Catalyst Effect on Degradation of Organism by Nanoseconds Pulsed Discharge in Gas-Liquid Mixture

Abstract

The gas-liquid mixed phase plasma generated by a streamer discharge in bubbles was used for degradation of acetic acid as treatment of organism pollution in water. The synergistic effect of plasma and catalyst, TiO 2 or Fe ions via electro-Fenton process, was utilized to enhance the production and utilization of hydroxyl radicals. When TiO 2 powder was added to acetic acid solution, the hydrogen peroxide (H 2 O 2 ) concentration formed by the combination of OH radicals significantly increased more than 25%. Whereas, when a grounded electrode was replaced to Fe, iron ions appears in the solution and H 2 O 2 was fully resolved into OH radicals in the electroFenton process, resulting in the degradation of acetic acid. The energy efficiency of degradation of acetic acid increased from 0.78 g/kWh to 1.18 g/kWh and 1.31 g/kWh with the addition of TiO 2 and replacement of iron electrode, respectively.

Degradation of Acetic Acid in Water Using Gas-Liquid Plasma with SPG Membrane

“…A nanosecond pulsed high voltage which is conducive to the non-thermal plasma generation was employed to produce a non-thermal plasma in this organic degradation reactor [13]. The schematic diagram of a pulse highvoltage circuit is shown in Fig.…”