ACID MODIFICATION OF BENTONITES KALZHAT AND ORTA TENTEK AND STUDY THEIR PHYSICOCHEMICAL PROPERTIES

In this work was investigated the methods of acid modification of bentonite clays from the Kalzhat and Orta Tentek deposits located in the Almaty region of Republic Kazakhstan with sulfuric and nitric acid in various concentrations and determined the effective concentration. In this study, the effective concentrations of 20% H₂SO₄ and 10% HNO₃ were selected, because bentonite was modified with 10–98% H₂SO₄ and 10–65% HNO₃ acids during the study. Among these concentrations, according to the results of various studies, 20% H₂SO₄ and 10% HNO₃ acids were found to be effective, and the concentrations given in this work were considered effective. The obtained results were studied by the IR-spectroscopy FTIR, X-ray fluorescence, X-ray diffractometer and scanning electron microscope methods. Bentonite modification has a positive effect on opening the interlayer space of clay and improving its properties. After purification and modification, bentonite clay can be used in agriculture, manufacturing, medicine, and various fields such as drilling, construction and water purification.

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