Degradation of a dye, C.I. Reactive Red 120, in dyeing wastewater by the process of UV/H2O2/US was studied with a bench-scale reactor under the continuous mode of operation. The effects of dyeing wastewater flow rate and the feeding rate of an oxidant, H2O2, on the color removal efficiency of the process were investigated. The significance of ultrasonic (US) combined with UV irradiation was also investigated and the performances of the process on color removal were evaluated. The results showed that the decoloration process followed a pseudo first-order kinetic model and the UV light is the most significant factor on dye removal. Besides, at higher flow rates, incomplete color removal was observed due to relatively insufficient irradiation time (low degradation rate). In order to achieve a higher degradation rate, the feeding rate of H2O2 should be increased.
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Research Article|
September 01 2001
Degradation kinetics of reactive dye by UV/H2O2/US process under continuous mode operation Available to Purchase
P. C. Fung;
P. C. Fung
*
1Research Centre for Urban Environmental Technology and Management, Department of Civil and Structural Engineering,The Hong Kong Polytechnic University, Hong Kong
*Corresponding author. Fax: (852) 2334 6389; E-mail: [email protected]
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C. S. Poon;
C. S. Poon
1Research Centre for Urban Environmental Technology and Management, Department of Civil and Structural Engineering,The Hong Kong Polytechnic University, Hong Kong
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C. W. Chu;
C. W. Chu
1Research Centre for Urban Environmental Technology and Management, Department of Civil and Structural Engineering,The Hong Kong Polytechnic University, Hong Kong
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S. M. Tsui
S. M. Tsui
1Research Centre for Urban Environmental Technology and Management, Department of Civil and Structural Engineering,The Hong Kong Polytechnic University, Hong Kong
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Water Sci Technol (2001) 44 (6): 67–72.
Citation
P. C. Fung, C. S. Poon, C. W. Chu, S. M. Tsui; Degradation kinetics of reactive dye by UV/H2O2/US process under continuous mode operation. Water Sci Technol 1 September 2001; 44 (6): 67–72. doi: https://doi.org/10.2166/wst.2001.0343
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