Comparative Electrochemical Degradation of the Acid Yellow 49 Dye Using Boron-Doped Diamond, beta-PbO2, and DSA (R) Anodes in a Flow Reactor

Autor(es)

Waechter, Naihara ^[1] ; Pereira, Gabriel Fontes ^[1] ; Rocha-Filho, Romeu C. ^[1] ; Bocchi, Nerilso ^[1] ; Biaggio, Sonia R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Electrochemical Science; v. 10, n. 2, p. 1361-1371, FEB 2015.
• Citações Web of Science: 6

Resumo

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/beta-PbO2, and Ti/RuO2-TiO2 (DSA (R)) 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 (R) anode. The dye solution was adequately decolorized using an electrical charge per unit volume of dye solution (Q(apl)) 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 Q(apl) 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 Q(apl). (AU)

• Processo FAPESP: 12/13002-9 - Degradação eletroquímica de um fármaco: comparação entre anodos
• Beneficiário: Naihara Wachter
• Modalidade de apoio: Bolsas no Brasil - Mestrado