OPTIMIZATION OF PHOTOCATALYTIC DECOLORIZATION OF THE AZO DYE DIRECT ORANGE 34 BY STATISTICAL EXPERIMENTAL DESIGN

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...

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Veröffentlicht in:Journal of the Chilean Chemical Society 2010, Vol.55 (3), p.320-324
Hauptverfasser: NIEHUES, EDUARDO, SCARMÍNIO, IEDA S, TAKASHIMA, KEIKO
Format: Artikel
Sprache:eng
Schlagworte:
CHEMISTRY, MULTIDISCIPLINARY
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Zusammenfassung: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.
ISSN:0717-9707
0717-9707
DOI:10.4067/S0717-97072010000300009