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