APPLICATION OF CUCURBITURIL DERIVATIVES TO DYE REMOVAL AGENT

Glycoluril-formaldehyde copolymer, obtained by the reaction of glycolu ril with formaldehyde, is an insoluble compound in water and in most o rganic solvents. This copolymer can be converted into a macrocyclic co mpound named ''cucurbituril'' by further reaction. In this study, we f ound that this copolymer effectively decolorized direct dyes and react ive dyes aqueous solution and that the decolorization efficiency was n ot only uninfluenced by temperature and pH, but also considerably bett er than that of cucurbituril. Mechanism of decolorization was investig ated by using model compounds for the dyes.