✦ LIBER ✦

A kinetic approach for the mechanism of malachite green-peroxydisulphate reaction in aqueous solution

✍ Scribed by T. Mushinga; S. B. Jonnalagadda

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 416 KB
Volume: 24
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550240106

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✦ Synopsis

The oxidation kinetics of malachite green (MG) with peroxydisulphate ion (PDS) were investigated by monitoring the absorbance change at 618 nm, in aqueous solutions under buffered and unbuffered conditions. Under both conditions, the reaction had first order dependence on reductant and a fractionah&order (one half) dependence on the oxidant. The stoichiometric ratio between MG and PDS was 1:2. The reaction had a negative salt effect. Reaction rates were enhanced under both high or low pH relative to neutral conditions. A plausible mechanism is proposed.

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