Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46340
Title: Highly concentrated phenolic wastewater treatment by heterogeneous and homogeneous photocatalysis: Mechanism study by FTIR-ATR
Authors: Araña, J. 
Tello-Rendón, E. 
Doña-Rodríguez, J. M. 
Valdés Do Campo, C.
Herrera-Melidán, J. A. 
González-Díz, O. 
Pérez-Peña, J. 
UNESCO Clasification: 330301 Tecnología de la catálisis
Keywords: FTIR
High phenol concentrations
Photocatalysis
Photodegradation
TiO2 reuse
Issue Date: 2001
Publisher: 0273-1223
Journal: Water Science and Technology 
Conference: 2nd International Conference on Oxidation Technologies for Water and Wastewater Treatment 
Abstract: The degradation of high phenol concentrations (1 g/L) in water solutions by TiO2 photocatalysis and the photo-Fenton reaction has been studied. From the obtained data it may be suggested that degradation of phenol by TiO2-UV takes place onto the catalyst surface by means of peroxo-compounds formation. At low phenol concentrations other mechanism, the insertion of OH. radicals, may be favored. On the other hand, highly concentrated phenol aqueous solutions treatment by the photo-Fenton reaction gives rise to the formation of polyphenolic polymers. These seem to reduce the process rate. Degradation intermediates have been identified by HPLC and FTIR. The FTIR study of the catalyst surface has shown infrared bands attributable to different chemisorbed peroxo-compounds, formates, ortho-formates and carboxylates that can inactivate the catalyst.
URI: http://hdl.handle.net/10553/46340
ISSN: 0273-1223
Source: Water Science and Technology [ISSN 0273-1223], v. 44, p. 229-236
Appears in Collections:Actas de congresos
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