Use of a size-resolved 1-D resuspension scheme to evaluate resuspended radioactive material associated with mineral dust particles from the ground surface Masahide Ishizuka a, * , Masao Mikami b, 1 , Taichu Y. Tanaka c, 2 , Yasuhito Igarashi d, 3 , Kazuyuki Kita e, 4 , Yutaka Yamada f, 5 , Naohiro Yoshida g, 6, 7 , Sakae Toyoda g, 8 , Yukihiko Satou h, 9 , Takeshi Kinase e, 10 , Kazuhiko Ninomiya i, 11 , Atsushi Shinohara i, 11 a Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa, 761-0396, Japan b Japan Meteorological Business Support Center, 3-17 Kanda-Nishikicho, Chiyoda-ku, Tokyo,101-0054, Japan c Atmospheric Environment Division, Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, 100-8122, Japan d Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki, 305-0052, Japan e Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512, Japan f RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan g Tokyo Institute of Technology, G1-17, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan h University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan i Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan article info Article history: Received 24 December 2015 Accepted 27 December 2015 Available online xxx Keywords: Size-resolved resuspension scheme Secondary emission Radioactive aerosol Dust emission Fukushima Nuclear Power Plant Accident abstract A size-resolved, one-dimensional resuspension scheme for soil particles from the ground surface is proposed to evaluate the concentration of radioactivity in the atmosphere due to the secondary emission of radioactive material. The particle size distributions of radioactive particles at a sampling point were measured and compared with the results evaluated by the scheme using four different soil textures: sand, loamy sand, sandy loam, and silty loam. For sandy loam and silty loam, the results were in good agreement with the size-resolved atmospheric radioactivity concentrations observed at a school ground in Tsushima District, Namie Town, Fukushima, which was heavily contaminated after the Fukushima Dai- ichi Nuclear Power Plant accident in March 2011. Though various assumptions were incorporated into both the scheme and evaluation conditions, this study shows that the proposed scheme can be applied to evaluate secondary emissions caused by aeolian resuspension of radioactive materials associated with mineral dust particles from the ground surface. The results underscore the importance of taking soil texture into account when evaluating the concentrations of resuspended, size-resolved atmospheric radioactivity. © 2016 Elsevier Ltd. All rights reserved. * Corresponding author. Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa, 761-0396, Japan. E-mail addresses: ishizuka@eng.kagawa-u.ac.jp (M. Ishizuka), mikami@jmbsc.or.jp (M. Mikami), taichu_tanaka@met.kishou.go.jp (T.Y. Tanaka), igarash@mri-jma.go.jp (Y. Igarashi), kazuyuki.kita.iu@vc.ibaraki.ac.jp (K. Kita), yamadayu@riken.jp (Y. Yamada), yoshida.n.aa@m.titech.ac.jp (N. Yoshida), toyoda.s.aa@m.titech.ac.jp (S. Toyoda), yukihiko@ied.tsukuba.ac.jp (Y. Satou), tacchan.antarctica@gmail.com (T. Kinase), ninokazu@chem.sci.osaka-u.ac.jp (K. Ninomiya), shino@chem.sci.osaka-u.ac.jp (A. Shinohara). 1 International Division, Japan Meteorological Business Support Center 3e17 Kanda-Nishikicho, Chiyoda-ku, Tokyo, 101-0054, Japan. 2 Atmospheric Environment Division, Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, 100e8122, Japan. 3 Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki, 305-0052, Japan. 4 Faculty of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512, Japan. 5 Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan. 6 Dept. of Environmental Chemistry & Engineering, Dept. of Environmental Science & Technology, The Research Center for the Evolving Earth & Planets, Tokyo Institute of Technology G1-17, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan. 7 Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo,152-8551, Japan. 8 Dept. of Environmental Science & Technology, Tokyo Institute of Technology G1-17, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan. 9 M.Env. Sc. Yukihiko Satou Graduate School of Pure and Applied Sciences, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan. 10 M. Sc. Takeshi KinaseGraduate school of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512, Japan. 11 Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan. Contents lists available at ScienceDirect Journal of Environmental Radioactivity journal homepage: www.elsevier.com/locate/jenvrad http://dx.doi.org/10.1016/j.jenvrad.2015.12.023 0265-931X/© 2016 Elsevier Ltd. All rights reserved. Journal of Environmental Radioactivity xxx (2016) 1e13 Please cite this article in press as: Ishizuka, M., et al., Use of a size-resolved 1-D resuspension scheme to evaluate resuspended radioactive material associated with mineral dust particles from the ground surface, Journal of Environmental Radioactivity (2016), http://dx.doi.org/ 10.1016/j.jenvrad.2015.12.023