[23a-E103-1~10] 8.5 Plasma phenomena, emerging area of plasmas and their new applications

[23a-E103-10] 1,4-Dioxan Decomposition by Air Plasma-Gas Bubbling

〇Hiroyuki Yoshiki¹, Kazuhiro Nakamura², Akihiro Enta¹, Hiroyuki Takahashi² (1.Tsuruoka College, 2.Tobishima co.)

Keywords:Pulse streamer discharge, Bubbling, 1,4-dioxane

1,4-dioxan (1,4-DXA) is a hardly decomposable organic substance which cause damage such as cancers to human body. So, 1,4-DXA has been a regulation substance of the soil environmental standard. To decompose 1,4-DXA, a plasma-gas bubbling reactor has been developed by combining a pulse streamer discharge with a porous ceramic membrane with a thickness of 0.6 mm. 1,4-DXA aqueous solution of 1.7 L with an initial concentration of 1 mg/L was successfully decomposed to be less than 0.05 mg/L of the environmental standard 45 min later. It implies oxygen radicals such as O* and O₂* as well as ozone play an important role in 1,4-DXA degradation.