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Environmentally, H 2 O 2 is a friendly oxidant. It is used in the current work to oxidize and decolorize two of the direct dyes that fulfill an outstanding demand. These dyes are C. I. Direct Green 28 (14155), I, and C. I. Direct Blue 78 (34200), II. This work may help in solving some of the environmental problems that are faced during the treatment of the wastewater stream of textile...
The kinetics of oxidation of the direct dye Durazol Blue 8G with H 2 O 2 was studied spectrophotometrically in different media. An induction period was observed at the early stages of the reaction. The slowness of the oxidation reaction was a precursor of an autocatalytic behaviour. The absorbance A=f(t) curve has a sigmoid character with a point of inflection which is typical of autocatalytic...
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