Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: Process optimization and kinetics

Sudarjanto, G., Keller-Lehmann, B. and Keller, J. (2004). Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: Process optimization and kinetics. In: International Ultraviolet Association, 2nd Asia Conference on UV technologies for Environmental Applications '04 & Original Papers (No. 1 & 2 combined). 2nd Asia Conference on UV technologies for Environmental Applications '04, Tokyo, Japan, (60-66). 4-6 October 2004. doi:10.2965/jwet.2005.1


Author Sudarjanto, G.
Keller-Lehmann, B.
Keller, J.
Title of paper Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: Process optimization and kinetics
Formatted title
Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology : Process optimization and kinetics
Conference name 2nd Asia Conference on UV technologies for Environmental Applications '04
Conference location Tokyo, Japan
Conference dates 4-6 October 2004
Proceedings title 2nd Asia Conference on UV technologies for Environmental Applications '04 & Original Papers (No. 1 & 2 combined)
Journal name Journal of Water and Environment Technology
Place of Publication Tokyo, Japan
Publisher International Ultraviolet Association
Publication Year 2004
Sub-type Fully published paper
DOI 10.2965/jwet.2005.1
Open Access Status DOI
ISSN 1348-2165
0913-8277
Editor International Ultraviolet Association
Volume 3
Issue 1
Start page 60
End page 66
Total pages 7
Collection year 2004
Language eng
Formatted Abstract/Summary
The homogeneous advanced oxidation process of UV/H2O2 was utilized to decolourize CI Reactive Red 195A (RR195A) as one of the most used dyes in the textile industry in Queensland. The UV radiation source was a low-pressure mercury arc lamp (60W emitting at 253.7nm). In this study, the effects of initial hydrogen peroxide (H2O2) dosage, dye concentration, pH and temperature were examined to find out the optimum operating conditions of the treatment process. Complete decolourization was achieved in the relatively short time of 20-30 minutes irradiation. Faster decolourization was achieved at low pH and high temperature. The removal rate increased with increasing initial concentration of H2O2 up to an optimum value. The decolourization reaction was found to follow at least initially first order kinetics with respect to the dye concentration. However, even after near complete removal of the active dye from the solution, approximately 60% of the COD was still remaining, indicating only partial breakdown of the dye molecule. In general, the result indicates that the UV/H2O2 technology proved to have good potential for removing dyestuff from wastewater but further treatment might be necessary to achieve complete mineralization of the organic intermediates.
Subjects EX
279999 Biological Sciences not elsewhere classified
779999 Other
0699 Other Biological Sciences
0905 Civil Engineering
Keyword Photooxidation
Azo-dye
Reactive azo-dye
Decolourization
Textile
UV/H2O2 technology
Q-Index Code EX

 
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Created: Thu, 23 Aug 2007, 19:48:34 EST