Kinetics of tartrazine photodegradation by UV/H2O2 in aqueous solution

In the present work, kinetics of tartrazine decay by UV irradiation and H 2 O 2 photolysis, and the removal of total organic carbon (TOC) under specific experimental conditions was explored. Irradiation experiments were carried out using a photoreactor of original design with a low-pressure Hg vapou...

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Bibliographic Details
Published in:Chemical papers 2014, Vol.68 (1), p.105-111
Main Authors: Oancea, Petruta, Meltzer, Viorica
Format: Article
Language:English
Subjects:
advanced oxidation process (AOP)
Biochemistry
Biotechnology
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
dyes
Industrial Chemistry/Chemical Engineering
Materials Science
Medicinal Chemistry
Original Paper
photodegradation
tartrazine
water treatment
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Summary:In the present work, kinetics of tartrazine decay by UV irradiation and H 2 O 2 photolysis, and the removal of total organic carbon (TOC) under specific experimental conditions was explored. Irradiation experiments were carried out using a photoreactor of original design with a low-pressure Hg vapour lamp. The photodegradation rate of tartrazine was optimised with respect to the H 2 O 2 concentration and temperature for the constant dye concentration of 1.035 × 10 −5 M. Tartrazine degradation and the removal of TOC followed the pseudo-first-order kinetics. The much higher k obs value for tartrazine degradation (7.91 × 10 −4 s −1 ) as compared with the TOC removal (2.3 × 10 −4 s −1 ) confirmed the presence of reaction intermediates in the solution.
ISSN:0366-6352
1336-9075
1336-9075
DOI:10.2478/s11696-013-0426-5