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Adsorption Of Uranium from Phosphoric acid and Waste Water with Microcapsules Contains Selective Extractants

Tayebi, Ahmad | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39311 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Ghofrani, Mohammad Bagher; Khanchi, Alireza; Outokesh, Mohammad
  7. Abstract:
  8. Uptake characteristics of alginate microcapsules containing D2EHPA/TOPO for adsorption of uranium from industrial effluent were examined using batch, stirred and column method .stable alginate microcapsules in dried form was developed by immobilizing of D2EHPA/TOPO in porous matrix of calcium alginate. Characteristics of microcapsules were carrying out by destructive chemical analysis, BET, SEM and TG .the synthesized microcapsules showed a good column properties and high selectivity and reusability. In addition, isotherm adsorption of calcium alginate and microcapsules were fitted with frendlich's equation .the microcapsules also demonstrated that, the uptake percentage was constantly high in wide range of PH values. A novel microspherical adsorbent for removal of uranium from industrial effluent was developed by immobilizing of natural bentonite in the polymeric matrix of calcium alginate. Biopolymers are selective, nontoxic, and cost efficient, and thus highly competitive with ion exchange resins. Among biopolymers, alginate is endowed with by its remarkable ion exchange properties, acid stability, and ease of sol-gel transformation Different uptake properties of the prepared microspheres were examined using batch, stirred and column methods. The adsorbent showed high selectivity toward uranium ions, especially at pHs above 3
  9. Keywords:
  10. Oranium ; Phosphoric Acid ; Alginate ; Microcapsules ; Bentonite

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