WASTEWATER TREATMENT USING MODIFIED NATURAL SORBENTS

This article presents the results of a study of the effectiveness of using natural mineral sorbents based on zeolite, bentonite clays and diatomite in the low mountains of Zhetysu (Dzungar) Alatau for purification and conditioning of drinking water and wastewater treatment from sulfates, bicarbonates, nitrates, heavy metal ions and other harmful impurities .

The physicochemical and mineralogical composition of natural sorbents and the adsorption efficiency of the resulting combined sorbents were studied, and an increase in sorption activity was found depending on the composition of the sorbent and the influence of modification of the sorbents on the firing temperature. To increase the adsorption capacity of sorbents during heat treatment, the mechanism of thermal activation was used, which is due to the removal of adsorbed and constitutional water, that is, an increase in total porosity. Close to thermal activation is the method of hydrothermal modification of natural sorbents - treatment in water vapor at high temperatures and pressure.

The scientific and practical value of our research is to obtain a modification of the sorbent for wastewater purification, with simultaneous sorption of chemical and microbiological contaminants contained in water, promoting disinfection and softening of water, increasing the degree of saturation of the treated water with calcium, magnesium salts and microelements, not requiring for use complex equipment. The technical result consists in creating a modified complex of natural adsorbents with the sorbing ability of chemical and microbiological contaminants, disinfecting and softening water, enriching it with calcium, magnesium, sodium, potassium ions, as well as microelements.

Experiments conducted on the use of natural mineral sorbents in water purification processes from contaminants have revealed significant differences in the effectiveness of the considered sorbents, determined by their mineral composition, microstructure, sorption capacity and the presence of catalytic activity.