2009 Fiscal Year Final Research Report
Study on migration behavior of ions bentonite under electrical potential gradient
| Project/Area Number |
19360430
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
IDEMITSU Kazuya Kyushu University, 大学院・工学研究院, 教授 (10221079)
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| Co-Investigator(Kenkyū-buntansha) |
INAGAKI Yaohiro 九州大学, 大学院・工学研究院, 准教授 (80203199)
ARIMA Tatsumi 九州大学, 大学院・工学研究院, 助教 (60264090)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 放射性廃棄物 / ベントナイト粘土 / 還元環境 / 鉄イオン / みかけの拡散係数 / 分散係数 / 間隙水pH |
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| Research Abstract |
Migration behavior of ions in bentonite is important for safety assessment of radioactive wastes disposal. However it is difficult to carry out migration experiments under reducing condition like real deep geological disposal. Moreover there are some ions which migrate very slowly in bentonite. Thus a special method is needed to obtain migration parameters within reasonable time and appropriate condition. The proposer has developed the electromigration method to obtain migration parameters of ions in bentonite by acceleration of ions. This method can provide stable reducing condition in bentonite. By using this method we obtained diffusion coefficients and dispersion coefficients of ferrous ion, alkali ions and alkali earth ions under the reducing condition.
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