Removal of Hexavalent Chromium-Contaminated Wastewater by Micro-Emulsion Liquid Membrane Method

• DOI: 10.4028/www.scientific.net/amr.356-360.1962
• Publication Date: 2011-10-07T18:49:23Z
• Authors: Chun Shan Zhu; Li Qiu; Jia Song; Yan Li Yuan
• Keywords: Hexavalent Chromium; Kerosene; Tributyl phosphate; Aqueous two-phase system

The micro-emulsion liquid membrane (MELM) was prepared for the extraction of hexavalent chromium (Cr (Ⅵ)) from wastewater. phase consists kerosene as a solvent, tributyl phosphate (TBP) mobile carrier, and sorbitan monooleate(Span80) surfactant. A NaOH solution is internal aqueous phase. effects different conditions on extractive Cr (Ⅵ) were discussed. results showed that removal rate could reach 99.78% when concentration 0.1mol•L -1 in phase, pH values 1.0-1.75 external Rew 1:3 Roi 2:1, stirring time 12min 320r•min , 10% carrier 15%-17%