Kinetics Study on the Removal of p-Nitrophenol by UV/S2O82- Process in an Annular Continuous-Flow Photoreactor

Document Type : Research Article


Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, I.R. IRAN


In this work an annular continuous-flow photoreactor with a UV-C lamp (λmax = 254 nm) in the center of photoreactor has been used in the removal of p-nitrophenol by UV/S2O82- process. For the first time a kinetic model has been proposed for UV/S2O82- process. The rate constant of the interaction of SO4-• radicals with the p-nitrophenol molecules has been estimated through the adoption of kinetics model (1.1 ×105 M-1s-1). This model allows predicting the concentration of p-nitrophenol in different photoreactor lengths for different flow rates and initial concentrations of oxidant.


Main Subjects

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