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Time dependence on plant availability of radionuclides in two Japanese soils under upland and paddy field conditions
https://repo.qst.go.jp/records/53665
https://repo.qst.go.jp/records/536659e793e5c-2a7d-40de-a7bf-c4065ae6711b
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-05-31 | |||||
| タイトル | ||||||
| タイトル | Time dependence on plant availability of radionuclides in two Japanese soils under upland and paddy field conditions | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Uchida, Shigeo
× Uchida, Shigeo× Tagami, Keiko× 内田 滋夫× 田上 恵子 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In the soil environment, radionuclides or stable isotopes can change their forms physico-chemically and their fixation by soils can occur as a function of time. In order to investigate the time dependence on plant availabilities of Mn, Zn, Co, Sr, Cs and Tc in two soils under two different water contents, corresponding to upland and paddy field condition, a radiotracer experiment was carried out. The plant available fraction, that is, water soluble and ion exchangeable part, is determined by selective extraction methods with 0.05 M CaCl2 (CA) and 0.5 M CH3COOH (AA). The results showed that the amounts of CA extractable Mn, Zn, Co and Cs decreased rapidly to almost zero within a few days after being freshly introduced to the soil. The amount of CA extractable Sr was almost the same during 6-month. The AA extractable Mn, Zn, Co, Sr and Cs were decreased linearly during the period. It was found that the decreases in CA- and AA- Mn, Zn, Co and Cs were not influenced by the soil redox conditions but soil types. However, for Tc, the amount of plant available Tc was lower in the anaerobic condition than in the aerobic conditions. Due to the reduce of the amounts of plant available forms of these elements in soils, the amounts of these elements entering the food chain probably decrease gradually with time. |
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| 書誌情報 |
Distribution and Speciation of Radionuclides in the Environment : Proceedings of the International Workshop on Distribution and speciation of Radionuclides in the Environment, Rokkasho, Aomori, Japan, October 11-13, 2000 p. 239-245, 発行日 2001 |
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| 出版者 | ||||||
| 出版者 | Institute for Environmental Sciences | |||||
