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Effect of aluminum metal surface on oxidation of iodide under gamma irradiation conditions

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Abstract

The effects of aluminum surface on I− oxidation under gamma irradiation were investigated. Without irradiation, only O2 oxidized I− at pH < 2, and aluminum expedited the oxidation reaction. With irradiation, the radiolysis products from water and air oxidized I− into \({{\text{I}}_{3}}^{ - } .\) At pH < 2, O2 generated by water radiolysis additionally oxidized I−. However, at pH > 6, the H2O2 radiolysis product reduced \({{\text{I}}_{3}}^{ - }\) into I−. A smaller amount of \({{\text{I}}_{3}}^{ - }\) was observed in pH 1.9 and 3.3 solutions in contact with aluminum under irradiation because oxidants preferentially oxidize aluminum rather than I−. Moreover, for pH < 6.0, even less \({{\text{I}}_{3}}^{ - }\) was formed by aluminum exposed to air because air radiolysis products also preferentially oxidized aluminum.

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Acknowledgments

This work was supported by the Nuclear Research and Development Program through the National Research Foundation of Korea and funded by the Ministry of Science, Information Communication Technology and Future Planning, Republic of Korea.

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Authors and Affiliations

  1. Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea

    Sue Young Hong, Sang-Hyuk Jung & Jei-Won Yeon

  2. School of Quantum Energy Chemical Engineering, University of Science and Technology, 217 Gajeong ro, Yuseong-gu, Daejeon, 305-350, Republic of Korea

    Sue Young Hong

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  1. Sue Young Hong
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Correspondence to Jei-Won Yeon.

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Hong, S.Y., Jung, SH. & Yeon, JW. Effect of aluminum metal surface on oxidation of iodide under gamma irradiation conditions. J Radioanal Nucl Chem 308, 459–468 (2016). https://doi.org/10.1007/s10967-015-4503-9

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