Photocatalytic destruction of organic dyes in aqueous TiO sub 2 suspensions using concentrated simulated and natural solar energy
- Abilene Christian Univ., TX (United States)
- Pepperdine Univ., Malibu, CA (United States)
The photocatalytic destruction of several classes of organic dyes utilizing highly concentrated solar energy is reported. Several commercial samples of anatase TiO{sub 2} varying in particle size and purity were studied to determine catalytic activity with Degussa P25 grade being the most active. When immobilized on glass beads it remained highly active. The rate and extent of decomposition of the organic compounds were determined by UV/Vis spectroscopy and High Performance Liquid Chromatography (HPLC). Complete mineralization was confirmed by total organic carbon analysis as well as quantitative measurements of CO{sub 2} and various inorganic ions. In general, sulfur in the organic compounds is converted to sulfate ions and nitrogen is converted to ammonium and/or nitrate ions. The effect of increasing the flux of the radiation on the rate of decomposition of the dye was also studied. There is a dramatic rate increase as the flux is increase from 15 suns' (solar simulator) to 150 suns' (solar dish concentrator) with the increase being slightly greater than the square root of the increase in flux. This work suggests that potential exists for the use of highly concentrated sunlight in the removal of the textile dyes and biological stains from wastewater.
- OSTI ID:
- 5118114
- Journal Information:
- Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Vol. 48:6; ISSN 0038-092X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rapid microwave hydrothermal synthesis of ZnGa{sub 2}O{sub 4} with high photocatalytic activity toward aromatic compounds in air and dyes in liquid water
Solar detoxification of nitroglycerine-contaminated water using immobilized Titania
Related Subjects
54 ENVIRONMENTAL SCIENCES
DYES
PHOTOLYSIS
TITANIUM OXIDES
CATALYTIC EFFECTS
CARBON DIOXIDE
LIQUID COLUMN CHROMATOGRAPHY
ORGANIC COMPOUNDS
SOLAR CONCENTRATORS
WASTE PROCESSING
WASTE WATER
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMATOGRAPHY
DECOMPOSITION
EQUIPMENT
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PROCESSING
SEPARATION PROCESSES
SOLAR EQUIPMENT
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTES
WATER
140909* - Solar Thermal Utilization- Miscellaneous Solar Applications- (1980-)
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)