2014 Fiscal Year Final Research Report
Development of Radioactive Cs removal method from polluted soils by leaching with exchangeable cations contained organic acid solutions
| Project/Area Number |
25660050
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Meiji University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OZAWA Kiyoshi 明治大学, 農学部, 教授 (40360391)
FUJIWARA Shunrokuro 明治大学, 農学部, 教授 (80575473)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 土壌中放射性セシウム除去 / 含陽イオン有機酸 / 洗浄法 |
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| Outline of Final Research Achievements |
Polluted soils with radioactive elements are widely distributed by the explosion of Fukushima No.1 NPS caused by the Tsunami attack at March 2011. 137Cs is a main marker of the radioactivity and it accumulated in surface; 5cm depth of the polluted soils. So, the official removal is cut off 5cm of the surface soils both of agriculture and around houses. The high contaminated cut off soils are packed in big plastic bags and pile up at near the removal places. We investigated effective removal method by dropping or saturated leaching with exchangeable cation contained organic acids under normal temperature by reason of low cost removal.
Results (1)137Cs is strongly adsorbed on clay fraction and the adsorbed on clay is most difficult to remove. (2) Dropping leaching method is not effective to remove, and the best result of saturated leaching is about 15% removal. (3) The best result is about 35% removal by saturated (1:10) stirring and filtered after 3 times under normal temperature.
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| Free Research Field |
土壌学
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