Abstract
A procedure for treatment of simulated wastewater solutions to remove Cu2+, Ni2+, and SCN− ions using various combinations of aluminum and iron electrodes in the electro- and peroxyelectrocoagulation processes was studied. The influence exerted by the current density, pH of solution, and concentrations of impurities and hydrogen peroxide on the efficiency of removal of these ions was analyzed. Electrocoagulation using aluminum anode does not lead to a significant decrease in the thiocyanate concentration. In the peroxyelectrocoagulation process, the efficiency of removal of SCN− ions increases with an increase in the [H2O2]: [SCN−] ratio. The electrocoagulation efficiency with the Fe/Fe electrode pair reaches 87% for SCN− and 99.5% for Cu2+ and Ni2+ at a current density of 20 mA cm–2 and electrolysis time of 20 min.
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