Separation Science and Technology, Vol.40, No.11, 2353-2364, 2005
Process intensification: Extraction of Chromium(VI) by Emulsion Liquid Membrane
Electroplating is one of the important processes involved in surface finishing and metal deposition for better life of articles and for decoration. Chromium(VI) is the most commonly used metal for electroplating. Thus, the waste water of such industries contains Chromium(VI) ions. Emulsion Liquid Membrane (ELM) separation technique provides a potentially powerful technique for the removal of Chromium(VI) ions from the waste water. In the present study, the effect of different parameters such as pH, different carriers concentration, synergistic effect caused by a mixture of two appropriate carriers concentration, effect of electrostatic surface potential and effects of composition of a dilute polymer solution; which will intensify the extraction efficiency of Chromium(VI); are systematically investigated using Aliquat 336 and tri-n-octyl amine as extractant, sorbitan mono-oleate (span 80) as surfactant, kerosene as membrane phase and sodium hydroxide as stripping solution.