Uranium recovery from concentrated chloride solution produced from direct acid leaching of calcareous shale, Allouga ore materials, southwestern Sinai, Egypt

摘要

Sulfuric acid leaching of calcareous shale in Allouga locality has been successfully performed with efficiency 86.84%. The produced solution has 144.3 mg U L - 1 and 48.4 g Cl L - 1. Systematic work on this type of ores is necessary to remove chloride firstly by washing with freshwater before leaching process to be suitable for U recovery on quaternary amine resins. Washing consumes a lot of water, producing unusable uranium waste solutions, loses 20- 25% from leaching time. Commercial quaternary amine resin and synthesized amidoxime sorbents used for uranium recovery from produced leach liquor have capacities zero and 196.4 mg U g - 1 respectively.