Gamma-Radiolysis of Water and Some Aqueous Solutions under N2Gas Bubbling

Abstract

The γ-radiolysis of water subjected to gas bubbling has been studied using a specially desinged gasloop. During the irradiation, N2 gas was bubbled from the bottom of the irradiation vessel. As the N2 gas feed rate was raised, the apparent G(H2) value increased in keeping therewith, from 5 × l0−3 to 0.26. However in the presence of a sufficient amount of O2 or H2O2, G(H2) was raised almost to the level of the molecular yield. With reasonable assumptions, it could be concluded that 3∼5 × 10−6 mol/l of H2O2 was sufficient to reduce the back reaction of molecular products to less than 10% under the present experimental conditions. It was also found that the G(H2) value increased with CH3OH concentration roughly in proportion to log(CH3OH), and reached 3.1 with 0.1 mol/l CH3OH.