Abstract
The surface heterogeneity of two samples of montmorillonite clays from Katiola (C?te d’Ivoire), referenced K1 and K2, has been explored by low-pressure of argon and nitrogen adsorption at 77 K. The adsorption isotherms of the studied samples have been modelled by the Derivative Isotherms Summation method (DIS method) in a satisfactory manner, with the help of local isotherms to argon and nitrogen. The use of the DIS method allowed us to quantify the basal and lateral surfaces, then to determine the total surface of studied materials. Beyond the quantitative aspect, the DIS method permitted us to determine the lamellarity index of the clay grains and to describe the two studied samples of a family of high energy site (–14 kT to nitrogen), that shows a strong affinity for the polar adsorbates.
Highlights
The strong increase of the population and the uncontrolled industrialization policy in Côte d’Ivoire are the results of a more and more increasing production of solid and liquid wastes [1]
The Derivative Isotherms Summation (DIS) method permitted us to determine the lamellarity index of the clay grains and to describe the two studied samples of a family of high energy site (–14 kT to nitrogen), that shows a strong affinity for the polar adsorbates
In a lot of processes that make with the clayey material, it is necessary to determine with precision the distribution of the different faces, to study in good conditions the mechanisms that have place and the properties that result
Summary
The strong increase of the population and the uncontrolled industrialization policy in Côte d’Ivoire are the results of a more and more increasing production of solid and liquid wastes [1]. The acquisition of precise isotherms from the very low pressures, coupled with the modelling of the derivative isotherms today, permits us to reach numerous informations on the superficial energizing properties of the solid. To this effect, the use of the DIS method permits the quantification of the basal and lateral surfaces, and the determination of the total surface of the studied materials [12,13]. It is a contribution to the literature on external properties of the argillaceous materials, which are likely to be employed like alternate materials in the technology of environmental protection [14,15,16]
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