Hydrogen Peroxide Formation at Plasma-water Interface under Positive Dc Streamer and Pulsed Corona Discharge

Plasma-induced advanced oxidation processes (AOPs) have been widely investigated [1, 2] due to its ability to generate reactive species such as H2O2 and OH radicals [3]. A pin-towater electrode system was employed to investigate the reaction mechanisms at the plasma-water interface, with water used as the ground electrode under both static and flowing conditions. The formation of H2O2 in water was quantified by the spectrophotometric method, using potassium titanium (IV) oxalate. Tert-butanol was used as an OH radical scavenger, to stop the dimerization of OH radicals into H2O2.