Comparison of Electro-Coagulation Process (EC) and Electro Oxidation (EO) Process for Degradation of Acid Blue Dye 113(AB113) from Aqueous Solutions

dye stuff effluents can disturb ecological and aesthetic aspects of environment; eutrification of surface waters is one of these most common problems. These processes cause pollutants decomposition through electrical current. The aim of this study was comparison between the effectiveness of the processes of electrochemical coagulation (EC) and electrical oxidation (EO) in degradation of AB113 dye from aqueous solutions. in this experimental study, removal of AB113 dye was investigated at different concentrations in a 2 cm distance from each other, through processes EC and EO. Also, the effect of parameters pH (5-9), voltage (10-30 volt, range 1-3 A) and initial dye concentration (50-500 mg/L) was studied at the optimum time of each process. The assay of dye concentration was conducted according to the standard methods. the results showed that both processes have high efficiency in dye degradation. At best conditions of EC (voltage=30 volt, pH=3, initial concentration=50 mg/L and time=40 min) and EO (voltage=30 volt, pH=7, initial concentration=50 mg/L and time=50 min), the efficiencies were 93.73 and 95.75%, respectively. By changing in conditions of experiment, the degradation efficiency decreases in these two processes. Discussion & Both of these processes have suitable efficiency in azo dye AB113 removal. pH, voltage, initial dye concentration and electrode type play an important role in the efficiency of these processes, and a change in each of these parameters can change the efficiency of dye decomposition.