Title: Decolourisation of dye solution using an electrical discharge with TiO2 suspension

Authors: Hidetoshi Sekiguchi, Krittiya Pornmai

Addresses: Department of Chemical Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan. ' Department of Chemical Engineering, Thammasat University, Rangsit campus, Klong Luang, Phatumtani 12120, Thailand

Abstract: An electrical discharge in water with TiO2 suspension has been applied for the decolourisation of methyl orange as a model of dye. The results showed the decolourisation was successful in the reactor. The increase in the flow rate of gas injection enhanced the decolourisation rate. Oxygen injection had a stronger influence when compared with Ar injection. The suspension of TiO2 improved the decolourisation. The results suggested the plasma-assisted three-phase reactor had a promising possibility to treat various kinds of wastewater.

Keywords: dye decolourisation; electrical discharge; three-phase reactors; titanium dioxide; methyl orange; hydroxy radical; wastewater treatment; gas injection; flow rate.

DOI: 10.1504/IJEWM.2008.021778

International Journal of Environment and Waste Management, 2008 Vol.2 No.4/5, pp.329 - 335

Published online: 04 Dec 2008 *

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