Kinetics of the sonophotocatalytic degradation of orange G in presence of Fe3 +

摘要

The degradation and mineralization of orange G (OG) in aqueous solution by means ofnultrasound irradiation at a frequency of 213 kHz and its combination with Fe3+ wereninvestigated. The effect of Fe3+ concentration on the degradation efficiency was studied.nThe degradation of the dye followed first-order like kinetics under the conditions examined.nA comparison study on the hybrid technique of sonophotocatalytic degradation in the presencenof Fe3+ (SonoFenton) with the individual techniques of photocatalysis and sonolysis was alsonperformed. A slight synergistic enhancement in the degradation of the dye was observed duringnthe sonophotocatalytic oxidation of OG using Fe3+. The total organic carbon (TOC)nmeasurements, carried out in order to evaluate the mineralization efficiency of OG usingnsonolysis, photocatalysis and sonophotocatalysis, showed a synergetic effect of combiningnsonolysis and photolysis.