INVESTIGADORES
SHAM Edgardo Ling
artículos
Título:
KINETIC STUDIES OF THE PHOTOCATALYTIC DEGRADATION OF TARTRAZINE
Autor/es:
GRACIELA V. MORALES; E. L. SHAM; ROSARIO CORNEJO; E. M FARFAN TORRES
Revista:
LATIN AMERICAN APPLIED RESEARCH
Editorial:
PLAPIQUI(UNS-CONICET)
Referencias:
Lugar: Bahia Blanca; Año: 2010
ISSN:
0327-0793
Resumen:
Kinetic studies of the photocatalytic  degradation of tartrazine are carried out in a batch stirred reactor built in quartz at laboratory scale using  TiO2 as catalyst and irradiating the photoreactor with ultraviolet light. An experimental design is performed  using as independent variables or factors the catalyst concentration, the calcination temperature of the catalyst and the initial concentration of tartrazine. The obtained kinetic model indicates that the  value of the kinetic constant, k, for a first order reaction is high, in the operating conditions studied. This is consistent with the low value of the adsorption constant, K. The experimental data fitted, with the Langmuir-Hinshelwood model, lead to an equation that, in the range of concentrations studied, allows  the evaluation of photodegradation and describes well the photoreactivity results.2 as catalyst and irradiating the photoreactor with ultraviolet light. An experimental design is performed  using as independent variables or factors the catalyst concentration, the calcination temperature of the catalyst and the initial concentration of tartrazine. The obtained kinetic model indicates that the  value of the kinetic constant, k, for a first order reaction is high, in the operating conditions studied. This is consistent with the low value of the adsorption constant, K. The experimental data fitted, with the Langmuir-Hinshelwood model, lead to an equation that, in the range of concentrations studied, allows  the evaluation of photodegradation and describes well the photoreactivity results.