Graphene oxide membranes with amine intercalation for dye recovery from textile effluents

• Graphene oxide membranes were successfully used in textile effluent filtration. • Amine intercalation in the membranes significantly increased their permeability. • Amine-membranes showed low salt retention, allowing their separation from the dye. • The use of ethanol as solvent produced a significant increase in salt retention. The textile industry generates significant amounts of wastewater, with dyes and salts as primary contaminants. One method to valorize this wastewater is by separating dyes, enabling the reuse of both dye and water. This study focuses on developing graphene oxide (GO) membranes modified with various amines and solvent media to achieve selective separation. Among the membrane tested, those prepared using 1,3-diaminopropane exhibited excellent performance, achieving high dye rejection (>97 %) and low salt rejection (32 %) while maintaining good permeability. These findings highlighting the potential of GO membranes for improving dye recovery and reuse.