INFLUENCE OF THE NATURE OF THE MODIFIER ON THE SORPTION PROPERTIES OF SHANKANAI ZEOLITE

Abstract

Sorbents modified with hydrochloric acid and chitosan based on the Shankanai bridge formation zeolite were obtained, and the effect of drying temperature on the sorption properties of sorbents was studied. It was found that 25 °C is the optimal temperature for obtaining acid-modified zeolite. A chitosan-modified sorbent with good sorption characteristics can be obtained at 25 °C with cation-exchange (COE 68.05 mg-eq/g) and 70°C with anion-exchange (SEC 70.16 mg-eq/g) properties. Physicochemical analysis of modified zeolites showed an increase in the size of voids and channels on the surface of acid-modified zeolite, and when modified with chitosan, the latter is crosslinked with the surface of natural zeolite.