:: Journal of International Environmental Application & Science ::

Year 2006, Volume I (Issue III-IV)

Journal of International Environmental Application and Science , Vol. 1, No. 1 (2006), 91-97


Chromate removal from wastewater using micellar enhanced crossflow filtration: effect of transmembrane pressure and crossflow velocity

Ummuhan DANIS, Bulent KESKINLER

Department of Environmental Engineering, Atatürk University, 25240, Erzurum, Turkey

Accepted 13 December 2006

Abstract: TRemoval of chromate from wastewater was investigated using Micellar Enhanced Crossflow Ultrafiltration Technique (MEUF) with cationic surfactant, didecyldimethylammonium bromide (DDAB). The variation of chromate, surfactant rejections, and permeate flux with time were measured as a function of transmembrane pressure drop (P), and crossflow velocity, while maintaining DDAB/chromate, membrane pore size, and pH of the feed solution constant. The method was found to be effective in removing chromate from wastewater. It was observed that the efficiency of chromate removal increased with increasing transmembrane pressure drop (P), and crossflow velocity. It was found that fouling of the membrane by surfactant is very rapid at the high crossflow velocity.  
Keywords: Crossflow, ultrafiltration, micellar enhanced ultrafiltration, chromate removal, wastewater treatment.