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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
Series/Report no.: Int. Cl.<sup>9</sup> 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, H<sub>2</sub>O<sub>2</sub>, FeCl<sub>3</sub>, etc., on the extent of degradation have been studied<b style="">. </b>The influence of <i style="">p</i>H, bubbling of N<sub>2</sub> and O<sub>2</sub> and temperature on degradation of the dye has also been studied<b style="">. </b>ZnO degrades the dye effectively in the presence of both artificial and solar light. The <i style="">p</i>H has a significant effect on reaction rate. H<sub>2</sub>O<sub>2</sub>, O<sub>2</sub>, and FeCl<sub>3</sub> have a synergetic effect on degradation of the dye. The rate constant has an optimal value at 35°C. N<sub>2</sub> has a detrimental effect on dye degradation. Both Fe<sup>3+</sup>/ZnO/AR and H<sub>2</sub>O<sub>2</sub>/Fe<sup>3+</sup>/ZnO/AR processes have been found to be effective for the decolorisation of dye. However, the H<sub>2</sub>O<sub>2</sub>/Fe<sup>3+</sup>/ZnO/AR process is more efficient for the decolorisation of the selected dye. Increased COD-removal percentage, significant release of NO<sub>3</sub><sup>-</sup> and SO<sub>4</sub><sup>2-</sup> 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.
Description: 1364-1369
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Appears in Collections:IJC-A Vol.48A(10) [October 2009]

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