OPTIMIZATION OF PHOTOCATALYTIC DECOLORIZATION OF THE AZO DYE DIRECT ORANGE 34 BY STATISTICAL EXPERIMENTAL DESIGN
The photodecolorization of the azo dye Direct Orange 34 (DO34) was investigated in TiO2 aqueous suspensions with artificial irradiation at 30°C. The experimental conditions were optimized by a 2(5) factorial design, using the decolorization percentage after 240 min irradiation as the response. The f...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Chile |
| Institución: | CONICYT Chile |
| Repositorio: | SciELO Chile |
| OAI Identifier: | oai:scielo:S0717-97072010000300009 |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000300009 |
| Access Level: | acceso abierto |
| Palabra clave: | photocatalytic decolorization Direct Orange 34 TiO2 oxidant factorial design |
| Sumario: | The photodecolorization of the azo dye Direct Orange 34 (DO34) was investigated in TiO2 aqueous suspensions with artificial irradiation at 30°C. The experimental conditions were optimized by a 2(5) factorial design, using the decolorization percentage after 240 min irradiation as the response. The five factors considered were DO34 and TiO2 concentrations, stirring speed, air saturation, and adsorption time. The addition of hydrogen peroxide and sodium periodate as oxidants increased the decolorization rate. |
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