DECOMPOSITION OF BRILLIANT BLUE FCF IN WATER BY PULSED POWER DISCHARGE IN A WATER DROPLETS SPRAY

摘要

This paper presents the results of comparison of three water treatment methods for decomposition of dye in water by pulsed power discharge. These methods are gas phase discharge in a water droplets spray and ozone oxidation in water and a water droplets spray. We intend to investigate the effect of water droplets and OH radical in water treatment by gas phase discharge in a space spraying water droplets. Brilliant blue FCF solution was used as dye in the treatment. The decolorization rate of the treatment by spraying water droplets into the gas phase discharge reached 90% at 5 minutes. The decolorization time of the treatment by spraying water droplets into atmosphere of ozone concentration of 250 and 100 ppm took 20 and 25 minutes to reach the decolorization rate of 90 and 85%, respectively. These results show that other radicals including OH radical and excluding ozone mainly contribute to decompose brilliant blue FCF in the former treatment. The decolorization rate of the treatment by injecting ozone of concentration of 100 ppm into the water solution was 0% in time elapse of 25 minutes. The result shows that spraying water droplets into reacting fields in the water treatment gets faster decolorization time.