Characterizations of a Plasma-Water System Generated by Repetitive Microsecond Pulsed Discharge with Air, Nitrogen, Oxygen, and Argon Gases Species

A non-thermal plasma-water system using a microsecond pulsed high-voltage power supply was investigated with air, nitrogen, oxygen, and argon gas feedings individually. Optical emission spectroscopy (OES) utilized to characterize the primary active species inside plasmas generated by different feedings. The OES method also employed estimate neutral electron temperatures. pH oxidation-reduction potential (ORP) of plasma-activated water (PAW) were measured in liquid phase. An ion chromatography (ICS) present PAW activity, such as nitrite nitrate species. Moreover, hydrogen peroxide secondary activated water, gases mentioned above, potassium permanganate titration. It found that have noticeable effect on level well ORP PAW. In cases oxygen plasmas, does not change significantly. contrast, values air nitrogen decline sharply during treatment time. significant impact concentrations nitrite, nitrate, plasma provides highest peroxide. Although consumed half other sources, it relatively high contents compared plasmas.