Abstract
The 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 cm-2 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, ClO-, 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 •OH radicals as well as HClO and ClO- species that favor the degradation of organic matter. The results are discussed on the light of existing literature.
| Original language | English (US) |
|---|---|
| Pages (from-to) | E62-E69 |
| Journal | Journal of the Electrochemical Society |
| Volume | 163 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 2016 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Materials Chemistry
- Electrochemistry
Cite this
Indirect electrochemical oxidation of reactive blue 19 dye as a model organic substrate : Role of anode material and oxidants electrochemically generated. / Do Nascimento Brito, Chrystiane; Da Silva, Djalma Ribeiro; GARCIA SEGURA, Sergio; De Moura, Dayanne Chianca; Martínez-Huitle, Carlos A.
In: Journal of the Electrochemical Society, Vol. 163, No. 3, 01.01.2016, p. E62-E69.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Indirect electrochemical oxidation of reactive blue 19 dye as a model organic substrate
T2 - Role of anode material and oxidants electrochemically generated
AU - Do Nascimento Brito, Chrystiane
AU - Da Silva, Djalma Ribeiro
AU - GARCIA SEGURA, Sergio
AU - De Moura, Dayanne Chianca
AU - Martínez-Huitle, Carlos A.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - The 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 cm-2 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, ClO-, 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 •OH radicals as well as HClO and ClO- species that favor the degradation of organic matter. The results are discussed on the light of existing literature.
AB - The 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 cm-2 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, ClO-, 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 •OH radicals as well as HClO and ClO- species that favor the degradation of organic matter. The results are discussed on the light of existing literature.
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U2 - 10.1149/2.0191603jes
DO - 10.1149/2.0191603jes
M3 - Article
VL - 163
SP - E62-E69
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 3
ER -