THERMODYNAMICS OF THE DESORPTION PROCESS AND FEATURES OF REGENERATION OF ADSORBENTS BASED ON BENTONITE CLAY

21.09.2023 International Scientific Journal "Science and Innovation". Series A. Volume 2 Issue 9

N.B.Mukhtorova, B.A.Aliev, B.T.Sabirov, U.F.Umirov

Abstract. The article is devoted to the results of research on the study of regeneration processes of adsorbents after their use in wastewater treatment from metal ions. During the experiments, it was established that the process of moisture desorption from bentonite begins at temperatures above 97 °C and consists of two stages. The barogram equation, temperature ranges and thermodynamic characteristics of individual stages of the desorption process in bentonite clay have been compiled. The experimental data were processed using the least squares method at a 95% confidence level using the t-value of the Student coefficient. The effectiveness of bentonite clay in softening artesian water in Tashkent, used in “Bektemir metall constructions” OOO, has been established, when softening it with a total hardness index of 5.8 mEq/l, the Na-form of the tested sorbent allows reducing the total hardness to 1.4 mg-eq/l, which indicates the high efficiency of the water softening process.

Keywords: sorption, sorbents, adsorbent, wastewater sorption capacity, water treatment, aluminosilicates bentonite, regeneration, solution pH