Preliminary studies on the electrochemical recovery of Zn and Cd from effluent produced by a zinc refinery plant using a filterpress reactor
Article first published online: 17 DEC 2012
© 2012 Society of Chemical Industry
Journal of Chemical Technology and Biotechnology
Volume 88, Issue 7, pages 1371–1379, July 2013
How to Cite
González Pérez, O., Castro Larragoitia, S. and Rodríguez-Torres, I. (2013), Preliminary studies on the electrochemical recovery of Zn and Cd from effluent produced by a zinc refinery plant using a filterpress reactor. J. Chem. Technol. Biotechnol., 88: 1371–1379. doi: 10.1002/jctb.3988
- Issue published online: 6 JUN 2013
- Article first published online: 17 DEC 2012
- Manuscript Accepted: 16 OCT 2012
- Manuscript Revised: 14 OCT 2012
- Manuscript Received: 27 JUL 2012
- electrochemical reactor;
- industrial effluent;
- wastewater treatment;
Fundamental studies are reported investigating the electrochemical deposition of cadmium and zinc contained in solutions from a zinc electro-refining plant. This work also analyzes the performance of a filterpress electrochemical reactor used in the recovery of zinc and cadmium from this effluent.
The cathodic polarization curves showed electrochemical processes with mixed control for 304 SS and Al. The cyclic voltammetry studies on stainless steel revealed the presence of metal deposits at low current densities, whereas Zn and Cd were preferentially deposited at high overpotentials. The greatest recovery of cadmium (19%) and zinc (24%) at jap = 4 mA cm-2 was obtained with a 304 SS cathode and t = 180 min. The SEM micrographs of cathode plates confirmed the presence of cadmium and zinc deposits. In addition, EDS analyses revealed that the composition of such deposits depends on the deposition time and the cathode material.
A continuous filterpress electrochemical reactor with 304 SS and Al cathodes exhibited a promising performance level for cadmium and zinc recovery from industrial solutions.