Journal
DYES AND PIGMENTS
Volume 74, Issue 2, Pages 458-463Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2006.03.006
Keywords
Sunset Yellow; Ponceau 4R; peroxydisulphate; catalysis; kinetics
Ask authors/readers for more resources
The kinetics and mechanism of the oxidation of Sunset Yellow (E-110, C.I. 15985), SY, and Ponceau 4R (E-124, C.I. 16255), PR, monoazo dyes with peroxydisulphate have been investigated. The oxidation reaction of SY and PR was very slow and followed a zero-order kinetics for 02-j [dye] and a first-order kinetics for [S2O82-]. The reaction showed an activation energy of 102.3 kJ/mol and 96.2 kJ/mol for SY and PR, respectively. The rate of the Ag(I)-catalyzed oxidation reaction was higher with an activation energy of 46 kJ/mol and 45 kJ/mol for SY and PR, respectively. The activation parameters, Delta H#, Delta G# and Delta S# were also deduced. A reaction mechanism was proposed for the oxidation reaction of SY and PR in the absence and in the presence of Ag(l). (c) 2006 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available