| Conventional chemical stripping is not economically viable for the solvent extraction of oxidized iron compounds generated from a variety of industrial wastes. To alter an alternative treatment, a spontaneous electrolytic process has been invented as a promising, relatively inexpensive and highly efficient technique on the issue of iron removal. Other applications of galvanic stripping include thin film coatings on certain metal substrates which are of interest in the electronics industry.;In galvanic stripping, a solid metal is used as the reductant for cations, taking them to either a lower oxidation state or total reduction. However, a variety of operating parameters, such as water and oxygen concentration, metal reductant type and surface area, temperature, diluent, organic concentration, stripping solution, A/O ratio, separate and simultaneous stripping, can considerably affect the reaction rate and efficiency. Some of the effects of these variables in laboratory tests are also presented.;The objective of this study is to investigate the fundamental electrochemical behavior of metals in various organic extractants using potential measurements and electrochemical impedance spectroscopy, and also examine the dielectric behavior of water/di(2-ethyihexyl) phosphoric acid/kerosene systems using dielectric spectroscopy. The results were to be used in establishing a better and more complete understanding and optimization of the process. A preliminarily design for a continuous process using galvanic stripping for iron removal from a zinc residue has been developed as an example of an industrial application of galvanic stripping. |
