This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Photocatalytic Oxidation of Selected Organic Contaminants in a Continuous Flow Reactor Packed with Titania-Doped Silica
Technical Paper
2004-01-2403
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A prototype reactor was designed and tested to oxidize synthetic organic chemicals (SOCs) without the use of expendable chemicals and without the need to separate the catalyst from the water after treatment. An annular continuous flow reactor with a nominal volume of 400 mL was packed with silica gel pellets that were doped with titania (TiO2) (12 wt%). The reactor was configured in a test stand with UV lamps in the center of the reactor. SOC oxidation experiments were performed in a recycle mode and in a single-pass mode. Five target analytes (acetone, chlorobenzene, ethyl acetate, toluene, and methylmethacrylate) were spiked (100 to 300 μg/L) into nano-pure water and recycled through the reactor until adsorption equilibrium was attained. UV lamps, which were shielded, were then uncovered, and effluent concentrations were monitored as a function of time. All of the compounds were degraded to below detection limit (5 μg/L) after an extended reaction period of 23 hours. Oxidation was found to be a function of empty bed contact time, and first order rate constants for the photocatalytic degradation of three of the contaminants were determined.
Recommended Content
Authors
- Frederick R. Holmes
- Paul A. Chadik - University of Florida, Environmental Engineering Sciences
- David W. Mazyck - University of Florida, Environmental Engineering Sciences
- Chang-Yu Wu - University of Florida, Environmental Engineering Sciences
- M. Joanne Garton - University of Florida, Environmental Engineering Sciences
- Kevin W. Powers
- Danielle J. Londeree
Citation
Holmes, F., Chadik, P., Mazyck, D., Wu, C. et al., "Photocatalytic Oxidation of Selected Organic Contaminants in a Continuous Flow Reactor Packed with Titania-Doped Silica," SAE Technical Paper 2004-01-2403, 2004, https://doi.org/10.4271/2004-01-2403.Also In
References
- Al-Ekabi, H. Serpone, N. 1989 Kinetic Studies in Heterogeneous Photocatalysis 2. TiO 2 -Mediated Degradation of 4-Chlorophenol Alone and in a Three-Component Mixture of 4-Chlorophenol, 2,4-Dichlorophenol, and 2,4,5 Trichlorophenol, in Air-Equilibrated Aqueous Media 5 250
- Blake, D. M. 1999 Bibliography of Work on the Heterogeneous Photocatalytic Removal of Hazardous Compounds from Water and Air National Renewable Energy Laboratory
- Chen, P.H. Jenq, C.H. 1998 Kinetics of Photocatalytic oxidation of Trace Organic Compounds over titanium Dioxide Environment International 8 871
- Gao, X. Wachs, I. 1999 Titania-Silica as Catalysts: Molecular Structural Characteristics and Physico-Chemical Properties Catalysis Today 51 233
- Kawaguchi, H. Furuya, M. 1990 Photodegradation of Monochlorobenzene in Titanium Dioxide Aqueous Suspensions Chemosphere 21 1435
- Lange, K. E. Lin, C. H. 1998 Advanced Life Support Program: Requirements Definition and Design Considerations
- Matthews, R. W. 1991 Photooxidative Degradation of Colored Organics in Water Using Supported Catalyst TiO 2 on Sand Water Resources 25 1169
- Powers, K. 1998 The Development and Characterization of sol Gel Substrates for Chemical and Optical Applications University of Florida
- Turchi, C. S. Ollis, D. F. 1990 Photocatalytic Degradation of Organic-Water Contaminants-Mechanisms Involving Hydroxyl Radical Attack Journal of Catalysis 122 178
- USEPA 1992 Methods for the Determination of Organic Compounds in Drinking Water
- Vidal, A. 1998 Developments in Solar Photocatalysis for Water Purification Chemosphere 36 2593