Abstract
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% H 2 SO 4 and 10% HNO 3 were selected, because bentonite was modified with 10–98% H 2 SO 4 and 10–65% HNO 3 acids during the study. Among these concentrations, according to the results of various studies, 20% H 2 SO 4 and 10% HNO 3 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.