title: Pathways and kinetics on photocatalytic destruction of aqueous phenol.
abstract: In this study, the TiO2 photocatalytic decomposition process of aqueous phenol was investigated. The intermediate products generated in the elementary reaction steps in the mineralization process were experimentally identified as hydroquinone, catechol and hydroxyhydroquinone. The concentration variations of these intermediate products with time passage were traced by high performance liquid chromatograph. The pathways of the decomposition process were given. Based on Langmuir isothermal theory and Langmuir-Hinshelwood mechanism, the multi-compounds competition kinetic model was established. In this model, the observed time-dependent concentrations of phenol and the intermediate products were simulated.
authors.affiliation: Department of Chemical Engineering, University of Waterloo, Faculty of Engineering, Waterloo, Ontario, Canada. L4zhang@engmail.uwaterloo.ca
authors.forename: Lianfeng
authors.initials: L
authors.lastname: Zhang
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Kanki
authors.forename: Noriaki
authors.initials: N
authors.lastname: Sano
authors.forename: Atsushi
authors.initials: A
authors.lastname: Toyoda
mesh_terms: D002384:Catalysis; D002851:Chromatography, High Pressure Liquid; D052918:Environmental Restoration and Remediation; D007700:Kinetics; D008956:Models, Chemical; D019800:Phenol / Q000032:analysis*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D019800:Phenol; D014025:Titanium