Journal of Materials Science

, Volume 28, Issue 19, pp 5143–5147 | Cite as

Alginate polyelectrolyte ionotropic gels

Part XV Physicochemical properties of uranyl alginate complex especially the chemical equilibrium and electrical conductivity related to the coordination geometry
  • R. M. Hassan
  • Y. Ikeda
  • H. Tomiyasu


The heterogeneous equilibrium for exchange of UO 2 2+ counter-ions in uranyl alginate exchange resin by H+ ions has been investigated using titrimetric and spectrophotometric techniques. The thermodynamic equilibrium constant was found to be 15.51±0.33 at 25 °C. The electrical conductivity of uranyl alginate in the form of circular discs has been examined as a function of temperature. The Arrhenius plot of log δ versus 1/T showed a complicated behaviour where three regions of conduction were separated by two distinct transition zones. This behaviour was interpreted by the transfer of electrons from alginate to the cross-linked uranyl ion with formation of free radicals and uranium ions of lower oxidation states in a sequence, followed by dimerization of these radicals in the final stages. The X-ray diffraction pattern indicated that the uranyl alginate complex is amorphous in nature. Infrared absorption spectra indicated the presence of UO 2 2+ chelated to the alginate macromolecular chains, and displayed γa CO 2 and γs CO 2 in the ranges of 1591 and 1410 cm−1 respectively. Two geometrical structures for chelation of UO 2 2+ with the functional groups of alginate macromolecules have been suggested.


Uranium Alginate Uranyl Exchange Resin Arrhenius Plot 
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  1. 1.
    A. Haigh andO. Smidsrød,Acta Chem. Scand. 19 (1965) 341.CrossRefGoogle Scholar
  2. 2.
    H. Thiele andK. Hallich,Kolland. Z. 151 (1957) 1.CrossRefGoogle Scholar
  3. 3.
    R. G. Schweiger,ibid. 196 (1964) 47.Google Scholar
  4. 4.
    T. Takahashi andE. Emura,Kōgyo Kagaku Zasshi Jpn 63 (1960) 1025.CrossRefGoogle Scholar
  5. 5.
    S. Olav,Acta Chem. Scand. 19 (1965) 329.CrossRefGoogle Scholar
  6. 6.
    R. M. Hassan, M. Th. Makhlouf, A. M. Summan andA. Wad,Eur. Polym. J. 25 (1989) 993.CrossRefGoogle Scholar
  7. 7.
    R. M. Hassan,High Perf. Polym. 1 (1989) 275.CrossRefGoogle Scholar
  8. 8.
    Idem, Coll. Surf. 60 (1991) 303.CrossRefGoogle Scholar
  9. 9.
    Idem, Poly. Sci., submitted.Google Scholar
  10. 10.
    A. I. Vogel, “Textbook of Quantitative Inorganic Chemistry”, 4th Edn (Longman, New York, 1978).Google Scholar
  11. 11.
    A. Awad, El-Cheikh andR. M. Hassan,Rev. Roum. Chim. 24 (1979) 563.Google Scholar
  12. 12.
    R. M. Hassan,Mater. Sci. 26 (1991) 5806.CrossRefGoogle Scholar
  13. 13.
    R. G. Schweiger,J. Organ. Chem. 27 (1962) 1789.CrossRefGoogle Scholar
  14. 14.
    R. M. Hassan, A. Awad andA. Hassan,J. Polym. Sci. 29 (1991) 1645.CrossRefGoogle Scholar
  15. 15.
    S. Glasstone andD. Lewis, “Elements of Physical Chemistry”, 2nd Edn (Van Nostrand, 1960).Google Scholar
  16. 16.
    P. J. Haugh, J. B. Lawton andC. O. Phillips,J. Phys. Chem. 76 (1972) 658.Google Scholar
  17. 17.
    I. I. Chernyaev, “Complexes Compounds of Uranium” (Scientific Translation, Jerusalem, 1966).Google Scholar
  18. 18.
    D. Cozzi, P. G. Desideri, L. Leprl andG. Ciantalli,J. Chromatogr. 35 (1968) 369.Google Scholar
  19. 19.
    F. A. Cotton andG. Wilkinson, “Advanced Inorganic Chemistry”, 3rd Edn (Wiley, New York, 1972).Google Scholar
  20. 20.
    R. M. Hassan,Poly. Inter. 31 (1993) 81.CrossRefGoogle Scholar
  21. 21.
    A. Ekstrom,Inorg. Chem. 13 (1974) 2237.CrossRefGoogle Scholar
  22. 22.
    G. Millazo, S. Caroll andV. K. Sharma, “Tables of Standard Potentials” (Wiley, Prentice-Hall, New York, 1975).Google Scholar
  23. 23.
    J. J. Katz andE. Rabinowitch, “The Chemistry of Uranium” (USAEC, 1951).Google Scholar
  24. 24.
    N. A. Karimi, D. Cupta andP. Parasad,Ind. J. Pure Appl. Phys. 125 (1987) 83.Google Scholar

Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • R. M. Hassan
    • 1
  • Y. Ikeda
    • 2
  • H. Tomiyasu
    • 3
  1. 1.Chemistry Department, Faculty of ScienceAssiut UniversityAssiutEgypt
  2. 2.Nuclear Chemistry and Chemical Engineering CentreInstitute of Research and InnovationChibaJapan
  3. 3.Research Laboratory for Nuclear ReactorsTokyo Institute of TechnologyTokyoJapan

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