Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway

Document title: Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway
Journal: Journal of applied research and technology
System number: 000427629
ISSN: 1665-6423
Authors: 1
Institutions: 1Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, San Nicolás de los Garza, Nuevo León. México
2Universidad Autónoma de San Luis Potosí, Facultad de Ciencias Químicas, San Luis Potosí. México
Season: Oct
Volumen: 16
Number: 5
Country: México
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The photocatalytic degradation of BPA aqueous solutions with commercial TiO2 (Evonik P25) was carried out in a home-made batch reactor illuminated with four UV lamps (λmax=365 nm) in order to determine the kinetic parameters of the reaction rate equation and to identify and quantify some of the most stable aromatic intermediate reaction products. Low concentration (20 ppm) BPA solutions were completely degraded and mineralized in less than three hours of reaction. Whereas, BPA aqueous solutions with concentration above 50 ppm are transformed in other chemical compounds in 6 hours of reaction and fully mineralized in 15 hours of reaction. Kinetic analysis of the experimental results of BPA concentration as a function of time indicated that this photocatalytic degradation process follows a LH-HW reaction rate law where the reaction order shift from zero order to first order as the reactant concentration is decreased. Analysis of the reaction samples by different analytical techniques indicated that BPA is mineralized via formation of hydroquinone, benzoquinone, benzene-triol, catechol, and phenol by two simultaneous reaction pathways
Disciplines: Química
Keyword: Ingeniería química,
Bisfenol A,
Degradación fotocatalítica,
Parámetros cinéticos,
Compuestos fenólicos
Keyword: Chemical engineering,
Photocatalytic degradation,
Bisphenol A,
Kinetic parameters,
Phenolic compounds
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