File(s) under permanent embargo

Reason: This item is currently closed access.

Decolorization of the azo dye Reactive Black 5 by Fenton and photo-Fenton oxidation

journal contribution
posted on 02.12.2015, 16:41 authored by Marco Lucas, Jose A. Peres
The oxidative decolorization of Reactive Black 5 (RB5) in aqueous solution has been studied using Fenton (H2O2/Fe2+) and photo-Fenton (H2O2/Fe2+/UV) processes. This investigation reveals that both methods can remove the color of RB5. Batch experiments were carried out to investigate the process's optimal operational conditions: pH, H2O2 dosage, Fe2+ dosage, RB5 concentration and optimal [Fe2+]0/[H2O2]0/[RB5]0 ratio, to obtain the bests results at low cost, render AOP competitive with other processes. The optimal conditions found were a ratio [H2O2]0/[RB5]0 of 4.9:1, a ratio [H2O2]0/[Fe2+]0 of 9.6:1 and pH = 3.0. The decolorization experiments indicate that RB5 can be effectively decolorized using Fenton and photo-Fenton processes with a little difference between the two processes, 97.5% and 98.1%, respectively, for optimal conditions. This small difference in dye decolorization is not similar to TOC removal: with photo-Fenton process there is a significant increment (46.4% TOC removal) relatively to Fenton process (only 21.6% TOC removal). This fact indicates that although UV low-pressure mercury lamp has little effect on dye decolorization it is particularly important in dye mineralization.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Dyes and Pigments

Volume

71

Issue

3

Pages

236 - 244

Citation

LUCAS, M. and PERES, J., 2006. Decolorization of the azo dye Reactive Black 5 by Fenton and photo-Fenton oxidation. Dyes and Pigments, 71 (3), pp.236-244

Publisher

© Elsevier Ltd.

Version

NA (Not Applicable or Unknown)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2006

Notes

This paper is closed access.

ISSN

0143-7208

Language

en

Usage metrics

Keywords

Exports