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Issue		Eur. Phys. J. AP Volume 4, Number 2, November 1998
Page(s)		171 - 179
DOI		10.1051/epjap:1998258

DOI: 10.1051/epjap:1998258

Eur. Phys. J. AP 4, 171-179

Plasma treatment of aqueous solutes: Some chemical properties of a gliding arc in humid air

B. Benstaali¹ - D. Moussa^{2, 3} - A. Addou¹ - J.-L. Brisset³

¹ Département de Chimie, Université de Mostaganem, Chemin des Crêtes, Mostaganem, Algéria
² STMI, 1 rue de la Noue, 91196 Gif-sur-Yvette, France
³ Laboratoire d'Électrochimie, UFR des Sciences, Université de Rouen, 76821 Mont-Saint-Aignan Cedex, France

Received: 7 April 1998 / Revised: 7 July 1998 / Accepted: 8 July 1998

Abstract
The chemical properties of the gaseous species generated in a humid air gliding arc discharge are investigated. Aqueous solutions are used as the targets exposed to the plasma, and this allows to evidence strong acid and oxidizing effects on various solutes by means of spectrometric or potentiometric methods. The influence of some working parameters such as the input gas flow, the distance from the electrodes to the target or the electrode gap is examined on the chemical transform and simple experimental laws are derived. A general feature is observed for oxidation and suggests the occurrence of an auto-catalytic step in the relevant kinetic mechanism.

PACS
82.40.Ra Plasma reactions - 52.40.w Plasma interactions - 52.80.Mg Arcs; sparks; lightning

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