Kinetic study of sonocatalytic degradation of Methylene blue by sonofenton process

Document Type : Original Article


Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran


In this work degradation of Methylene blue (MB) was studied by sonofenton process (Fenton reagent+Ultrasound irradiation). The effect of initial concentrations of H2O2, Fe2+ and MB, initial pH of solution and ultrasound power on the degradation rate were investigated. The results show that the degradation rate of MB was increased with increasing the concentration of Fe2+ and MB. The degradation rate was increased with increasing concentration of H2O2 up to 0.0001M but degradation rate was decreased by further increasing the concentration of H2O2. The pH effect was investigated in the range of 2.7–4.6 and the result show that degradation rate of MB was decreased by increasing the pH value. The order of reaction respect to each reactant was determined by initial rate method. The results show that the degradation efficiency of MB was increased with increasing the ultrasound power. The synergistic index was found to be 1.4 for Fenton reagent+Ultrasound irradiation, which reveals that there is a considerable synergistic effect in this coupled system.


Main Subjects

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