Experimental and modeling of nickel removal from sulfate solutions by emulsion liquid membrane using PC 88A

Abstract

AbstractThe removal of nickel from sulfate media using emulsion liquid membrane with PC 88A as carrier was studied by simulation and experimental method. Combining reasonable assumptions from the existing models, a modified mathematical model was developed. It was assumed that the concentrations at the external interface were in dynamic equilibrium. The mass transfer rate of the nickel–carrier complexes at the interface of the emulsion droplet and that of the nickel ions in the external feed solution were assumed to be equal. According to these modifications, the computational results could agree well with the experimental data. The total average value of the squared residuals was less than 0.022. The effects of agitation speed, volume ratio, and the concentration of the nickel ions and that of the PC 88A on the removal rate of nickel were investigated. The concentration of the PC 88A has shown greater influence on the nickel removal in comparison with the other parameters. Under typical conditions, the r...