Abstract
A molecular statistical method has been used to describe both specific and non-specific sorption of hydrocarbons on the surface of a non-swelling layer silicate (kaolinite) modified with octadecylammonium chloride. Sorption of n-hexane on this surface appears to be determined primarily by dispersion attraction to the modified overlayer, while specific interaction has been shown to play a major role in the case of benzene sorption. The energy characteristics of the benzene—RNH3+ adsorption complex have been estimated and the assumption that the benzene molecule is partially delocalized on the modified kaolinite surface shown to be reasonable.
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