Decomposition Treatment of Dyes Solution Using Direct Contact of Gas Corona Discharge.

Experiments were conducted to decompose three dyes, rhodamine B, methylene blue and erythrosine, in water using a reactor with a gas corona discharge. In this reactor, the gas corona discharge was contacted with the treated water to supply short-lived radicals and ions directly to the water surface, resulting in the production of aqueous reactive species. It was found that these dyes were degraded by this method. Total organic carbon which was not significantly decreased by ozonation without pH control was also decreased by the present method. The decomposed compounds seem to be oxidized to CO2 as final products.