Gemini micellar enhanced ultrafiltration (GMEUF) process for the treatment of phenol wastewater

► Gemini surfactant micellar-enhanced ultrafiltration was used to remove phenol. ► The increment of CG concentration and nonionic surfactant improved the performance. ► Electrolyte and temperature had a negative influence on the phenol retention. ► Gemini surfactant had superior performance in solubility for phenol.