Thermodynamically Derived Relationships between the Modified Langmuir Isotherm and Experimental Parameters Article

cited authors

  • Polzer, WL; Gopala Rao, M; Fuentes, HR; Beckman, RJ

fiu authors


  • The modified Langmuir isotherm parameters and the thermodynamic ion-exchange properties are developed from theoretical considerations leading to the derivation of a relationship between the two. For the binary ionexchange system, the relationship indicates that a unique set of isotherm parameters can be defined by a minimum set of experimental parameters. Those parameters are the solid-liquid ratio and the initial concentration of the competing solute in the liquid and exchanger phases. In principle, unique sets of isotherm parameters can be predicted for different conditions from a known set of experimentally determined parameters. The effect of experimental parameters (e.g., solid-liquid ratio and competing solute concentration) on isotherm parameters (e.g., linear Kd) have been documented in the literature. Experimental data are used to illustrate the derived relationships. © 1992, American Chemical Society. All rights reserved.

publication date

  • September 1, 1992

Digital Object Identifier (DOI)

start page

  • 1780

end page

  • 1786


  • 26


  • 9