| Title | The transfer of fallout plutonium from paddy soil to rice: A field study in Japan |
| Authors | Ni, Youyi Wang, Zhongtang Zheng, Jian Tagami, Keiko Guo, Qiuju Uchida, Shigeo Tsukada, Hirofumi |
| Affiliation | Natl Inst Radiol Sci, Natl Inst Quantum & Radiol Sci & Technol, Inage Ku, 4-9-1 Anagawa, Chiba 2638555, Japan Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China Fukushima Univ, Inst Environm Radioecol, 1 Kanayagawa, Fukushima 9601296, Japan |
| Keywords | Plutonium Transfer factor Rice Chemical analogue Paddy field |
| Issue Date | 2019 |
| Publisher | JOURNAL OF ENVIRONMENTAL RADIOACTIVITY |
| Abstract | Reported transfer factor (TF) values of Pu from paddy soil to rice are rather scarce, despite the radiotoxicity of Pu and the irreplaceable role of rice in Asian peoples' diets. Here, we conducted a field study to investigate the transfer of global fallout Pu from paddy soil to rice grain (hulled rice) in Japan. The Pu-240/Pu-239 atomic ratios in two rice grain samples out of 16 samples were determined and the ratios corresponded well with the global fallout value. The soil-to-rice TFPu in 12 Japanese prefectures ranged from 4.5 x 10(-6) to 1.2 x 10(-4) with a geometric mean of 3.3 x 10(-5). The TFs of rice obtained in this study were compatible to the TFs for the broad heading "cereals" compiled in the IAEA Technical Report Series No. 472. Weak correlations were found between the TF and the investigated soil characteristics such as soil pH and loss on ignition. Regarding the TFs for cerium (Ce) and thorium (Th) which are commonly considered as Pu analogues, we observed no significant correlations between the log(TFPu) and log(TFCe) or log(TFPu) and log(TFTh). On the other hand, interestingly, a significantly positive correlation (r = 0.795, p < 0.001) was observed between log(TFPu) and log(TFU). In view of the observed similarity of TF values for U and Pu from soil to rice, we thought that using the easy-to-measure TFU to estimate TFPu from soil to rice might be suggested although the mechanism was unclear. |
| URI | http://hdl.handle.net/20.500.11897/552356 |
| ISSN | 0265-931X |
| DOI | 10.1016/j.jenvrad.2018.10.010 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 物理学院 核物理与核技术国家重点实验室 |
