[16a-B13-1~11] 8.7 Plasma phenomena, emerging area of plasmas and their new applications

[16a-B13-4] Evaluation of hydroxyl radicals produced by discharges inside bubble in water with organic dye

Ryosuke Konno¹, 〇Katsuyuki Takahashi¹, Koichi Takaki¹, Naoya Satta¹ (1.Iwate University)

Keywords:discharge inside bubble, hydroxyl radical, water remediation

Amount of hydroxyl radicals produced by discharge inside bubble in water was evaluated with decomposition of organic compunds. The experiments were conducted based on decolorization of indigo carmine and production of hydrogen peroxide in chloride ion solution. Amount of the decolorization of indigo carmine was saturated at 1.5×10^-6 mol when indigo carmine concentration was higher than 2.5 mM. The cocentration of hydrogen peroxide produced by discharges decreased with increasing concentration of the chloride ion. These reuslts show that the hydroxyl radicals produced by one discharge was obtained as 1.4×10^-11 ~ 1.6×10^-11 mol contribute to react with solutes in this experimental condition.