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A combination of ultrasound and inorganic catalyst: removal of 2-chlorophenol from aqueous solution
- Source :
- Ultrasonics sonochemistry. 12(1-2)
- Publication Year :
- 2004
-
Abstract
- Removal of 2-chlorophenol by ultrasonic waves (sonolysis), inorganic catalyst, and a combination of the two processes was tested and compared with each technique. In sonolysis, 2-chlorophenol mostly degraded indirectly in the bulk of solution by the radicals produced in the cavitation process. In catalyst treatment, the removal was performed in the presence of Al2O3, TiO2 and CuO. The highest removal was achieved in the presence of TiO2 for this pollutant. In the combined method an enhancement was observed for the removal of 2-chlorophenol. This could be attributed primarily to the continuous cleaning and chemical activation of the catalyst by acoustic cavitation. The mass transfer between the liquid phase and the catalyst and also the surface area of the catalyst are accelerated by the ultrasonic waves. The removal of 2-chlorophenol was performed under different intensities of irradiation, temperatures and quantities of catalyst. Some experiments were conducted in the presence of a Fenton reagent. In kinetic point of view, the removal of pollutant showed a pseudo-first order behavior. The combined method had a higher rate coefficient than sonolysis and catalyst treatment individually. Under some conditions, the presence of ultrasound has increased the rate coefficient of removal to about 10 times that in the absence of ultrasound.
- Subjects :
- Acoustics and Ultrasonics
Sonication
Iron
Inorganic chemistry
Radiation Dosage
Sonochemistry
Catalysis
Water Purification
Inorganic Chemistry
chemistry.chemical_compound
Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology, Nuclear Medicine and imaging
Hydrogen peroxide
Chlorophenol
Aqueous solution
Organic Chemistry
Temperature
Dose-Response Relationship, Radiation
Hydrogen Peroxide
Solutions
chemistry
2-Chlorophenol
Inorganic Chemicals
Hydroxyl radical
Water Pollutants, Chemical
Chlorophenols
Subjects
Details
- ISSN :
- 13504177
- Volume :
- 12
- Issue :
- 1-2
- Database :
- OpenAIRE
- Journal :
- Ultrasonics sonochemistry
- Accession number :
- edsair.doi.dedup.....d157ee66229fabe9af2b349ed2591d84