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Decoloration of Azo Dye by Electrodeless Discharge in Water

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Abstract:

The decoloration of azo dye (Methyl Orange, MO) by a electrodeless discharge was analyzed. The discharge was generated under and above the pinhole(s) of the insulating plate, which was used to separate the electrodes. The effects of hydroxyl radical scavenger (sodium carbonate) and TiO2 on MO decoloration were studied. The results show that the decoloration rate of MO can be decreased by adding the carbonate ions to the solution, but it will be increased by adding the TiO2. The UV-Vis and FTIR spectras show that the azo bond (-N=N-) of the MO is broken up by corona discharge, and the phenyl-rings is further opened to form small molecular compounds such as organic acid.

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Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

678-681

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.678

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Online since:

January 2013

Authors:

Li Zhang, Bing Sun

Keywords:

Active Species, AZO Dye, Electrodeless Discharge, Pinhole

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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