Abstract
The ion-exchange isotherms of Ni2+/H+ and Co2+/H+ have been determined with a solution of 0.1 ionic strength for both forward and backward reactions at 25°C by a batch technique. The thermodynamic equilibrium constants for \( \overline {2R - - - - - - H} + M^{2 + } \leftrightarrows \overline {R - - - - - - M} + 2H^ + \) the exchange process have been calculated using the Gains and Thomas equation. The preference Ni2+>Co2+ has been shown. The ion exchange selectivity for exchange of Ni2+ and Co2+ ions with hydrogen ions on zirconium titanate has been investigated as a function of [HCl] from aqueous and 25% of methanol and/or ethanol solutions. The values of the thermodynamic functions for the studied systems have been reported.
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Zakaria, E.S., Ali, I.M. & El-Naggar, I.M. Selectivity and thermodynamic characteristics of doubly charged cations on zirconium titanate from aqueous and alcoholic solutions. Journal of Radioanalytical and Nuclear Chemistry 261, 689–696 (2004). https://doi.org/10.1023/B:JRNC.0000037114.87023.33
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DOI: https://doi.org/10.1023/B:JRNC.0000037114.87023.33