Application of kinetic models for the description of fat-soluble physiologically active substances adsorption onto highly ordered inorganic siliceous materials

Abstract

The kinetic of adsorption of fat-soluble physiologically active substances (PAS) such as a-
tocopherol, b-sitosterol and phosphatidylcholine from hexane solution onto MCM-41 type mesoporous
material has been studied. It was demonstrated that the possibility for both diffusion and adsorption
limitation of the kinetic rate of sorption should be taken into account for the considered systems. Adequacy
of Boyd’s diffusion model, Lagergren’s model, Ho and McKay and also Elovich models using to describe the
kinetic of adsorption of fat-soluble PAS onto mesoporous material MCM-41 type from hexane solution was
shown. The process of adsorption of proceeds in mixed diffusion mode.