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

  • Sho OgasawaraEmail author
  • Atsushi Nakao
  • Tetsuya Eguchi
  • Takeshi Ota
  • Hisaya Matsunami
  • Junta Yanai
  • Takuro Shinano


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.


Agricultural soils Fukushima prefecture Micaceous mineral Potassium Radiocaesium 



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 ( for the English language review. Analyses of RCs measurements were carried out in the Laboratory of Radioisotopes of Kyoto Prefectural University.


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

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Sho Ogasawara
    • 1
    • 5
    Email author
  • Atsushi Nakao
    • 1
  • Tetsuya Eguchi
    • 2
  • Takeshi Ota
    • 3
  • Hisaya Matsunami
    • 2
  • Junta Yanai
    • 1
  • Takuro Shinano
    • 4
  1. 1.Graduate School of Life and Environmental SciencesKyoto Prefectural UniversityKyotoJapan
  2. 2.Tohoku Agricultural Research CentreNAROFukushimaJapan
  3. 3.Bio-oriented Technology Research Advancement InstitutionNAROKanagawaJapan
  4. 4.Graduate School of AgricultureHokkaido UniversityHokkaidoJapan
  5. 5.Japan Society for the Promotion of ScienceTokyoJapan

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