Kinetics of the sonophotocatalytic degradation of orange G in presence of Fe(3+).
The degradation and mineralization of orange G (OG) in aqueous solution by means of ultrasound irradiation at a frequency of 213 kHz and its combination with Fe(3+) were investigated. The effect of Fe(3+) concentration on the degradation efficiency was studied. The degradation of the dye followed first-order like kinetics under the conditions examined. A comparison study on the hybrid technique of sonophotocatalytic degradation in the presence of Fe(3+) (SonoFenton) with the individual techniques of photocatalysis and sonolysis was also performed. A slight synergistic enhancement in the degradation of the dye was observed during the sonophotocatalytic oxidation of OG using Fe(3+). The total organic carbon (TOC) measurements, carried out in order to evaluate the mineralization efficiency of OG using sonolysis, photocatalysis and sonophotocatalysis, showed a synergetic effect of combining sonolysis and photolysis.
School of Chemistry, Particulate Fluids Processing Centre, University of Melbourne, Parkville Victoria, Australia.
Jagannathan
J
Madhavan
Franz
F
Grieser
Muthupandian
M
Ashokkumar
D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects*; D002384:Catalysis / Q000528:radiation effects; D002851:Chromatography, High Pressure Liquid; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration / Q000528:radiation effects; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008027:Light; D008903:Minerals / Q000737:chemistry; D010084:Oxidation-Reduction / Q000528:radiation effects; D010100:Oxygen / Q000302:isolation & purification; D010782:Photolysis / Q000528:radiation effects; D013997:Time Factors; D014465:Ultrasonics
D001391:Azo Compounds; D008903:Minerals; C008710:Orange G; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen