The formation of reactive oxygen species in advanced oxidation induced by cold atmospheric plasma technology

Advanced oxidation induced by cold plasma under the high voltage electrical barrier discharge exhibits a wide use in practice due to be able to produce very high concentrations of reactive oxygen species with short and long life. The reactive oxygen species generated include free radicals (•OH) and other oxidative reagents like ozone, hydrogen peroxide. The quantification of these oxidative components is truly imperative to application in wastewater treatment to design plasma reactors. The concentrations of these species might be determined by many methods. The identification and analysis of these reactive oxygen species were successfully carried out by colorimetric method using the competition reaction of hydroxyl free radicals with ethanol (ETA) and trinitrophenol (TNP); using titanium (IV) as reagent for the quantification of H2O2 and HI 38054 test KIT for analyzing ozone and using iodometric method determining total reactive oxygen species. All experimental data were presented in this article.