Kinetic and Mechanistic Study of the Reduction of Chromium(VI) by Lactic Acid | Zendy

Jinhuan Shan | Zendy; Fang Wang | Zendy; Changying Song | Zendy; Wang He-ye | Zendy

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Kinetic and Mechanistic Study of the Reduction of Chromium(VI) by Lactic Acid

Author(s) -

Jinhuan Shan,

Fang Wang,

Changying Song,

Wang He-ye

Publication year - 2008

Publication title -

international journal of inorganic chemistry

Language(s) - English

Resource type - Journals

eISSN - 2090-2026

pISSN - 2090-2034

DOI - 10.1155/2008/314045

Subject(s) - font , chromium , analytical chemistry (journal) , matrix (chemical analysis) , chemistry , mathematics , nuclear chemistry , chromatography , organic chemistry , computer science , artificial intelligence

The kinetics and mechanism of the reduction of chromium(VI) by lactic acid (Lac) in aqueous acidic medium was studied with spectrophotometry in a temperature range of 298.15 K~313.15 K. Under the conditions of the pseudo-first order ([Lac]0Ã¢Â‰Â«[Cr(VI)]0), the observed rate constant (kobs) increased with the increase in [Lac] and [H+]. There is no salt effect. Based on the experimental results, a probable reaction mechanism of oxidation was proposed. The rate equation derived from the mechanism could explain all the experimental phenomena. Activation parameters along with rate constant of the rate-determining step have been evaluated

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