Identification of chemical form of cesium contained in incineration bottom ash and evaluation of its long term stability.
| Project/Area Number |
24510089
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Hokkaido University |
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Principal Investigator |
TOJO Yasumasa 北海道大学, 工学(系)研究科(研究院), 准教授 (70250470)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | セシウム / 焼却灰 / 廃棄物処理 / 最終処分場 / 焼却底灰 / 焼却主灰 |
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| Outline of Final Research Achievements |
In this study, why cesium (Cs) contained in incineration bottom ash is hardly soluble, was investigated by focusing on its chemical form. By combusting simulated waste with stable Cs, artificially created bottom ash in which Cs content became high was created. From the observation by scanning electron microscope and polarization microscope, it was found that Cs accumulates at peripheral area of specific mineral. In its location, glassy amorphous phase formed and Cs is captured in it physically. The mineral is comprised of aluminum, silicon, and oxygen, mainly. To investigate the origin of the mineral, several inorganic and organic material was combusted with stable Cs and its ash was analyzed by the same method. However, the similar mineral was not identified. Clay mineral was too small when comparing to the mineral, which capture Cs in high concentration and was identified in artificially created ash.
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Report
(4 results)
Research Products
(7 results)
