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Electrolytic recovery of silver from low concentrated silver cyanide spent plating solutions

IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi

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Title Electrolytic recovery of silver from low concentrated silver cyanide spent plating solutions
 
Creator Ramesh Bapu, G.N.K.
Eagammai, C.
Jayakrishnan, S.
 
Subject Industrial Metal Finishing
 
Description Cyanide silver solution containing 200 to 1000 mg L21 silver ions were used for recovery studies. The nature of the silver deposit was studied using a Hull cell, and the current density range was selected for electrolysis to recover silver. A batch electrochemical reactor, consisting of a planar stainless steel cathode and platinum anode was used and silver was recovered at 0?04 to 0?2 A dm22. The effect of different initial silver concentrations on the electrochemical recovery of the metal was investigated as a function of electrolysis duration at various current densities. The cathode current efficiency and the energy consumption were determined for the solutions for various experimental conditions. Surface morphology and structure of the silver deposit was also studied using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that irrespective of the initial silver concentration, higher current efficiency and lower energy consumption can be achieved at a low current density. For a given current density, the energy consumption to recover silver is lower from relatively concentrated than from dilute solutions.
 
Publisher Maney Publishing
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cecri.csircentral.net/478/1/171-2008.pdf
Ramesh Bapu, G.N.K. and Eagammai, C. and Jayakrishnan, S. (2008) Electrolytic recovery of silver from low concentrated silver cyanide spent plating solutions. Transactions of the Institute of Metal Finishing, 86 (1). pp. 66-72. ISSN 0020-2967
 
Relation http://cecri.csircentral.net/478/