Effects of alumina powder characteristics on H and HO production yields in -radiolysis of water and 0.4M HSO aqueous solution

Yamada, Reiji; Kumagai, Yuta   

The effects of powder characteristics on H and HO2 productions in Co -radiolysis were studied in pure water and in 0.4M HSO aqueous solutions containing alumina powders. In 0.4 M HSO solution, the H yields strongly depended on alumina structures and decreased in the order of , , alumina, although the specific surface areas increased as , , . The yields increased with increasing specific surface area when compared am-alumina. In pure water, similar dependence was observed but not as strong as that for 0.4 M HSO solution. The HO yields were strongly decreased by adding the alumina powders in both water and 0.4 M HSO aqueous solution, although the amounts of decrease were almost neither correlated with specific surface areas nor structures. The enhancing H production was discussed in terms of the electron supply from alumina to aqueous solution as well as the adsorption of OH radicals on alumina surfaces.