Pedosphere 9(4): 319--322, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Calculation of thermodynamic parameters for Freundlich and Temkin isotherm models |
| ZHANG Zeng-Qiang1, MENG Zhao-Fu1 and ZHANG Yi-Ping2 |
1 Department of Basic Science, Northwestern Agricultural University, Yangling 712100 (China);
2 Depertment of Resources and Environment Science, Northwestern Agricultural University, Yangling 712100 (China) |
| ABSTRACT |
| Derivation of the Freundlich and Temkin isotherm models from the kinetic adsorption/desorption equations was carried out to calculate their thermodynamic equilibrium constants. The calculation formulae of three thermodynamic parameters, the standard molar Gibbs free energy change, the standard molar enthalpy change and the standard molar entropy change, of isothermal adsorption processes for Freundlich and Temkin isotherm models were deduced according to the relationship between the thermodynamic equilibrium constants and the temperature. |
| Key Words: Freundlich isothermal model, Temdin isothermal model, thermodynamic parameters |
| Citation: Zhang, Z. Q., Meng, Z. F. and Zhang, Y. P. 1999. Calculation of thermodynamic parameters for Freundlich and Temkin isotherm models. Pedosphere. 9(4): 319-322. |
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