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The sonochemical decolorisation of textile azo dye CI Reactive Orange 127
Author(s) -
Özdemir Celalettin,
Öden Muhammed K,
Şahinkaya Serkan,
Güçlü Dünyamin
Publication year - 2011
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2011.00310.x
Subject(s) - hydrogen peroxide , chemistry , sonication , ferrous , sonochemistry , methyl orange , wastewater , nuclear chemistry , advanced oxidation process , chromatography , catalysis , waste management , organic chemistry , photocatalysis , engineering
In the present study, Fenton and sono‐Fenton processes were applied to the oxidative decolorisation of synthetic textile wastewater including CI Reactive Orange 127 and polyvinyl alcohol. Process optimisation [pH, ferrous ion (Fe 2+ ) and hydrogen peroxide (H 2 O 2 )], kinetic studies and their comparison were carried out for both of the processes. The sono‐Fenton process was performed by indirect sonication in an ultrasonic water bath, which was operated at a fixed 35‐kHz frequency and 80 W power. The optimum conditions were determined as [Fe 2+ ] = 20 mg l −1 , [H 2 O 2 ] = 15 mg l −1 and pH = 3 for the Fenton process and [Fe 2+ ] = 25 mg l −1 , [H 2 O 2 ] = 5 mg l −1 and pH = 3 for the sono‐Fenton process. The colour removals were 89.9% and 91.8% by the Fenton and sono‐Fenton processes, respectively. The highest decolorisation was achieved by the sono‐Fenton process because of the production of some oxidising agents as a result of sonication. Consequently, ultrasonic irradiation in the sono‐Fenton process slightly increased the colour removal to 91.8%, while decreasing the hydrogen peroxide dosage to one‐third of that of the Fenton process.