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An experimental study concerning the copper removal from a simulated wastewater containing 10 ppm of Cu²⁺ ions was performed in a continuous flow electrochemical reactor equipped with a rectangular three-dimensional (3D) cathode made of reticulated vitreous carbon (RVC) with 100 ppi porosity. The influence of low supporting electrolyte concentrations and of the electrode polarisation potential was investigated. The reactor performance was evaluated considering the residual copper concentration and the specific energy consumption. After 90 min of electrolysis, the copper ion concentration was reduced to less than 0.1 ppm, permitting the discharge of the treated solutions to the drain system. With an operating cell voltage around 1.8 V, specific energy consumptions close to 0.18 kWh per cubic meter of treated wastewater was calculated.

Keywords: removal, copper, reticulated vitreous carbon electrode, waste waters