Journal
DYES AND PIGMENTS
Volume 69, Issue 1-2, Pages 74-78Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2005.02.009
Keywords
Methyl Red; Fenton's reagent; dye degradation; decolourization; textile waste; hydrogen peroxide
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Waste effluents from textile industries are a major source of water pollution. These waste streams contain numerous toxic dyes, which are resistant to natural breakdown and degradation. Therefore, there is a need to find economical and bio-friendly methods to degrade textile dyes. In this study, degradation of Methyl Red, an azo dye, was studied using the ferrous-hydrogen peroxide system. The oxidation and subsequent degradation of the dye was found to be dependent on both the amount of Fe2+ ions as well as hydrogen peroxide. In order to study the effect of other salts that are normally present in textile waste streams, a systematic study was carried out using 10 different salt solutions. Some of the ions tested enhanced the rate and extent of degradation of the dye, whereas some had an inhibitory effect. The rates of degradation were found to fit to first-order kinetics. (c) 2005 Elsevier Ltd. All rights reserved.
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