F Emami - Department of Environmental Research, Institute for Color Science and Technology, Tehran-Iran
A.R Tehrani-Bagha - Department of Environmental Research, Institute for Color Science and Technology, Tehran-Iran
K Gharanjig - Department of Organic Colorants, Institute for Color Science and Technology, Tehran-Iran

The aim of this study is to provide fundamental knowledge for the treatment of wastewater containing a non-biodegradable reactive dye (C.I. Reactive Blue 19) and/or other anthraquinon dyes by Fenton oxidation process. As an advanced oxidation method, Fenton’s reagent has an advantage that it combines both oxidation and coagulation techniques. The influence of the main operating parameters such as iron sulfate and hydrogen peroxide doses, solution pH, temperature, initial dye concentration and presence different concentrations of sodium chloride and sodium sulfate have been studied systematically in a laboratory scale. The obtained results showed that the best pH value for decolorization of dye solution was 3. An increase in temperature resulted in higher removal rates. Results showed that chloride and sulfate ions had a negative impact on the decolorization of RB19 by Fenton oxidation. The increase of Fe2+ and H2O2 doses accelerated the color and COD removals until a point where further addition of Fe2+ or H2O2 became inefficient and unnecessary

Reactive dye, Advanced oxidation, Fenton reagent, Color Removal, COD removal