Adsorption from the Liquid Phase on Silica Gels of Various Structural Heterogeneity

Abstract

Competition of liquid components for silica gel surface was tested for binary liquid mixtures: methanol + benzene and 2-propanol + n-heptane. The adsorption isotherms were measured using silica gels for column chromatography Si-40 and Si-100 from Merck. On the basis of specific surface excess isotherms the surface layer capacities were calculated. Taking into account the properties of the bulk solutions, the influence of geometrical structure of silicas on the composition of the surface phase is discussed.

Influence of differences in porous structure within granules of activated carbon on adsorption of aromatics from aqueous solutions

“…However, the influence of changes in pore structure should be also taken into account. These effects were studied for adsorption from binary liquid mixtures on activated carbons [2][3][4] and silica gels [5,6]. Significant influence of pore sizes on the formation of the surface phase was confirmed.…”