Colloid and Polymer Science

, Volume 253, Issue 2, pp 139–143 | Cite as

Thermodynamics of ion exchange equilibria involving Al-ions in Na- and Ca-illites

  • J. P. Singhal
  • R. P. Singh
  • D. Kumar
Original Contributions Colloid Science


A thermodynamic study has been made of the ion exchange of Na- and Ca-illite with Al ions. From the exchange isotherms at 25 and 50°C the changes in free energy, enthalpy and entropy for the reactions were calculated. The isotherms, separation factors and free energy changes indicated a preference of Na and Ca ions by the illite.


Polymer Entropy Physical Chemistry Enthalpy Free Energy 
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Copyright information

© Dr. Drietrich Steinkopff Verlag 1975

Authors and Affiliations

  • J. P. Singhal
    • 1
  • R. P. Singh
    • 1
  • D. Kumar
    • 1
  1. 1.Chemical Laboratories Faculty of EngineeringTechnology Muslim UniversityAligarhIndia

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