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Updated: Aug 11, 2026

Light-driven Enzymatic Decarboxylation
Published on: May 22, 2016
Decolorization and degradation of H-acid and other dyes using ferrous-hydrogen peroxide system
K Swaminathan1, S Sandhya, A Carmalin Sophia
1National Environmental Engineering Research Institute (NEERI), CSIR Complex, Chennai 600113, India. kanchana74in@yahoo.co.in
Abstract:
In this study, advanced oxidation process utilizing Fenton's reaction was investigated for the decolorization and degradation of two commercial dyes viz., Red M5B, Blue MR and H-acid, a dye intermediate used in chemical industries for the synthesis of direct, reactive and azo dyes. Effect of Fe2 +, H2O2, pH, and contact time on the degradation of the dyes was studied. Maximum color and COD removal was obtained for Red MSB, H-acid and Blue MR at 10-25 mg/l of Fe2+ dose and 400-500 mg/l of H2O2 dose at pH 3.0. The initial oxidation reaction was found to fit into first order rate kinetics and the rate of oxidation of H-acid was higher than the other dyes. Release of chloride and sulfate from the Fenton's treated Red M5B dye and sulfate from H-acid and Blue MR indicates that the dye degradation proceeds through cleavage of the substituent group.
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