1. System non-ideality was accounted for by using the notion of activity coefficient.

2. The method is based on the analysis of aGraham plot which reflects the adsorption isotherm deviations from ideality.

3. Corresponding analytical solutions of the diffusion equation were evaluated and the results are presented graphically, allowing to express the mass or heat transfer intensity as a quantitative function of the hydrodynamic resistance to mass or heat transfer as well as of the concentration (or temperature) change non-ideality.