[Table of Contents]

Plasma and Fusion Research

Volume 10, 3406022 (2015)

Regular Articles

Catalyst Effect on Degradation of Organism by Nanoseconds Pulsed Discharge in Gas-Liquid Mixture
Guanyang TANG, Ryosuke OHNO, Atsushi KOMURO, Kazunori TAKAHASHI and Akira ANDO
Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan
(Received 25 November 2014 / Accepted 6 February 2015 / Published 19 March 2015)

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, TiO2 or Fe ions via electro-Fenton process, was utilized to enhance the production and utilization of hydroxyl radicals. When TiO2 powder was added to acetic acid solution, the hydrogen peroxide (H2O2) 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 H2O2 was fully resolved into OH radicals in the electro-Fenton 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 TiO2 and replacement of iron electrode, respectively.

Keywords

gas-liquid plasma, degradation of acetic acid, TiO2, electro-Fenton process, pulsed high voltage, catalyst

DOI: 10.1585/pfr.10.3406022

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This paper may be cited as follows:

Guanyang TANG, Ryosuke OHNO, Atsushi KOMURO, Kazunori TAKAHASHI and Akira ANDO, Plasma Fusion Res. 10, 3406022 (2015).