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E-Journal of Chemistry
Volume 8, Issue 2, Pages 903-909
http://dx.doi.org/10.1155/2011/267894

Kinetics and Mechanism of Oxidation of Diethanolamine and Triethanolamine by Potassium Ferrate

Shan Jinhuan and Zhang Jiying

College of Chemistry and Environmental Science Hebei University, Baoding 071002, China

Received 18 May 2010; Accepted 23 July 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The kinetics of oxidation of diethanolamine and triethanolamine by potassium ferrate(VI) in alkaline liquids at a constant ionic strength has been studied spectrophotometrically in the temperature range of 278.2 K-293.2 K. The reaction shows first order dependence on potassium ferrate(VI), first order dependence on each reductant, The observed rate constant (kobs) decreases with the increase in [OH-], the reaction is negative fraction order with respect to [OH-]. A plausible mechanism is proposed and the rate equations derived from the mechanism can explain all the experimental results. The rate constants of the rate-determining step and the thermodynamic activation parameters are calculated.