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International Journal of Photoenergy
Volume 5 (2003), Issue 2, Pages 87-93

Kinetics of atrazine degradation by photocatalytic process in aqueous solution

Département de Chimie Physique des Réactions - UMR 7630 CNRS-INPL ENSIC, 1 rue Grandville, BP 451, Nancy Cedex F-54001, France

Copyright © 2003 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.


The photocatalytic degradation of the herbicide atrazine has been studied using suspended titanium dioxide as catalyst. The Langmuir-Hinshelwood model is satisfactorily obeyed at initial time and in the course of the reaction. The rate of degradation is found to be enhanced by the addition of persulphate ions. Competitive degradation between atrazine and other pollutants is satisfactorily interpreted as monitored by a competitive adsorption of the reactants. As a consequence, efficient reactants such as salicylic acid and phenol delay atrazine degradation until these compounds are degraded.