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Uranium Recovery From Liquid Waste of UCF Plant With Ion Exchange Resin Method

Asadi, Zahra | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41360 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Samadfam, Mohammad; Sepehrian, Hamid
  7. Abstract:
  8. During the various stages of uranium processing in Uranium Conversion Facility (UCF) in Isfahan, significant amounts of liquid waste stream is produced which is sent to evaporation ponds. In addition to environmental considerations, uranium recovery from existing pools is also economically feasible due to high concentration uranium in liquid waste. Several methods have been evolved over the years to remove dissolved uranium from uranium bearing solution. These methods are: chemical precipitation, liquid-liquid extraction, ion exchange and membrane processes. The purpose of this study is recovery of uranium from liquid waste of Isfahan UCF plant by using ion exchange method. Although this method is relatively expensive if compared with other conventional methods, it is very efficient in decreasing uranium concentration in the effluent to sub-ppm level. In this study uranium uptake by different ion exchange resins such as IRA-910, Dowex 2x8, CG-400 and nanoporous MCM-41was studied and the effect of some parameters such as pH, contact time (between adsorbent and solution), initial concentration of uranium in solution and the presence of some anions (Sulfate, Phosphate, Chloride. Nitrate and Fluride) were investigated. According to the results obtained, it seems that nanoporous MCM-41is very promising adsorbing material for uranium uptake from liquid waste of UCF plant
  9. Keywords:
  10. Uranium Recovery ; Ion Exchange ; Nanoporous Materials ; Radioactive Waste

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