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    STUDIA CHEMIA - Issue no. 1-2 / 1999  
         
  Article:   PARTICULATE BED CATHODE FOR COPPER ION REMOVAL FROM WASTEWATERS. PART II: A CORRELATION BETWEEN COPPER RECOVERY, CURRENT EFFICIENCY AND ENERGY CONSUMPTION.

Authors:  ANCA MIHAELA MIHAI, LIVIU ONICIU.
 
       
         
  Abstract:  An analysis based on current efficiency and energy consumption for Cu2+ recovery from wastewater, using a copper particulate bed cathode, was attempted. The influence of current intensity on the Cu2+ recovery and current efficiency was comparatively examined in order to establish the optimal value of electrolysis current. Additionally, the optimal value of electrolysis time was established based on an economic evaluation. The investigated method was proved to be efficient for Cu2+ removal from wastewater. Thus, after 140 minutes of galvanostatic electrolysis (at 0.25 A) the Cu2+ level (10-2 M) of 1.5 L of wastewater was reduced with 80%, with a 34.7 % current efficiency. The optimal experimental configuration for the process was attained using a copper powder cathode (10 g, in 0.2 - 0.125 cm size range), a stainless steel sieve as current feeder, and an electrolyte circulation speed of 2 cm/s.  
         
     
         
         
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