| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
Examination that the effect of addition of stable cesium on the transfer of radioactive cesium from paddy soil to rice using the soil of rice paddies of two areas in Fukushima city was performed. It was confirmed that the transfer factors of radioactive cesium for the brown rice cultivated with water including stable cesium ions were much larger than those for cultivated with water in which nothing had been added. This implies that the cesium ions added were replaced with radioactive cesium ions in soil.
The effect seemed to be strongly influenced by the difference of the soil ingredient. Another decontamination experiments were conducted on two types of soil contaminated with radioactive cesium, andosols and vermiculite, using an aqueous solution of potassium, rubidium or cesium. Rubidium ions contributed significantly to the removal of radioactive cesium from andosols, and did not cause plant growth disorders.
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