Evaluation of different electrochemical methods on the oxidation and degradation of Reactive Blue 4 in aqueous solution
| Autor: | Maysa Furlan, Nivaldo Boralle, Marly E. Osugi, Cecilio Sadao Fugivara, Patricia A. Carneiro, Maria Valnice Boldrin Zanoni |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Antimony
Environmental Engineering Health Toxicology and Mutagenesis Inorganic chemistry chemistry.chemical_element Electrochemistry Electrocatalyst law.invention chemistry.chemical_compound law Environmental Chemistry Reactive dye Electrodes Electrolytic process Titanium Electrolysis Aqueous solution Sulfates Triazines Public Health Environmental and Occupational Health Tin Compounds Water Oxides General Medicine General Chemistry Pollution chemistry Photocatalysis Oxidation-Reduction Carbon |
| Zdroj: | Chemosphere. 59:431-439 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2004.10.043 |
| Popis: | The oxidation of a reactive dye, Reactive Blue 4, RB4, (C.I. 61205), widely used in the textile industries to color natural fibers, was studied by electrochemical techniques. The oxidation on glassy carbon electrode and reticulated vitreous carbon electrode occurs in only one step at 2.0 < pH < 12 involving a two-electron transfer to the amine group leading to the imide derivative. Dye solution was not decolorized effectively in this electrolysis process. Nevertheless, the oxidation of this dye on Ti/SnO2/SbO(x) (3% mol)/RuO2 (1% mol) electrode showed 100% of decolorization and 60% of total organic carbon removal in Na2SO4 0.2 M at pH 2.2 and potential of +2.4V. Experiments on degradation photoelectrocatalytic were also carried out for RB4 degradation in Na2SO4 0.1 M, pH 12, using a Ti/TiO2 photoanode biased at +1.0 V and UV light. After 1h of electrolysis the results indicated total color removal and 37% of mineralization. |
| Databáze: | OpenAIRE |
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