Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Similars in SciELO
Share
Portugaliae Electrochimica Acta
Print version ISSN 0872-1904
Abstract
AYOUB, Z.A. and EL JAMAL, M.M.. Effect of Operating Parameters on Electrochemical Discoloration of Acid Blue 1 on BDD Electrode. Port. Electrochim. Acta [online]. 2017, vol.35, n.2, pp.81-90. ISSN 0872-1904. https://doi.org/10.4152/pea.201702081.
The degradation of the AB1 dye by electro-generated species using a BDD electrode was performed. The results were explained by the generation of OH* radical, S2O82- in the presence of sulfate, and active halide species in the presence of halide salt. The discoloration rate increases in this order: sulfate, KCl, KBr. In the presence of KCl, the discoloration is affected by the current density, initial pH, temperature, and concentration of the supporting electrolyte; however, the concentration of the dye and the ionic strength showed a negligible effect. The intermediates produced during the discoloration are a function of the pH of the solution. In the presence of sulfate, the discoloration rate is very slow, and the mechanism of discoloration is different from that in the presence of KCl. The thermodynamic parameters of the discoloration are calculated.
Keywords : BDD electrode; Acid Blue 1; discoloration; kinetic; strong electrolyte.