2018 Fiscal Year Final Research Report
Radiostrontium pollution in Ukedo River by the Fukushima Daiichi Nuclear Power Plant accident
| Project/Area Number |
15K20881
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Risk sciences of radiation and chemicals
Modeling and technologies for environmental conservation and remediation
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| Research Institution | Kindai University (2018)
Ibaraki University (2015-2017) |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Keywords | 放射性ストロンチウム / 福島第一原子力発電所事故 / 河川 |
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| Outline of Final Research Achievements |
We investigated that radiostrontium pollution in Ukedo River by the Fukushima Daiichi Nuclear Power Plant accident. Our result showed that radiostrontium concentration of soil around the river tended to be specifically high at a tributary river flowing into the upstream of Ukedo River than other areas of that river. Similar to the radiostrontium concentration of the soil, our result also showed that radiostrontium concentration of river water and fish bone tended to be specifically high at that tributary river flowing into the upper Ukedo River. These result indicates to be radiostrontium pollution by the Fukushima Daiichi Nuclear Power Plant accident in some areas upstream of the Ukedo River from 2015 to 2018.
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| Free Research Field |
環境化学，同位体生態学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究（2015～2018年）により，請戸川上流域を流れる小河川において原発事故に由来する放射性Srによる汚染が明らかとなった．このことは，原発事故由来の放射性Srによる請戸川上流域の汚染が2018年でも続いていることを意味している．一方，請戸川が流れ込む福島県の太平洋沿岸域では，2015年の段階で原発事故由来の放射性Sr汚染が見られなくなったことが示唆されている（Karube et al. 2016，Environ Sci Pollut Res 23:17095-17104）．従って，原発事故由来放射性Srによる陸水環境の汚染は海洋環境とは異なり，長期的な問題として捉える必要があるといえる．
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