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Study on Adsorption of Uranium from Saghand Ore Leach Liquor by Continuous Ion Exchange Systems

Noori Khangah, Behrooz | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53818 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Outokesh, Mohammad; Godocynejhad, Davood; Saberyan, Kamal; Asghari, Reza
  7. Abstract:
  8. The current study was attributed to uranium uptake by Varion-AP resin from Saghand, Iran Uranium Mine, ore leach liquor. A suitable high-efficiency system was designed for continuous ion exchange at the bench scale and the uranium uptake parameters were optimized. In this system, 1 reactors was used with a volume of 3 liters in stage with the same height difference. A leach liquor containing uranium with a concentration of between 200 and 300 mg/l was flowed from the feed storage by gravity between reactor 1 to 10 at a flow rate of 30 lit/h and Varion-AP resin was transferred in counter-current flow from stage 10 to 1 by a pneumatic pump. The output of each reactor had a screener that prevented the resin from returning to the previous stage. After the steady-state condition, the concentration of uranium at the output of the system reaches below 4 mg/l. Evaluation of operational parameters including pH, the number of stages, and the amount of resin. The optimal values of each of these parameters were obtained 1.8, 7 stages, 300 ml respectively. It is concluded that seven-stage counter-current resin-in-solution operation under optimum conditions is sufficient to recover about 97% of the uranium from the leached liquor ore. According to the obtained results, the method presented in this study can be used to uptake uranium from leach liquors with appropriate efficiency.The adsorption process was modeled in both batch and continuous modes. Examination of uranium adsorption kinetics with Varion-AP resin revealed that the control mechanism in this process is intraparticle type
  9. Keywords:
  10. Continuous System ; Ion Exchange ; Oranium ; Mathematical Modeling ; Saghand Mine (Yazd) ; Resin in Solution ; Uranium Adsorption ; Uranium Leaching

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