Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins.

The generation of residues containing dyes by industrial sectors has been mobilizing scientists to develop methodologies capable of treating water containing these contaminants. Adsorption is an option to remove these molecules from the aqueous medium and, for this study, the composites between silica and cyclodextrins alpha (α-CDSI) and gamma (γ-CDSI) were used to capture methylene blue. Adsorption was spontaneous for both composites ( < 0) and characterized as exothermic and of a physical nature, with of -17.