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<p><strong>Silver(I) catalyzed oxidation kinetics of the crystal violet dye by peroxydisulfate in aqueous and micellar media</strong></p>

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Title Statement <p><strong>Silver(I) catalyzed oxidation kinetics of the crystal violet dye by peroxydisulfate in aqueous and micellar media</strong></p>
 
Added Entry - Uncontrolled Name Hameed, Salem A; King Abdulaziz University
Hameed, Salem A; Chemistry Department, Faculty of Science, King Abdulaziz University, P.O Box 80203, 21589 Jeddah, Saudi Arabia
Ewais, Hassan A; Chemistry Department, Faculty of Science, King Abdulaziz University, P.O Box 80203, 21589 Jeddah, Saudi Arabia
Deanship of Scientific Research (DSR) at King Abdulaziz University
 
Uncontrolled Index Term Crystal violet, Catalysis by silver(I), Oxidative decolcorization, Outer-sphere mechanism, Pseudo phase model
 
Summary, etc. <p>The<strong> </strong>kinetics of the oxidative decolcorization of crystal violet (CV<sup>+</sup>) as a cationic dye by peroxydisulfate using silver(I) catalyst in aqueous acidic medium were studied. The effects of different parameters like hydrogen ion, silver(I), reactants concentration, micelles and temperatures were investigated. The reaction between [CV]<sup>+</sup> and persulfate was investigated under pseudo-first-order kinetics by taking a large excess of [S<sub>2</sub>O<sub>8</sub><sup>2-</sup>]<sup> </sup>over [CV<sup>+</sup>]. A plausible mechanism for the silver(I) enhanced decolcorization of [CV]<sup>+ </sup>by persulfate is suggested and rate law obeyed the following equation: <strong> </strong></p> <p>Rate = (<em>k</em><sub>2 </sub> +     <em>k</em><sub>3</sub>[Ag<sup>+</sup>])  [CV<sup>+</sup>] [S<sub>2</sub>O<sub>8</sub><sup>2-</sup>]</p> <p>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. Heats of activation D<em>H</em>* and D<em>S</em>* were calculated. An outer-sphere process for the electron transfer is the proposed mechanism for this reaction.</p> <p><strong><em> </em></strong></p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2021-09-22 11:25:14
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJCA/article/view/47639
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 60, ##issue.no## 8 (2021): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/47639/465554328
 
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