SciELO - Scientific Electronic Library Online

 
vol.54 número3Spectroscopic Determination of Optimal Hydration Time of Zircon SurfaceSynthesis of Peptides Histamine H2 Receptors in Solid-Phase Assisted by Microwave índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Journal of the Mexican Chemical Society

versión impresa ISSN 1870-249X

Resumen

GONZALEZ-JUAREZ, Julio César; JIMENEZ-BECERRIL, Jaime  y  CEJUDO-ALVAREZ, Jesús. Degradation of 4-Chlorophenol by Gamma Radiation of 137Cs and X-rays. J. Mex. Chem. Soc [online]. 2010, vol.54, n.3, pp. 157-159. ISSN 1870-249X.

This paper presents results of radiolytic degradation of 4-chlorophenol in the presence of TiO2, Al2O3, y SiO2, using different radiation sources than 60Co, which is so common in this type of experiment. The radiation sources used were X-rays with energy of 100 keV and radiation from 137Cs (662 keV). After irradiation with a dose of 50 cGy X-ray and TiO2 obtained a degradation of about 5%, no degradation was obtained with 137Cs source and other oxides. This may be due to the fact that X-rays have a linear energy transfer (LET) greater value, and in the case of TiO2 present a crystalline structure, whereas the other two oxides are amorphous. Both characteristics result in better formation of a reactive species that allows the degradation of the compound.

Palabras llave : Radiocatalysis; Photocatalysis; Radiation Induced Catalysis; 4-Chlorophenol.

        · resumen en Español     · texto en Inglés     · pdf en Inglés