Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2018
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| _version_ | 1876471674095796224 |
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| author | Luis F. Garay-Rodríguez |
| author_facet | Luis F. Garay-Rodríguez |
| contents | Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway Luis F. Garay-Rodríguez Brenda Zermeño Karla Alejandra López de la O Elisa Leyva Edgar Moctezuma Ingeniería LH HW model Kinetics Bisphenol A Photocatalysis 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. 2018 artículo científico 1665-6423 https://www.redalyc.org/articulo.oa?id=47471639004 https://www.redalyc.org/journal/474/47471639004/ https://www.redalyc.org/journal/474/47471639004/html/ https://www.redalyc.org/journal/474/47471639004/47471639004.epub https://www.redalyc.org/journal/474/47471639004/movil 10.22201/icat.16656423.2018.16.5.737 en http://www.redalyc.org/revista.oa?id=474 Journal of Applied Research and Technology application/pdf Universidad Nacional Autónoma de México Journal of Applied Research and Technology (México) Num.5 Vol.16 |
| format | Artículo científico |
| id | redalyc_47471639004 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway Luis F. Garay-Rodríguez Ingeniería LH HW model Kinetics Bisphenol A Photocatalysis Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway Luis F. Garay-Rodríguez Brenda Zermeño Karla Alejandra López de la O Elisa Leyva Edgar Moctezuma Ingeniería LH HW model Kinetics Bisphenol A Photocatalysis 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. 2018 artículo científico 1665-6423 https://www.redalyc.org/articulo.oa?id=47471639004 https://www.redalyc.org/journal/474/47471639004/ https://www.redalyc.org/journal/474/47471639004/html/ https://www.redalyc.org/journal/474/47471639004/47471639004.epub https://www.redalyc.org/journal/474/47471639004/movil 10.22201/icat.16656423.2018.16.5.737 en http://www.redalyc.org/revista.oa?id=474 Journal of Applied Research and Technology application/pdf Universidad Nacional Autónoma de México Journal of Applied Research and Technology (México) Num.5 Vol.16 |
| title | Photocatalytic degradation of Bisphenol A: Kinetic studies and determination of the reaction pathway |
| topic | Ingeniería LH HW model Kinetics Bisphenol A Photocatalysis |
| url | https://www.redalyc.org/articulo.oa?id=47471639004 https://www.redalyc.org/journal/474/47471639004/ https://www.redalyc.org/journal/474/47471639004/html/ https://www.redalyc.org/journal/474/47471639004/47471639004.epub https://www.redalyc.org/journal/474/47471639004/movil |