A Mini-Review on Methods of Solvent Extraction Kinetics for Heavy Metal Ions

The solvent extraction can be used in the separation of metal ions from electronic waste, associate mineral and industrial waste containing metals. The investigations of kinetic are important to the optimization and design of reactors for the application of solvent extraction. The research method of solvent extraction kinetics is important to obtain reliable kinetic parameters. Therefore, this paper mainly introduces the typical methods for the solvent extraction kinetics, including single drop method, constant interfacial area cell, microfluidic method, rotating diffusion cell method, AKUFVE method, high speed stirring extraction method, and common extraction experiments. The classical extraction examples, equipment, merits and demerits of these methods were discussed in this paper, which provided useful information for selecting a suitable method with aim of obtaining reliable kinetic parameters for the separation of metal ions.