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The extractability of potassium and radiocaesium in soils developed from granite and sedimentary rock in Fukushima, Japan

Abstract

Potassium (K) and radiocaesium (RCs) were chemically extracted from soils derived from granite (G soils) and sedimentary rock (S soils) in Fukushima, Japan. The extractants employed were 1 M HNO3, concentrated HNO3, and HF + HClO4. As S soils contain a lower amount of trioctahedral 2:1 phyllosilicates than G soils, the RCs/K ratio was higher in S soils than in G soils with 1 M HNO3 extraction, indicating that the potential risk of soil-to-plant transfer of RCs is higher in S soils than in G soils. In conclusion, information about surface geology is important in predicting the spatial pattern of soil characteristics related to transferability of RCs.

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Acknowledgements

Gratitude is expressed to the Food Safety and Consumer Affairs Bureau, MAFF, prof. Shin Moono (Faculty of Food and Agricultural Sciences, Fukushima University), Dr. Yuzo Manpuku (Institute for Agro-Environmental Sciences, NARO), Dr. Tomoaki Nemoto (Fukushima Prefectural Government), Dr. Takashi Saito (same as above), Mr. Kazuhiro Kohata (same as above), and the agricultural department of Minamisoma city and Namie town who helped soil samples collection. Authors also appreciate Ms. Yuko Abe (Tohoku Agricultural Research Centre, NARO) for the help of experiments. The authors would like to thank Enago (www.enago.jp) for the English language review. Analyses of RCs measurements were carried out in the Laboratory of Radioisotopes of Kyoto Prefectural University.

Funding

This work was financially supported by the JSPS KAKENHI (Grant Numbers JP15J06569 and 16H06188).

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Correspondence to Sho Ogasawara.

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Ogasawara, S., Nakao, A., Eguchi, T. et al. The extractability of potassium and radiocaesium in soils developed from granite and sedimentary rock in Fukushima, Japan. J Radioanal Nucl Chem 323, 633–640 (2020). https://doi.org/10.1007/s10967-019-06971-2

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Keywords

  • Agricultural soils
  • Fukushima prefecture
  • Micaceous mineral
  • Potassium
  • Radiocaesium