rosario, A. and Ali, A. and Berhe, G. and Tadesse, B. 2018. Separation of Radioactive Elements from Ethiopian Kenticha Pegmatite Ore by Hydrometallurgical Methods. The Journal of The Minerals, Metals & Materials Society (TMS). 70 (12): pp. 2807–2812.
    Source Title
    The Journal of The Minerals, Metals & Materials Society (TMS)
    DOI
    10.1007/s11837-018-3187-3
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/71397
    Collection
    • Curtin Research Publications
    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.

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