الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The present thesis is mainly focused on the recovery of uranium from standard solution and sulfate leach liquor of shale bearing chloride sample collected from Abu Zeneima, south west Sinai, Egypt using macro reticular resin, Ambersep 920U Cl. There is a problem during the extraction of uranium from the studied leach liquor due to the presence of chloride ions in the solution using the normal anion exchange resins such as D 236b anion resin whereas the chloride ions are competed with anionic complex of uranium as well as the normal anion resins are fouled with chloride ions which represented a problem in the kinetics of both loading and elution. Hence, a suggested method is applied for the recovery of uranium using Ambersep 920U Cl resin which is used for the recovery of uranium in the presence of highly chloride ions.
Batch and dynamic experiments have been carried out to obtain the optimum conditions for uranium extraction by Ambersep 920U Cl from the synthetic standard solutions of uranium ions. Distribution coefficient (Log Kd) and uptake capacity (qe, mg/g) of uranium ions have been studied as a function of the following parameters: solution pH, contact time, initial uranium concentration, resin dosage, temperature, flow rate, breakthrough volumes, chloride concentration and diverse ions. Also, kinetic studies, thermodynamic studies, isotherm models, and elution studies have been investigated.
The optimum leaching parameters of uranium are obtained from shale sample. The obtained results show that 0.8 M sulfuric acid gives leaching efficiency of 90 %, 5 h shaking time is sufficient to give 90%, but the temperature can be raised to 90 º C with reduced time to 1 h to give leaching efficiency of 81.4 %. It is also found that the reduction of grain size to -200 mesh leads to uranium liberation from the solid phase for giving the best leaching efficiency of 90% as well as the best solid to liquid phase ratio (1:10) is giving leaching efficiency of 90%.
The studied optimum extraction factors are applied for uranium extraction from the pregnant solution of shale bearing chloride sample collected from south west Sinai, Egypt. The uranium ions are precipitated using sodium hydroxide at pH 7.5 to produce sodium diuranate (yellow cake) , therefore the production of uranium concentrate (yellow cake) is completely analyzed to obtain a specification of the yellow cake product by the studied technique.
Finally, the statistical evaluation studies were applied for uranium analysis by the spectrophotometric and oxidometric titration techniques and comparing the results with the values of standard reference samples to calculate the accuracy and precision of these methods. The final results indicate that Ambersep 920U Cl is a selective and suitable resin which can be used for uranium extraction from high chloride matrices.