In the present study, the analysis and optimization of the extraction of cadmium by emulsion liquid membrane process has been studied. The response surface methodology (RSM) was employed to identify the effect of emulsion liquid membrane parameters. These included the tri-octyl-phosphine oxide (TOPO) concentration, sorbitan monooleate (Span 80) concentration, internal sulfuric acid concentration, external/emulsion phase ratio, stirring time and external phase acidity (pH). A reduced quadratic model was found to best fit the experimental data. The model was employed to evaluate the optimum combination levels of emulsion liquid membrane process parameters. The results showed a statistically significant effect of TOPO, Span80, and internal sulfuric acid concentrations on the extraction percentage of cadmium. A statistically significant interaction was found between Span 80 and external/emulsion ratio, between TOPO and Span 80, and between TOPO and internal sulfuric acid. The analysis of results depicted that the TOPO concentration with a contribution percent of 84.7 and 2.09% for Span 80 had the dominant effect on extraction% of cadmium
Optimization of Cadmium Extraction by Emulsion Liquid Membrane with Response Surface Analysis. Available from: http://www.researchgate.net/publication/280053551_Optimization_of_Cadmium_Extraction_by_Emulsion_Liquid_Membrane_with_Response_Surface_Analysis [accessed Jul 22, 2015]. |
