Survey Electrocoagulation Process in Removal of Acid Blue 113 Dye from Aqueous Solutions

Treatment of textile industry wastewaters, due to having color and many pollutants, is one of the most important environmental issues. Acid Blue 113 dyes because of having benzene ring, which is not biodegradable, is toxic and carcinogen. The main objective of this study was determination of electrochemical process efficacy for removal acid blue 113 from aqueous solutions by using aluminum electrodes in batch reactor.
This study performed in lab-scale in batch reactor. The effect of different parameters such as voltages (10, 20, and 40 volt), electrode distance (0.5 and 1 cm), and electrolysis times (5 to 80 min) was investigated.
The results of experiments demonstrated that with applying voltage 40V, 0.5 cm distance between electrodes, electrolyte concentration equal to 5 g/l, and 20 minutes electrolysis time, the color and COD removal rate was 99 and 78%, respectively. By increasing voltage and reaction time and reducing distance between the electrodes, power consumption is reduced and also final pH and dye removal efficiency increased.
According to the results, the best removal efficiency of dye was obtained after 20 minutes contact time on the electric potential of 40 V, which was 99%. This process is environmental friendly and can be economically acceptable. Therefore, it can be results that electrocoagulation process by using aluminum electrode is an efficient and suitable method for acid blue 113 dye removal from aqueous solutions.