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A model for the decomposition of azure-B by photo-Fenton reagent in presence of ultrasound in homogeneous aqueous solution has been described. The photochemical decomposition rate of azure-B is markedly increased in the presence of ultrasound. It is a rather inexpensive reagent for wastewater treatment. The effect of different variables like the concentration of ferric ion, concentration of dye, hydrogen peroxide, pH, light intensity etc. on the reaction rate has been observed. The progress of the sono-photochemical degradation was monitored spectrophotometrically. The optimum sono-photochemical degradation conditions were experimentally determined. The results showed that the dye was completely oxidized and degraded into CO2 and H2O. A suitable tentative mechanism for sono-photochemical bleaching of azure-B by sono-photo-Fenton’s reaction has been proposed.
| Authors: | Prahlad Vaishnave, Anil Kumar, Rakshit Ameta, P.B. Punjabi, Suresh C. Ameta | |
| Journal: | Arabian Journal of Chemistry | |
| Year: | 2012 | |
| DOI: | 10.1016/j.arabjc.2010.12.019 | |
| Publication date: | 23-04-2012 |
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