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Silver(I) catalyzed oxidation kinetics of the crystal violet dye by peroxydisulphate in aqueous and micellar media

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Title Silver(I) catalyzed oxidation kinetics of the crystal violet dye by peroxydisulphate in aqueous and micellar media
 
Creator Hameed, Salem A
Ewais, Hassan A
 
Subject Crystal violet, Catalysis by silver(I)
Oxidative decolcourisation
Outer-sphere mechanism
Pseudo phase model
 
Description 1064-1071
The kinetics of the oxidative decolcourisation of crystal violet (CV+) as a cationic dye by peroxydisulphate using
silver(I) catalyst in aqueous acidic medium has been studied. The effects of different parameters like hydrogen ion, silver(I),
reactants concentration, micelles and temperatures are investigated. The reaction between [CV]+ and persulphate is
investigated under pseudo-first-order kinetics by taking a large excess of [S2O8
2-] over [CV+]. The effect of surfactant
micelles such as SDS and Triton X-100 on the reaction rate is investigated. The rate of reaction decreases with increasing
[SDS] but had no effect with Triton X-100. Heat and entropy of activation and are calculated. An outer-sphere process for
the electron transfer is the proposed mechanism for this reaction.
 
Date 2021-08-23T10:50:09Z
2021-08-23T10:50:09Z
2021-08
 
Type Article
 
Identifier 0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/57927
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJC-A Vol.60A(08) [August 2021]