PROPERTIES, STRUCTURE OF ENVIRONMENTALLY FRIENDLY SORBENTS BASED ON NATURAL RAW MATERIALS

Abstract

The article presents data on the selection of natural raw materials corresponding to the structural material in the preparation of effective sorbents. It is noted that clay minerals in composition and physicochemical properties fully meet the requirements for the development of effective sorbents and have important scientific and practical significance for industry. It is noted that wastewater from a number of industries, in some cases, is contaminated with cations of various heavy metals, such as Cu2+, Zn2+, Ni2+, Cr3+, Co2+, Pb2+, Mn2+, Cd2+ etc. It has been established that modification of natural aluminosilicates improves their sorption properties. It has been shown that the modified Na-form of natural bentonites in weakly acidic and alkaline environments exhibits better colloidal properties and is capable of rapidly absorbing heavy metal ions.