Modeling of Pertraction of Cadmium(II) by ELM of Co(III)dicarbolide in Xylene Using Nitrilotriacetic Acid as Stripping Agent

Extraction of Cadmium(II) ions from aqueous solutions by Co(III)dicarbolide in xylene using the emulsion liquid membrane (ELM) technique was investigated. As stripping agent, nitriloacetic acid (NTA), was used. Experimental results for the batch extraction of Cd(II) ions using a surfactant 80/85 are presented. The effects of various parameters such as feeding phase, membrane phase, stripping phase concentrations and the pH of the external phase were investigated. It was found that the most effective parameters in the extraction of Cd ion are pH of the external phase and concentration of the stripping agent in the internal phase. A simple empirical model was deduced to predict the rate of pertraction in such system.