Vertical distribution and formation analysis of the 131I, 137Cs, 129mTe, and 110mAg from the Fukushima Dai-ichi Nuclear Power Plant in the beach soil
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We have investigated vertical distributions of 110mAg, 131I, 129mTe, and 137Cs and existence in beach soil collected three months after the Great East Japan Earthquake. All the nuclides passed through tsunami deposit and original beach soil, then reached fine particle layer lying beneath them in the three months. Moreover, depth profiles of all the nuclides did not exhibit exponential decrease. Behavior of 131I, 129mTe, and 137Cs were explained with distribution coefficients (K d) but that of 110mAg was not explained. Particulate form was observed for the 137Cs; number of the particle was proportional to the 137Cs concentration in the soil sample.
KeywordsBeach soil Vertical distribution FDNPP accident Hot spots
The authors should like to thank Prof. Yuichi Onda, Dr. Hiroaki Kato, and Mr. Tsutomu Takahashi, University of Tsukuba, for their assistances in the overall measurements. This work was supported by the JSPS KAKENHI Grant No. 24246156, 24110006, 256895, and the reconstruction support program for eastern Japan at the University of Tsukuba. Author Y. S. received Grant-in-Aid for JSPS Fellows.
- 3.IAEA (2010) Handbook of parameter values for the prediction of radionuclide transfer in terrestrial and freshwater environments. Tech Rep Ser No. 472Google Scholar
- 6.Matsunaga T, Koarashi J, Atarashi-Andoh M, Nagao S, Sato T, Nagai H (2013) Comparison of the vertical distributions of Fukushima nuclear accident radiocesium in soil before and after the first rainy season, with physicochemical and mineralogical interpretations. Sci Total Environ 447:301–314CrossRefGoogle Scholar
- 7.Komai T, Kawabe Y, Hara J, Sakamoto Y, Zhang M (2012) Geochemical survey of tsunami sediments and transport of toxic elements from offshore environment-Urgent investigation for earthquake March 11, 2011-. Proc ISOPE-2012 22:49–53Google Scholar
- 8.Szczuciński W, Kokociński M, Rzeszewski M, Chagué-Goff C, Cachão M, Goto K, Sugawara D (2012) Sediment sources and sedimentation processes of 2011 Tohoku-oki tsunami deposits on the sendai plain, Japan—Insights from diatoms, nannoliths and grain size distribution. Sediment Geol 282:40–56CrossRefGoogle Scholar
- 9.Japan Meteorological Agency, Automated meteorological data acquisition system (AMeDAS) (2014), http://www.jma.go.jp/jma/indexe.html. Accessed 30 Sept 2013