Photodegradation of reactive yellow 84 AZO-dye in aqueous solution

The photodegradation of the Reactive Yellow 84 (RY 84) azo-dye in ultrapure water is investigated in a laboratory-scale batch photoreactor equipped with an immersed low-pressure mercury lamp as UV source. The kinetic results show that the UV/H 2 O 2 process, with a H 2 O 2 dose of 9.8 mmol/L, is 85...

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Bibliographic Details
Published in:Toxicological and environmental chemistry 2000-11, Vol.78 (1-2), p.31-40
Main Authors: Neamtu, Mariana, Yediler, Ayfer, Siminiceanu, Ilie, Macoveanu, Matei, Kettrup, Antonius
Format: Article
Language:English
Subjects:
kinetics
mineralization
Photoreactor
process
Reactive Yellow 84
UV/H
water treatment
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Summary:The photodegradation of the Reactive Yellow 84 (RY 84) azo-dye in ultrapure water is investigated in a laboratory-scale batch photoreactor equipped with an immersed low-pressure mercury lamp as UV source. The kinetic results show that the UV/H 2 O 2 process, with a H 2 O 2 dose of 9.8 mmol/L, is 85 times faster than the UV process. After 60 minutes of irradiation, with 0.98 mmol/L H 2 O 2 , the decolorization is almost complete whereas the mineralization degree of the organic carbon is of 73.42%. These preliminary results demonstrate that the UV/H 2 O 2 process may be applied as an alternative technique for the textile wastewater treatment. The first-order rate constants determined in this work can be used for the photoreactor scale-up and design.
ISSN:0277-2248
1029-0486
DOI:10.1080/02772240009358958