Indirect Electrochemical Oxidation of Reactive Blue 19 Dye as a Model Organic Substrate - Role of Anode Material and Oxidants Electrochemically Generated
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2015-12-10 |
| Journal | Journal of The Electrochemical Society |
| Authors | Chrystiane do Nascimento Brito, Djalma Ribeiro da Silva, Sergi GarciaâSegura, Dayanne Chianca de Moura, Carlos A. MartĂnezâHuitle |
| Institutions | Universidade Federal do Rio Grande do Norte |
| Citations | 34 |
Abstract
Section titled âAbstractâThe indirect electrochemical oxidation (IEO) of Reactive Blue 19 has been studied at boron-doped diamond (BDD) and Ru0.3Ti0.7O2/Ti anodes by applying 25, 50 and 75 mA cmâ2 in presence of NaCl as supporting electrolyte. Results clearly showed that electrochemical degradation of dye was achieved via electrogenerated species (hydroxyl radicals and active chlorine), obtaining higher removal efficiencies of color (100% for both anodes) and organic matter from solution (from 30 up to 60% for Ru0.3Ti0.7O2/Ti and from 65 up to 80% for BDD). In order to understand the key role of oxidants, active chlorine species were also determined, achieving different concentrations of dissolved Cl2, HClO, ClOâ, chlorite, chlorine dioxide and chlorate at both anodes, as a consequence of experimental conditions used as well as the nature of electrode material employed. For BDD, the IEO was more effective due to the effective production of â˘OH radicals as well as HClO and ClOâ species that favor the degradation of organic matter. The results are discussed on the light of existing literature.