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Journal of the Mexican Chemical Society

Print version ISSN 1870-249X

J. Mex. Chem. Soc vol.51 n.2 México Apr./Jun. 2007

 

Article

 

Kinetics of the Degradation of 1,4-Dioxane Using Persulfate

 

Rosa María Félix-Navarro, Shui Wai Lin-Ho, N. Barrera-Díaz and Sergio Pérez-Sicairos

 

Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana A.P. 1166, C.P. 22000, Tijuana, Baja California México. Tel (664) 623 3772, Fax (664) 623 4043 e-mail: rmfelix@tectijuana.mx

 

Recibido el 21 de julio de 2006
Aceptado el 19 de enero de 2007

 

Abstract

The kinetics of oxidation of 1,4-dioxane by persulfate ions in aqueous media was investigated at different temperature, oxidant concentration and pH. Experimental results indicated that 1,4-dioxane degradation follows a pseudo-first-order decay model. Under the experimental conditions the reaction has an activation energy of 21.0 kcal/mol. Temperature and persulfate concentration significantly accelerate the 1,4 dioxane degradation, however, increasing pH (over the range of 3-11) decreased the rate.

Keywords: 1,4-dioxane, persulfate, degradation, kinetics.

 

Resumen

Se investigo la cinética de oxidación de 1,4-dioxano con iones persulfato en medio acuoso a diferente temperatura, concentración del oxidante y pH. Los resultados experimentales indican que la degradación de 1,4-dioxano sigue una cinética de pseudo-primer-orden. La energía de activación de la reacción es de 21.0 kcal/mol bajo las condiciones experimentales. Tanto la temperatura como la concentración de persulfato aceleran significativamente la degradación de 1,4 dioxano, sin embargo, incrementando el pH (3-11) disminuye la velocidad.

Palabras clave: 1,4-dioxano, persulfato, degradación, cinética.

 

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Acknowledgements

The authors thank Consejo Nacional de Ciencia y Tecnología CONACYT of Mexico (SEP-2004-C01-47959) for financial support for this investigation.

 

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