Comparison of ultraviolet radiation/hydrogen peroxide, Fenton and photo-Fenton processes for the decolorization of reactive dyes

Miljana Radovic,Aleksandar Bojic,Danijela Bojic,Slobodan Najdanovic,Jelena Mitrovic,Milos Kostic,Milica Petrovic

doi:10.2298/hemind140905088r

Abstract

The effectivness of UV/H2O2 process, Fenton and photo-Fenton process at decolorization of commercially important textile dyes Reactive Orange 4 (RO4) and Reactive Blue 19 (RB19) was evaluated. The effect of operational condition such as initial pH, initial H2O2 concentration, initial Fe2+ concentration and initial dye concentration on decolorization of RO4 and RB19 was studied. The photo-Fenton process is found to be more efficient than UV/H2O2 and Fenton process for decolorization of simulated dye bath effluent and solutions of the dyes in water alone under optimum conditions. In simulated dye bath the removal efficiency was slightly lower than for the solutions of the dyes in water alone for both dyes types. The results revealed that the tested advanced oxidation processes were very effective for decolorization of RO4 and RB19 in aqueous solution.

Highlights

The effectiveness of UV/H2O2 process, Fenton and photo-Fenton process on decolorization of commercially important textile dyes Reactive Orange 4 (RO4) and Reactive Blue 19 (RB19) was evaluated
We have investigated the decolorization of azo dye Reactive Orange 4 (RO4) and anthraquinone dye Reactive Blue 19 (RB19) by three different advanced oxidation processes (AOPs)
Based on the results previously shown for the solutions of the dyes in water alone and the results for the simulated dyebath effluent shown in Table 2, it can be concluded that the decolorization efficiency is higher for solutions of the dyes in water alone than for the dyes in a simulated dyebath effluent for both dyes types

Summary

Introduction

The effectiveness of UV/H2O2 process, Fenton and photo-Fenton process on decolorization of commercially important textile dyes Reactive Orange 4 (RO4) and Reactive Blue 19 (RB19) was evaluated. M.D. RADOVIĆ et al.: COMPARISON OF DIFFERENT PROCESSES FOR THE DECOLORIZATION OF REACTIVE DYES For practical use of these processes in wastewater treatment, there is a need to determine the optimal conditions of experimental parameters (pH, initial concentration of dye, H2O2 and Fe2+) for efficient removal.

Results

Conclusion