Abstract
The paper compares the electrocoagulation performance during the removal of Acid Brown 14, Acid Yellow 17, Acid Blue 113
and Acid Black 172 dyes from aqueous solutions. For this purpose, pH changes and effectiveness of main parameters including
initial dye concentrations and current densities for the selected dyes were examined. In addition, effluent turbidity, energy
consumption and amounts of released aluminum were also investigated. The present work shows that Acid Yellow 17 removal
efficiencies were less than 30% in contrast with more than 90% for Acid Brown 14, Acid Blue 113 and Acid Black 172 at the end
of experiments. The dye removal efficiencies, within first time interval (5 min) and at the best elimination conditions (initial dye
concentration=100 mg/L and current density=250 A/m2) were measured 12.47%, 85.67%, 95.07% and 99.52% for Acid Yellow
17, Acid Black 172, Acid Brown 14 and Acid Blue 113, respectively.