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

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

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.

Language	:	English
Journal	:	Nuclear Technology
Volume	:	193
Number	:	3
Pages	:	p.434 - 443
Publication Year/Month	:	2016/03
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Paper URL	:	https://doi.org/10.13182/NT15-32
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	seawater; radiolysis; hydrogen peroxide; Fukushima Daiichi Nuclear Power Station Accident; 福島第一原子力発電所事故
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Cooperating Institute	:	大阪府立大学

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Registration No. : AA20140850
JAEA Abstracts No. : 44000979
Paper Submission No. : 17667

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