Electrochemical Separation of Metal Silver from Industrial Wastewater
Affiliation(s)
Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria.
Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria.
ABSTRACT
Investigation into the separation of metal silver from industrial wastewater using electrochemical cell was carried out. Wastewater from photo laboratories was collected and treated batch wise using electrolytic equipment. A constant voltage of 2.0 V and variable current in the range of 0.3 - 0.6 A at normal temperature were passed through the electrolyte for a period from 0.25 - 1.0 h. The results showed that increase in current yield an increase in the amount of metallic silver recovered with highest values of 2.3 g and 2.8 g at 0.6 A for the tested samples 1 and 2, respectively. The electrochemical separation method proved to be more reliable and economical when compared to other methods and also, reduction in environmental pollution of industrial wastewater containing high concentration of silver metal is achieved.
Investigation into the separation of metal silver from industrial wastewater using electrochemical cell was carried out. Wastewater from photo laboratories was collected and treated batch wise using electrolytic equipment. A constant voltage of 2.0 V and variable current in the range of 0.3 - 0.6 A at normal temperature were passed through the electrolyte for a period from 0.25 - 1.0 h. The results showed that increase in current yield an increase in the amount of metallic silver recovered with highest values of 2.3 g and 2.8 g at 0.6 A for the tested samples 1 and 2, respectively. The electrochemical separation method proved to be more reliable and economical when compared to other methods and also, reduction in environmental pollution of industrial wastewater containing high concentration of silver metal is achieved.
Cite this paper
Olutoye, M. and Alhamdu, J. (2014) Electrochemical Separation of Metal Silver from Industrial Wastewater. Advances in Chemical Engineering and Science, 4, 396-400. doi: 10.4236/aces.2014.44043.
Olutoye, M. and Alhamdu, J. (2014) Electrochemical Separation of Metal Silver from Industrial Wastewater. Advances in Chemical Engineering and Science, 4, 396-400. doi: 10.4236/aces.2014.44043.
References
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[1] Luoma, S.N. (2008) Silver Nanotechnologies and the Environment: Old Problems or New Challenges? Project on emerging Nanotechnologies, Woodrow Wilson International Center for Scholars, 1-72. [2] Company, K. (1979) Recovery of Silver from Photographic Materials. Kodak Environmental Information J-110, Eastman Kodak Company, New York, 2-5. [3] Heller, W.G. and LeSchack, A.R. (1981) Military Geodesy and Geospace Science Unit Three—Scientific Report No. 7. The Analytic Sciences Corporation, Reading, 1-171. [4] Tom Sandy, P.E. and Cindy Disante, P.E. (2010) Review of Available Technologies for the Removal of Selenium from Water. Prepared for North American Metals Council, 1-233. [5] Ncjewelers.org/jewelry_info/silver1.html access date 1st February 2014. [6] Robinson and Stokes (1955) Electrolyte Solutions. 2nd Edition, Academic Press, New York, 30-37. [7] Othman, K. (1987) Encyclopedia of Chemical Technology. 3rd Edition, Volume 18, 275-310. [8] Waite, J. (1997) Photographic Chemistry. University of Houston College of Technology, Houston, 1-11.