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Morteza Montazerozohori,Masoud Nasr-Esfahani,Zohreh Moradi-shammi,Ameneh Malekhoseini 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
In this research, photocatalytic decolorization and its kinetics study of auramine dye at various aqueousbuffer and non-buffer media using nano-titanium dioxide in two different sizes of 15 and 70 nm in aphotocatalyic reactor under 400W high pressure mercury lamp irradiation under aerobic condition isdescribed. The effects of some physico-chemical parameters such as photocatalyst dosage, medium pHand irradiation time were investigated in the presence of two different nano-photocatalysts and then theresults were compared with each other. Kinetics study of photocatalytic treatment of auramine dyeresulted that the dye decolorization approximately follows a pseudo-first order kinetic behavioraccording to the Langmuir–Hinshelwood model. Ultimately, the observed rate constants, experimentalhalf-times, adsorption constants and decolorization rate constants at surface at buffer and non-buffermedia under aerobic conditions were evaluated.