Comparative Electrochemical Degradation of the Acid Yellow 49 Dye Using Boron-Doped Diamond, β-PbO2, and DSA® Anodes in a Flow Reactor
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2015-02-01 |
| Journal | International Journal of Electrochemical Science |
| Authors | Naihara Wächter, Gabriel Fontes Pereira, Romeu C. Rocha‐Filho, Nerilso Bocchi, Sonia R. Biaggio |
| Institutions | Universidade Federal de São Carlos |
| Citations | 9 |
Abstract
Section titled “Abstract”The electrodegradation of the Acid Yellow 49 dye (100 mg L-1 in 0.1 mol L-1 Na2SO4) was investigated using boron-doped diamond (BDD), Ti-Pt/β-PbO2, and Ti/RuO2-TiO2 (DSA®) anodes. Galvanostatic electrolyses (5, 15 or 30 mA cm-2) were carried out in an electrochemical flow system, with a filter-press reactor. Best performances were attained with the BDD anode and worst with the DSA® anode. The dye solution was adequately decolorized using an electrical charge per unit volume of dye solution (Qapl) slightly higher than 0.60 A h L-1, applied with the BDD anode at a current density of only 5 mA cm-2. At this current density, COD and TOC abatements of 37% and 20% were attained with Qapl values of only 0.60 and 1.20 A h L-1, respectively; this indicates the feasibility of abating the organic load of the dye solution by simply increasing the value of Qapl.