Radiation-Chemical Degradation of Oxalic Acid in Water Solutions

Abstract

Abstract:Co 60 gamma ray radiolysis of aqueous oxalic acid solution (1 × 10 -2 M) was investigated within the dose range up to 80kGy. The value of pH increases from 2.0 to 4.0 and approximately 90% of oxalic acid and its derivatives are degraded at the dose of 80 kGy. Dissolved O 2 affects to the degradation of oxalic acid at the initial stage due to total consumption of O 2 at the dose of 2 kGy. Formation of CO 2 occurs at a higher rate at the initial stage until the dissolved O 2 is fully consumed. The kinetic model of oxalic acid degradation in aqueous solution under the gamma irradiation was tested. The suggested mechanism complies with the experimental data both of our own and of that reported earlier.

Radiolytic decomposition of oxalic acid in nuclear power plant by gamma irradiation

“…After deploying Siemen's permanganic acid-complexing organic reduction decontamination process (HP-CORD), oxalic acid was usually used for decontamination of water-cooled reactors such as pressurized power reactor and boiled water reactor. HP-CORD involves several steps accomplishing successive oxidation, complexation, solubilisation and separation of radionuclides (Gordeev et al 2005; Gurbanov and Guliyeva 2007; Gurbanov et al 2015). High e cient reduction and complexation potential of oxalic acid enables to reduce the amount of waste with very excellent decontamination results.…”