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2019•Russian Journal of Physical Chemistry ARequires access

Adsorption of Cetyltrimethylammonium Bromide on Zeolite Surface

A. M. Spiridonov, E. V. Aprosimova, В. И. Заболоцкий, V. I. Fedoseeva, M. D. Sokolova, Aitalina Alekseevna Okhlopkova

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Abstract

Abstract The adsorption of a cetyltrimethylammonium bromide (CTAB) cationic surfactant on a natural zeolite from an aqueous solution is studied for a wide range of concentrations. It is shown that a modified BET equation can be used for bimolecular adsorption. It is found that after the first few hours of adsorption from a premicellar solution, there is a lack of both cetyltrimethylammonium cations and bromide anions, due to their codiffusion to the ion-exchange sites. It is concluded that adsorption from a colloidal solution occurs via the adsorption of micelles, their subsequent degradation, and the formation of a bimolecular adsorption layer.

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What this paper is about

Abstract The adsorption of a cetyltrimethylammonium bromide (CTAB) cationic surfactant on a natural zeolite from an aqueous solution is studied for a wide range of concentrations. It is shown that a modified BET equation can be used for bimolecular adsorption. It is found that after the first few hours of adsorption from a premicellar solution, there is a lack of both cetyltrimethylammonium cations and bromide anions, due to their codiffusion to the ion-exchange sites. It is concluded that adsorption from a colloidal solution occurs via the adsorption of micelles, their subsequent degradation, and the formation of a bimolecular adsorption layer.

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Available abstract

Abstract The adsorption of a cetyltrimethylammonium bromide (CTAB) cationic surfactant on a natural zeolite from an aqueous solution is studied for a wide range of concentrations. It is shown that a modified BET equation can be used for bimolecular adsorption. It is found that after the first few hours of adsorption from a premicellar solution, there is a lack of both cetyltrimethylammonium cations and bromide anions, due to their codiffusion to the ion-exchange sites. It is concluded that adsorption from a colloidal solution occurs via the adsorption of micelles, their subsequent degradation, and the formation of a bimolecular adsorption layer.

Key concepts: Adsorption, Bromide, Chemistry, Zeolite, Aqueous solution, Pulmonary surfactant, Inorganic chemistry, Micelle

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