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Hydrogen peroxide production by $$gamma$$ radiolysis of sodium chloride solutions containing a small amount of bromide ion

微量の臭化物イオンを含むNaCl水溶液への$$gamma$$線照射による過酸化水素生成

端 邦樹; 井上 博之*; 小嶋 崇夫*; 岩瀬 彰宏*; 笠原 茂樹; 塙 悟史; 上野 文義; 塚田 隆

Hata, Kuniki; Inoue, Hiroyuki*; Kojima, Takao*; Iwase, Akihiro*; Kasahara, Shigeki; Hanawa, Satoshi; Ueno, Fumiyoshi; Tsukada, Takashi

$$gamma$$ radiolysis experiments of solutions, which consisted of a mixture of NaCl and NaBr, were conducted to confirm the validity of radiolysis calculations of seawater simulated solutions and to determine the importance of Br$$^{-}$$ in the production of H$$_{2}$$O$$_{2}$$ via water radiolysis. The steady-state concentration of H$$_{2}$$O$$_{2}$$ in each solution was measured after irradiation and compared to that obtained by radiolysis calculations. It was found that the calculated and experimental results were in good agreement. The concentration of H$$_{2}$$O$$_{2}$$ in the 0.6 M NaCl solution increased approximately three times by the addition of 1 mM NaBr. The result showed that Br$$^{-}$$ plays an important role in the production of H$$_{2}$$O$$_{2}$$ by water radiolysis, presumably due to the reactions of Br$$^{-}$$ with hydroxyl radical. The H$$_{2}$$O$$_{2}$$ production of 1 mM NaCl solutions increased when the pH was either higher or lower than 8. It was considered that hydrated electron also plays an important role in H$$_{2}$$O$$_{2}$$ production in these acidic and alkaline conditions.

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パーセンタイル:57.25

分野:Nuclear Science & Technology

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