Influence of Different Anode Materials on the Treatment of Azo Dyed Wastewater by Electrochemical Method
The paper aimed to compare removal effects in azo dyed wastewater by electrochemical method with different anode materials, and explored the impact of current density on the treatment effect with different electrode materials. Carbon felt, aluminum, iron were served as the anodes, graphite columns were served as cathodes of apparatus. The hydraulic retention time was 12 hours, current density is respectively 0.01, 0.024, 0.048, 0.071, 0.083 mA/cm² for the test. The results showed that the removal ratio of dye concentration had a rising trend as the current density increased. The removal ratio by the apparatus with iron anode was best, aluminum second. When the current density was 0.083 mA/㎝², the removal ratio of dye concentration was 97.63%, but the other two were only 62.01% and 29.05%. The removal of colority and COD with aluminum anode was best, when the current density was 0.048mA/㎝², the removal ratio of colority and COD was respectively 71.39% and 44.41%. Thus, the removal of dye concentration by electrochemical method with iron anode was best, while aluminium anode was good for colority and COD. The treatment of azo dye wastewater by carbon felt anode electrochemical didn’t get significant effect.
Qing Yang, Li Hua Zhu, Jing Jing He, Zeng Feng Yan and Rui Ren
Y. H. Zhao et al., "Influence of Different Anode Materials on the Treatment of Azo Dyed Wastewater by Electrochemical Method", Advanced Materials Research, Vols. 368-373, pp. 3221-3225, 2012