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Title: Silver(I) catalyzed oxidation kinetics of the crystal violet dye by peroxydisulphate in aqueous and micellar media
Authors: Hameed, Salem A
Ewais, Hassan A
Keywords: Crystal violet, Catalysis by silver(I);Oxidative decolcourisation;Outer-sphere mechanism;Pseudo phase model
Issue Date: Aug-2021
Publisher: NIScPR-CSIR, India
Abstract: 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.
Page(s): 1064-1071
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.60A(08) [August 2021]

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