Source: Academic Press publisher
Web: http://www.academicjournals.org
The main causes of surface water and groundwatercontamination are industrial discharges. Updating the field of polluted watertreatment by photochemical technique has led to an important in oxidative degradation processes applying solar photochemical methods using crystal TiO2 as acatalyst. Photocatalytic oxidation of methyl orange dye under differentirradiation sources (Halogen lamp 1000 W, fluorescent lamp and natural sunlight ) have been studied over TiO2 catalyst. The effect of initial dyeconcentrations, irradiation time and light intensity were also studied. Theresults revealed that dyes under go fast degradation with the natural sun lightthan the halogen and fluorescent lamp sources. On other hand, fast degradationwas obtained with increasing time of the Halogen and fluorescent lamps as alight source. The rate of decolorization was estimated from residual concentrationspectro- photometrically. At the used experimental conditions the substratephoto-oxidation rate follows pseudo-first order kinetics.
About the Authors:
The authors are associated with Chemistry and PhysicsDepartment, Faculty of Science, Aswan, South Valley University, Egypt, respectively
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