Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 66(8): 277-287 (2017)


自然環境下において放射性セシウム濃度が低いキノコの種類の推定Estimation of Wild Mushroom Species with Low Radiocaesium Concentrations under Natural Conditions

国立研究開発法人量子科学技術研究開発機構放射線医学総合研究所廃棄物技術開発研究チームBiospheric Assessment for Waste Disposal Team, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology ◇ 263–8555 千葉県千葉市稲毛区穴川4–9–1 ◇ 4–9–1 Anagawa, Inage-ku, Chiba-shi, Chiba Pref. 263–8555, Japan

受付日:2017年3月7日Received: March 7, 2017
受理日:2017年4月12日Accepted: April 12, 2017
発行日:2017年8月15日Published: August 15, 2017


Mushrooms are known to accumulate radiocaesium, however, their radiocaesium concentrations would depend on the mushroom species and their growing environments. It is, however, difficult to evaluate the ability to absorb radiocaesium by mushroom species now by simply using the radiocaesium concentrations in wild mushrooms because radiocaesium depositions on the land surface in the eastern Japan differs several orders of magnitude from region to region due to the TEPCO’s Fukushima Dai-ichi Nuclear Power Plant Accident. In this study, therefore, we focused on global fallout 137Cs concentration data in wild mushrooms. Using the data, we ranked 43 wild mushroom species those potentially contained radiocaesium from low to high concentrations. We successfully estimated some low concentration wild mushroom species and these species were indeed significantly low in radiocaesium concentrations. The estimated Cs concentration ranking could provide a useful information to restart wild mushroom collection.

Key words: global fallout; Fukushima dai-ichi nuclear power plant accident; wild mushroom; 134Cs/137Cs concentration ratio; excess amount 137Cs

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