DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION | ||||
| Al-Azhar Bulletin of Science | ||||
| Article 16, Volume 22, Issue 1-A, June 2011, Page 235-250 PDF (337.17 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/absb.2011.7165 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| MOHAMED S. THABET* | ||||
| Department of Chemistry, Faculty of Science, Al-Azhar University, Cairo, Egypt. | ||||
| Abstract | ||||
| Vanadium modified zeolite was synthesized using the chemical liquid deposition (CLD) and wet exchange methods refer by V/ZCLD, V/Zwet . The obtained materials were calcined at 550°C and characterized using XRD, FTIR, and nitrogen adsorption. The characterized materials were applied for the photo-decolorization of direct violet-4 (DVO-4) as a member of azo dye family, in aqueous medium using hydrogen peroxide and/or UV irradiation (254 nm). The effects of time and catalyst concentration on the decolorization of DVO-4 dye were investigated. The decolorization of (DVO-4) dye and the decreasing in concentration of the dye have been followed using UV–vis spectrophotometry. Results showed that the addition of V/ZCLD, V/Zwet and H2O2 to the dye solution enhanced the rate of degradation. The decolorization followed the pseudo first order kinetics model and a significant mineralization of (DVO-4) was observed. | ||||
| Keywords | ||||
| photocatalysis; Direct Violet; azo dye; Decolorization; Vanadium; MFI zeolite | ||||
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