Regularities of Changes in the Adsorption Properties of Clays Activated by Pressure and Ions of Iron

M. A. Dzhuginisov, A. V. Andrianov, K. V. Sheina, S. G. Ashikhmin

Abstract


The purpose of the work is to consider the patterns of adsorption of water vapor by clay soils that have been treated with pressure and saturated with iron ions, and also to study the processes of adsorption and desorption of Fe3+ ions by bentonite and kaolin clays. The study of changes in the adsorption properties of clay soils is necessary to understand the processes occurring in soils, both in natural and anthropogenic conditions, especially in the case of soil contamination. As a result of the experiment, it was found that the adsorption capacity of clays in relation to water vapor increases when they are treated with pressure. When clay is treated with pressure and subsequently saturated with iron ions in bentonite clay, the adsorption activity decreases in the range of 0-150 MPa, at higher pressures it changes irregularly. In kaolin, adsorption increases at pressures up to 200 MPa, but it decreases at pressures from 200 to 800 MPa.

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DOI: http://dx.doi.org/10.17072/psu.geol.22.4.333

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