Kinetics of oxidation of uranium(IV) by permanganate ion in aqueous perchlorate media

“…The temperature was controlled within ±0.10°C. The preparation and analysis of the stock solutions of reagents and the procedure of the kinetic measurements were the same as described elsewhere 6–8.…”

Section: Methodsmentioning

confidence: 99%

Kinetics and mechanism of decomposition of intermediate complex during oxidation of pectate polysaccharide by potassium permanganate in alkaline solutions

Khairou

2002

Int J of Chemical Kinetics

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The kinetics of decomposition of an [Pect·Mn VI O 4 2− ] intermediate complex have been investigated spectrophotometrically at various temperatures of 15-30 • C and a constant ionic strength of 0.1 mol dm −3 . The decomposition reaction was found to be first-order in the intermediate concentration. The results showed that the rate of reaction was basecatalyzed. The kinetic parameters have been evaluated and found to be S = = −190.06 ± 9.84 J mol −1 K −1 , H = = 19.75 ± 0.57 kJ mol −1 , and G = = 76.39 ± 3.50 kJ mol −1 , respectively. A reaction mechanism consistent with the results is discussed.

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“…Similarly, addition of [F − ] ions should retard the oxidation rates . On the other hand, if the rate constant decreases with increasing addition of Mn(II) to the reaction mixture, it means that the permanganate ion is the more reactive species …”

Section: Resultsmentioning

confidence: 99%

Kinetics and mechanistic aspects on electron‐transfer process for permanganate oxidation of poly(ethylene glycol) in aqueous acidic solutions in the presence and absence of Ru(III) catalyst

Hassan

Sayed

2018

Int J of Chemical Kinetics

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The kinetics and mechanism of oxidation of poly(ethylene glycol) (PEG) by the permanganate ion as a multiequivalent oxidant in aqueous perchlorate solutions at an ionic strength of 2.0 mol dm−3 has been investigated spectrophotometrically. The reaction kinetics was found to be of complex in nature. The pseudo–first‐order plots showed curves of inverted S‐shape, consisting of two distinct stages throughout the entire course of reaction. The first stage was relatively slow, followed by a fast reaction rate at longer time periods. The first‐order dependence in [MnO4−], fractional first‐order dependence in [H+], and fractional first‐order kinetics in the PEG concentration for the first stage have been revealed in the absence of the Ru(III) catalyst. The influence of the Ru(III) catalyst on the oxidation kinetics has been examined. The oxidation was found to be catalyzed by the added Ru(III) catalyst. The First‐order dependence on the catalyst and zero order with respect to the oxidant concentrations have been observed. The kinetic parameters have been evaluated, and a tentative reaction mechanism consistent with the kinetic results is suggested and discussed.

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Kinetics of oxidation of uranium(IV) by permanganate ion in aqueous perchlorate media

Cited by 31 publications

References 4 publications

Novel Carboxymethyl Cellulose Ionotropic Gels

Novel Carboxymethyl Cellulose Ionotropic Gels

Kinetics and mechanism of decomposition of intermediate complex during oxidation of pectate polysaccharide by potassium permanganate in alkaline solutions

Kinetics and mechanistic aspects on electron‐transfer process for permanganate oxidation of poly(ethylene glycol) in aqueous acidic solutions in the presence and absence of Ru(III) catalyst

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