Journal article

Degradation of orange-G by advanced oxidation processes

Jagannathan Madhavan, Franz Grieser, Muthupandian Ashokkumar



The degradation and mineralization of orange-G (OG) in aqueous solutions by means of ultrasound irradiation at a frequency of 213kHz and its combination with a heterogeneous photocatalyst (TiO(2)) were investigated. The effects of various operational parameters such as, the concentration of the dye and solution pH on the degradation efficiency were studied. The degradation of the dye followed first-order like kinetics under the conditions examined. The sonolytic degradation of OG was relatively higher at pH 5.8 than that at pH 12. However, an alkaline pH was favoured for the photocatalytic degradation of OG using TiO(2). Total organic carbon (TOC) measurements were also carried out in order ..

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Awarded by DIISR, Australia

Awarded by DST, New Delhi

Funding Acknowledgements

The authors thank DIISR, Australia and DST, New Delhi for the financial support of an India-Australian strategic research fund (INT/AUS/P-1/07 dated 19 September 2007).