2018年10月1日
Cesium desorption behavior of weathered biotite in Fukushima considering the actual radioactive contamination level of soils
Journal of Environmental Radioactivity
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- 巻
- 190-191
- 号
- 開始ページ
- 81
- 終了ページ
- 88
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jenvrad.2018.05.006
- 出版者・発行元
- Elsevier Ltd
For the better understanding of radioactive contamination in Fukushima Prefecture at present and in future, Cs desorption experiments have been conducted mainly using weathered biotite (WB) collected from Fukushima Prefecture and considering the actual contamination level (∼10−10 wt%) of radiocesium in Fukushima Prefecture. In the experiments, 137Cs sorbed to WB by immersing in 137Cs solution for one day was mostly desorbed by solutions of 1 M NaNO3, 1 M LiNO3, 10−1 M HCl, and 10−1 M HNO3, although it was barely desorbed by 1 M KNO3, 1 M CsNO3, 1 M NH4NO3, and natural seawater. X-ray diffraction analysis of WB after immersing in these solutions suggested that the collapse of the hydrated interlayers in WB suppressed the desorption of Cs. On the other hand, 137Cs was barely desorbed from WB even by the treatments with solutions of NaNO3 and LiNO3 if the duration for the sorption was longer than approximately two weeks, as well as radioactive WB collected from actual contaminated soils in Fukushima Prefecture. This result implies that Cs sorbed in WB became more strongly fixed with time. Probably removal of radiocesium sorbed in weathered granitic soil at Fukushima Prefecture is difficult by any electrolyte solutions, as more than seven years have passed since the accident.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jenvrad.2018.05.006
- ISSN : 1879-1700
- ISSN : 0265-931X
- eISSN : 1879-1700
- PubMed ID : 29775841
- SCOPUS ID : 85047082745