Journal of Radioanalytical Chemistry

, Volume 63, Issue 2, pp 295–300 | Cite as

Temperature effects on the extraxtion of divalent cobalt, zinc, cadmium and mercury by salicylaldoxime in carbon tetrachloride

  • H. F. Aly
  • S. M. Khalifa
  • R. M. Mahfooz
  • M. K. Sherif


The effect of temperature on the extraction of Co2+, Zn2+, Cd1+ and Hg2+ by salicylaldoxime diluted with carbon tetrachloride was investigated radiometrically. It is found that the extraction constants at 25°C increase linearly with l/r, where r is the effective coordination radius of the metal cation. The thermodynamic data calculated from the effect of temperature on the extraction showed that, 1) the extraction process is endothermic, 2) the dehydration of the metal cation in the extraction process is the predominating factor in determining the enthalpy variation and 3) the entropy variation is a contribution of the degree of order caused by the hydration of the proton and the highly ordered chelate structure of the extracted species.


Metal Cation Carbon Tetrachloride Distribution Ratio Kuwait Extraction Constant 
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  1. 1.
    A. W. ASHBROOK, Coord. Chem. Rev., 16 (1975) 285.CrossRefGoogle Scholar
  2. 2.
    J. F. FLAGG, N. H. FURMAN, Ind. Eng. Chem. Anal. Ed., 12 (1940) 529.CrossRefGoogle Scholar
  3. 3.
    K. BURGER, I. EGYED, J. Inorg. Nucl. Chem., 27 (1965) 2361.CrossRefGoogle Scholar
  4. 4.
    I. DAHL, Anal. Chim. Acta, 41 (1968) 9.CrossRefGoogle Scholar
  5. 5.
    J. R. PARRISH, J. S. AFR. Chem. Inst., 23 (1970) 129.Google Scholar
  6. 6.
    L. PAULING, The Nature of Chemical Bond., 3rd ed. Cornell University Press, New York, 1960.Google Scholar
  7. 7.
    R. D. SHANNON, Acta Crystallogr., A32 (1976) 751.CrossRefGoogle Scholar
  8. 8.
    W. E. DASENT, Inorganic Energetics, Penguin Books, England, 1970, p. 141.Google Scholar
  9. 9.
    C. B. MONK, Electrolytic Dissociation, Academic Press, New York, 1961.Google Scholar

Copyright information

© Akadémiai Kiadó 1981

Authors and Affiliations

  • H. F. Aly
    • 3
  • S. M. Khalifa
    • 1
  • R. M. Mahfooz
    • 2
  • M. K. Sherif
    • 2
  1. 1.Atomic Energy EstablishmentCairo(Egypt)
  2. 2.Chemistry DepartmentAswan UniversityAswan(Egypt)
  3. 3.Chemistry Dept.Kuwait UniversityKuwait

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