I. Poulios, E. Micropoulou, R. Panou
Mar 31, 2003
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Quality indicators
Journal
Applied Catalysis B-environmental
Abstract
Abstract The photocatalytic degradation of eosin Y, an anionic xanthene fluorescent dye, has been investigated in aqueous heterogeneous solutions containing TiO 2 P-25 and ZnO as photocatalysts. The disappearance of the organic molecule follows approximately a pseudo-first kinetic order according to the Langmuir–Hinshelwood model. The effect of H 2 O 2 on the reaction rate is ascertained. CO 2 and Br − ions have been identified as mineralization products, while toxicity experiments showed a 85% reduction of the toxicity of an eosin Y solution after 60 min of photocatalytic treatment. The initial photonic efficiency ( ζ ) of decolorization, as well as mineralization under various experimental conditions have been calculated.