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IJC-A Vol.48A(10) [October 2009] >

Title: Artificial light assisted photocatalytic degradation of lissamine fast yellow dye in ZnO suspension in a slurry batch reactor
Authors: Pare, Brijesh
Singh, Pardeep
Jonnalgadda, S B
Keywords: Photocatalysis
Azo dyes
Zinc oxide
Issue Date: Oct-2009
Publisher: CSIR
IPC CodeInt. Cl.9 B01J23/06; C09B27/00
Abstract: The photocatalytic degradation of lissamine fast yellow has been carried out in the aqueous suspension of ZnO under artificial light. The effects of process parameters such as catalyst loading, H2O2, FeCl3, etc., on the extent of degradation have been studied. The influence of pH, bubbling of N2 and O2 and temperature on degradation of the dye has also been studied. ZnO degrades the dye effectively in the presence of both artificial and solar light. The pH has a significant effect on reaction rate. H2O2, O2, and FeCl3 have a synergetic effect on degradation of the dye. The rate constant has an optimal value at 35°C. N2 has a detrimental effect on dye degradation. Both Fe3+/ZnO/AR and H2O2/Fe3+/ZnO/AR processes have been found to be effective for the decolorisation of dye. However, the H2O2/Fe3+/ZnO/AR process is more efficient for the decolorisation of the selected dye. Increased COD-removal percentage, significant release of NO3- and SO42- ions and UV-vis spectral analysis confirm mineralization of the selected dye in aqueous phase. Power law has been applied to find the net rate of degradation.
Page(s): 1364-1369
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Source:IJC-A Vol.48A(10) [October 2009]

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