Structural Features of Irreversible Composite Sorbent Based on Calcium Silicates and Aluminum Silicates

Abstract

Evolution of the short-range order of the composite granular sorbent based on calcium silicates and aluminum silicates is studied in the series: original state – after soaking in distilled water – after sorption of copper. It is shown that irreversible sorbent composition is a hydrolytically active open physico-chemical system. During the synthesis of the sorbent in the environment of H₂O and CO₂ reactions of defect formation occur resulting in the formation of carbonate spurrite structurally related to calcium silicate. Carbonate spurrite creates additional active sites for sorption of copper to form a stable hydrated mixed carbonate structures.