Abstract
The purpose of this study was to verify radiocesium decontamination from Fukushima farmland by plants and to screen plants useful for phytoremediation. Thirteen species from three families (Asteraceae, Fabaceae, and Poaceae) of crops were grown in shallow and deeply cultivated fields (0–8 and 0–15 cm plowing, respectively). To change plowing depth was expected to make different contacting zone between root system and radiocesium in soil. The radioactivity values of the plants due to the radiocesium 134Cs and 137Cs were 22–179 and 29–225 Bq kg dry weight−1, respectively. The 134Cs and 137Cs transfer factors for plants grown in the shallow field ranged from 0.021 to 0.12 and fro 0.019 to 0.13, respectively, with the geometric means of 0.051 and 0.057, respectively. The 134Cs and 137Cs transfer factors for plants grown in the deep field ranged from 0.019 to 0.13 and from 0.022 to 0.13, respectively, with the geometric means of 0.045 and 0.063, respectively. Although a reducing ratio was calculated to evaluate the decrease in radiocesium from contaminated soil during cultivation (i.e., phytoremediation ability), no plant species resulted in a remarkable decrease in radiocesium in soil among the tested crops. These results should be followed up for several years and further analyses are required to evaluate whether the phytoremediation technique is applicable to radioactively contaminated farmlands.
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References
Bunzl K, Kracke W (1989) Seasonal variation of soil-to-plant transfer of K and fallout 134,137Cs in peatland vegetation. Health Phys 57:593–600
Ehlken S, Kirchner G (2002) Environmental processes affecting plant root uptake of radioactive trace elements and variability of transfer factor data: a review. J Environ Radioact 58:97–112
González AJ (2012) The recommendations of the ICRP vis-á-vis the Fukushima Dai-ichi NPP accident aftermath. J Radiol Prot 32:N1–N7
Kobayashi T (2011) Radiation measurements at the campus of Fukushima Medical University through the 2011 earthquake off the Pacific coast of Tohoku and subsequent nuclear power plant crisis. Fukushima J Med Sci 57:70–74
Kobayashi D, Miyake M, Kakamu T, Tsuji M, Mori Y, Fukushima T, Hazama A (2013) Reducing radiation exposure using commonly available objects. Environ Health Prev Med 18:261–266
Massas I, Skarlou V, Haidouti C (2002) Plant uptake of 134Cs in relation to soil properties and time. J Environ Radioact 59:245–255
Matsumura H, Saito K, Ishioka J, Uwamino T (2011) Diffusion of radioactive materials from Fukushima Daiichi Nuclear Power Station obtained by Gamma-ray measurements on expressways. Transact Atom Energy Soc Jpn 10:152–162 (article in Japanese with English abstract)
Mimura T, Mimura M, Komiyama C, Miyamoto M, Kitamura A (2014) Measurements of gamma (γ)-emitting radionuclides with a high-purity germanium detector: the methods and reliability of our environmental assessments on the Fukushima 1 Nuclear Power Plant accident. J Plant Res (2014)
National Institute for Agro-Environmental Sciences (2011) http://www.mext.go.jp/b_menu/shingi/chousa/gijyutu/017/shiryo/__icsFiles/afieldfile/2011/05/30/1306566_4.pdf
Putyatin YV, Seraya TM, Petrykevich OM, Howard BJ (2006) Comparison of the accumulation of 137Cs and 90Sr by six spring wheat varieties. Radiat Environ Biophys 44:289–298
Soudek P, Tykva R, Vanek T (2002) Plant uptake of 134Cs in relation to soil properties and time. J Environ Radioact 59:245–255
Soudek P, Valenová S, Vavrîkovâ Z, Vanek T (2006) 137Cs and 90Sr uptake by sunflower cultivated under hydroponic conditions. J Environ Radioact 88:236–250
Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Soil map of Fukushima Prefecture
Yamaguchi N, Eguchi S, Fujiwara H, Hayashi K, Tsukada H (2012) Radiocesium and radioiodine in soil particles agitated by agricultural practices: field observation after the Fukushima nuclear accident. Sci Total Environ 425:128–134
Zhu YG, Smalders T (2000) Plant uptake of radiocesium; a review of mechanisms, regulation, and application. J Exp Bot 51:1635–1645
Acknowledgments
This study was supported by the Mitsui & Co., Ltd. Environment Fund. We are grateful to Drs. Tetsuro Mimura, Mari Mimura, Chiyo Komiyama, and Akira Kitamura (Kobe University) for assisting in radioisotope measurements. The authors would like to thank Enago (http://www.enago.jp) for the English language review.
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Kobayashi, D., Okouchi, T., Yamagami, M. et al. Verification of radiocesium decontamination from farmlands by plants in Fukushima. J Plant Res 127, 51–56 (2014). https://doi.org/10.1007/s10265-013-0607-x
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DOI: https://doi.org/10.1007/s10265-013-0607-x