Presentation Information
[1F04]UV decomposition of oxalic acid by controlling hydrogen peroxide injection using Redox potential
*Hideyuki Hosok1, Kazushige Ishida1, Takashi Ohira2, Shintaro Yanagisawa2 (1. Hitachi, 2. Hitachi GE Vernova)
Keywords:
Chemical decontamination,Oxalic acid,Hydrogen peroxide,Redox potential
In a method that uses UV and H2O2 to decompose oxalic acid used in chemical decontamination, the formation of Fe2+ ions by photochemical reaction and the formation of Fe3+ ions by H2O2 occur at the same time. When we investigated the relationship between redox potential, which depends on the concentration ratio of Fe3+ and Fe2+, and residual H2O2, we found that H2O2 remains when the potential is high. Applying this relationship, the decomposition of oxalic acid using UV and H2O2 was carried out in simulating chemical decontamination. By controlling the injection rate of H2O2 using the redox potential as an index, it was confirmed that oxalic acid can be completely decomposed without residual H2O2.