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An Alternative Procedure for Selective Leaching of Uranium from Carbonate-Rich Black Shale, Um-Bogma Formation, El-Allouga, Southwestern Sinai

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Radiochemistry Aims and scope

An Erratum to this article was published on 01 March 2021

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Abstract

An alternative procedure was developed for selective leaching of uranium from carbonate-rich black shale of southwestern Sinai (0.16% U3O8). Uranium was present in the rock sample in the hexavalent state. This method is based on using a mixed citric acid/calcium citrate reagent so as to leave the carbonate, vanadium, and copper almost intact for the later processing. The influence of the concentration of citric acid/Ca citrate, molar ratio, grain size, pH of the leach liquor solutions, solid-to-liquid ratio, leaching time, and temperature was investigated in order to find optimum conditions. From the leach liquor, uranium can be recovered by addition of isopropyl alcohol.

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  1. Nuclear Materials Authority, P.O. Box 530, El Maadi, 11742, Cairo, Egypt

    A. R. Bakry

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Bakry, A.R. An Alternative Procedure for Selective Leaching of Uranium from Carbonate-Rich Black Shale, Um-Bogma Formation, El-Allouga, Southwestern Sinai. Radiochemistry 63, 87–95 (2021). https://doi.org/10.1134/S1066362221010136

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  • DOI: https://doi.org/10.1134/S1066362221010136

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