Combinative Sonolysis and Photocatalysis for Textile Dye Degradation

The merits of combining two advanced oxidation processes, viz., sonolysis and photocatalysis, have been evaluated by investigating the degradation of an azo dye, naphthol blue black (NBB), using a high-frequency ultrasonic generator and UV−photolysis. An additive effect on the degradation rate of th...

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Bibliographic Details
Published in:Environmental science & technology 2000-05, Vol.34 (9), p.1747-1750
Main Authors: Stock, Naomi L, Peller, Julie, Vinodgopal, K, Kamat, Prashant V
Format: Article
Language:English
Subjects:
Additives
azo compounds
AZO DYES
Biodegradable materials
CATALYSIS
Catalysts
Dyes
ENVIRONMENTAL SCIENCES
Experiments
HYDROXYL RADICALS
naphthol blue black dye
ORGANIC COMPOUNDS
OXIDATION
Photocatalysis
PHOTOLYSIS
REMEDIAL ACTION
Textiles
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Summary:The merits of combining two advanced oxidation processes, viz., sonolysis and photocatalysis, have been evaluated by investigating the degradation of an azo dye, naphthol blue black (NBB), using a high-frequency ultrasonic generator and UV−photolysis. An additive effect on the degradation rate of the parent compound is observed when the sonolysis and photocatalysis experi ments were carried out in a simultaneous or sequential manner. Sonolysis is effective for inducing faster degradation of the parent dye, while TiO2 photocatalysis is effective for promoting mineralization.
ISSN:0013-936X
1520-5851
DOI:10.1021/es991231c