Alternative method for exhausted dye bath recycling based on removal of residual dissolved reactive anionic dyes

Abstract

This work presents precipitation and removal of hydrolyzed reactive dyes by action of liquid ion exchangers in co-action of inorganic flocculant. After addition of cationic surfactant and aqueous aluminium chloride the precipitation occurs and practically decolorized aqueous phase is obtained. The treated water was completely decolorized and purified by addition of powdered charcoal.