Photocatalytic degradation of an industrial azo dye C.I Basic Red 46 were examined in a thin film fixed bed photoreactor with external UV light irradiation. Photodecolorization study revealed a pseudo-first-order kinetic, nonlinear regression analysis a model was developed for pseudo-first order rate constant (kapp) as a function of operational parameters such as the initial dye concentration (mg.L-1), Intensity I (w.m-2) and flow rate (L.min-1). The optimization of UV/TiO2 process was carried out using Box-Behnken design approach in order to assess individual and interactive effects of the three main previous independent parameters on the decolorization efficiency Y (%), however, the BR46 concentration and flow rate have an antagonist effect on the photodecolourization efficiency, the highest TOC removal efficiency of 61% mineralization was achieved at optimal parameters conditions (initial dye concentration 32.43 mg/L, UV light intensity 38.1 W/m2, flow rate 0.5 L/min), the intermediates generated during the photocatalytic degradation process of Basic Red 46 were identified using GC-MS analysis.

Photocatalytic degradation of C.I. basic red 46 in thin film fixed bed photoreactor: Non linear regression analysis and intermediates

253rd National Meeting (2017)

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