THABET, MOHAMED S. (2011) 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, 22 (1). pp. 235-250. ISSN 1110-2535
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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.
Item Type: | Article |
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Subjects: | Journal Eprints > Medical Science |
Depositing User: | Managing Editor |
Date Deposited: | 07 Oct 2023 09:37 |
Last Modified: | 07 Oct 2023 09:37 |
URI: | http://repository.journal4submission.com/id/eprint/2485 |