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Received October 26, 2004
Accepted July 15, 2005
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Lead Recovery from Waste Frit Glass Residue of Electronic Plant by Chemical-Electrochemical Methods
Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand
kejvalee@sc.chula.ac.th
Korean Journal of Chemical Engineering, November 2005, 22(6), 873-876(4), 10.1007/BF02705667
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Abstract
This work aims at recovering lead from frit glass waste of electronic plants by using the electrochemical method comprising two successive steps of lead leaching and electrodeposition. In the leaching step, it was found that nitric acid and acetic acid are better solutions for the dissolution of lead oxide compared with sodium hydroxide, hydrochloric acid, and sulfuric acid. More than 95% of the lead was leached by 0.1M nitric acid or 0.5M acetic acid at 0.5% weight by solid volume. In the electrodeposition step, more than 95% of lead can be removed with high current efficiency from the leaching solution at an optimum current density. The values of the optimum current density of 0.5 and 1M acetic electrolytes were between 8.8-10 mA/cm2, whereas those for 0.1M and 0.5M of nitric acid were 15 and 27.5 mA/cm2, respectively.
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