Gamma-Radiolysis of Aqueous Boric Acid Solution
1969 年 6 巻 4 号 p. 163-169
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1969 年 6 巻 4 号 p. 163-169
The γ-radiolysis of aqueous boric acid solutions of relatively high concentration has been studied. Boric acid significantly promotes hydrogen formation up to 10-7 molm/l but does not increase oxygen and hydrogen peroxide to any appreciable extent. Since boric acid reacts at a relatively slow rate with species formed by the primary process of water radiolysis, when an effective scavenger for e-aq - the precursor of H2 - such as NO-3 is present, boric acid has no effects upon the total yield of H2 in the range of concentrations studied. However, the yields of other products of the radiolysis - H2O2 and NO-2 -are significantly reduced at high concen-trations of boric acid when NO-3 is present.
These results are explained by established reaction schemes for the radiolysis of aqueous solution. Based upon the behavior of NO-2 from nitrate solutions, it is suggested that -2 reacts with H3BO3 or H2BO3 radicals, the plausible reaction product from the reaction,
H3BO3 + OH → H2O + H2BO3.
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