Green processing of industrial waste and obtaining adsorbent for purification of sulfur dioxide

Abstract The article discusses current problems in the field of ecology and environmental protection related to the processing of industrial waste and the purification of sulfur dioxide. A technology has been developed for the purification of sulfur dioxide using phosphorous slag based on waste from phosphorus production as an adsorbent. Instrumental methods SEM, IR, TGA/DTA and X-ray were used to determine the physicochemical properties of the initial and final products. In the process of obtaining the adsorbent, a temperature of 500 °C was determined for 120 min, and optimal technological parameters were established during purification of sulfur dioxide: a temperature of 500 °C for 30 min, and the degree of efficiency is up to 65 %. The used adsorbent after sorption of sulfur dioxide is subjected to regeneration by thermal treatment at 800 °C for 120 min. After thermal treatment, the adsorbent is restored to its original state and is reused for purification of sulfur dioxide. The developed adsorbent based on phosphorous slag for purification of sulfur dioxide is 7.0–7.5 cheaper than analogues. The developed technology is aimed at processing accumulated industrial waste to obtain adsorbents for cleaning sulfur dioxide, which in turn improves the environmental situation in the region.