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Kinetics of TiO2/Polyurethane Films for Degradation of Organic Pollutants in Water
Abstract:
In this paper,TiO2 was prepared by the sol-gel Method,which has high activity and oxidation abilities .The polyurethane is famous for its transmittance and film forming properties,we use polyurethane and titanium dioxide to produce TiO2/polyurethane films. In this paper, phenolic wastewater was considered as the research object,Discussed photocatalytic properties and photocatalytic reaction kinetics model of TiO2/polyurethane film at 253.7nm UV irradiation.The results show that degradation rate of phenolic wastewater approached to 14.6mg.L-1.h-1.m2-1 when Ti02 dosage of 60 mg/L,reaction time of 240 min,Phenolic wastewater initial concentration of 10mg/L and pH5.0.The dosage of TiO2,wastewater initial concentration and pH have significant influence on apparent first-order rate constants of photocatalytic degradation,Reaction kinetics of photocatalytic degradation to phenolic wastewater accordances with the quasi-one grade equation of Langmuir-Hinshelwood.
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1560-1564
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Online since:
December 2012
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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