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    STUDIA CHEMIA - Issue no. 2 / 2012  
         
  Article:   HYDROMETALLURGICAL FLOW FOR ZINC RECOVERY FROM Zn-MnO₂ WASTE BATTERIES. I. ZINC SOLUBILIZATION FROM ANODIC REMNANTS.

Authors:  P. ILEA. 		 
       
         
  Abstract:  The present study is focused on the electrochemical recovery of zinc anodic remnants from Zn-MnO₂ waste batteries and the development of a combined flow scheme that allows the recovery of zinc by electrodeposition with satisfactory energy consumption related to the amount of Zn deposited. Batch laboratory experiments were performed to evaluate the electrochemical dissolution/winning parameters (electrolyte composition, pH, current density) in acidic medium. The proposed flow scheme aims at the electrodissolution of anodic remnants from waste batteries. Using the electrochemical method were achieved a high cathodic current efficiencies, approximately 98 % for Zn electrodeposition and also an improvement of the solubilization degree in comparison with the chemical solubilization using as anode Zn remnants in 0.5 M H₂SO₄.

Keywords: Zn-MnO₂ batteries, electrochemical dissolution, energy consumption 		 
         
     
         
         
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