Generation Behavior at Normal Pressures and Reactions of Highly Concentrated O-

Generation behaviors at normal pressures and reactions of the oxygen radical anion (O^- ion) have been studied. Highly concentrated O^- ions which are encaged by a microporous crystal 12CaO · 7Al₂O₃ (C12A7) are emitted in the atmosphere with N₂ gas at 975K or more and the emission speed is up to 1.7*10^-7 mol/(s*m2). Emitted O- ions are easy to dissolve ion-exchanged water and it can make acidic water up to pH 2.9. The prediction of the existence of O^- ions in low pH water as anion components is confirmed by ESR spectrum and anion liquid chromatogram. It is found that the O- ions have redox reactivity for a Si-surface, Nitroblue-Tetrazolium (NBT), and fungus disinfection ability.