Benzene Adsorption Energy in Activated Azkamar Bentonite Samples

Abstract

Clay minerals are based on aluminum, silicon oxide and other alkaline and alkaline earth metals. Clay minerals have different shapes and structures depending on the environment. Researchers are interested in studying the specific surface area of clay mineral adsorbents by adsorption of polar and non-polar molecules on the basis of the laws of surface chemistry. Based on the adsorption properties in the sorption of adsorbate molecules, it is possible to determine the structure of the sorption layers that form bentonite, the migration of cations.Due to the low charge value and weak electrostatic interaction between the three-layer surface and the multi-layer cations, the minerals of the montmorillonite group are capable of multi-layer sorption of various substances, cations, water molecules, and many organic compounds.In other words, in this group of minerals, the processes of metabolism, absorption and desorption can take place not only on the outer surface, but also on the inner surface of the crystallite.The obtained data contribute to the development of the theory of adsorption forces and intermolecular interactions. Determination of benzene adsorption isotherm, differential temperatures and thermokinetics in Azkamar bentonite was carried out using the method of adsorption calorimetry in a high vacuum adsorption device. They are based on differential molar entropy and free adsorption energy. Adsorption isotherms were described using BET and Langmuir equations. The mechanism of benzene adsorption in this bentonite is fully explained.