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Technetium-99 transfer from soil to plants collected in Chernobyl area
https://repo.qst.go.jp/records/68500
https://repo.qst.go.jp/records/6850056166734-9d83-4bb7-a1c9-4ae97fc04812
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-06-19 | |||||
| タイトル | ||||||
| タイトル | Technetium-99 transfer from soil to plants collected in Chernobyl area | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
Tagami, Keiko
× Tagami, Keiko× Uchida, Shigeo× 田上 恵子× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Technetium-99 (99Tc) is of great practical importance because it is one of the fission products with a relatively high yield in the thermal neutron fission of 235U and 239Pu (ca. 6%) and it has a long half-life of 2.1x105y. The major sources of 99Tc in the environment are from fission in nuclear weapons and in reactors. The dominant species of Tc in natural aqueous solution in equilibrium with the atmosphere is the pertechnetate, TcO4-. In the terrestrial environment, TcO4- has a high geochemical mobility and availability for plants (IAEA, 1994). Several assessments have suggested that the Tc uptake by plants is one of the key parameters in governing the Tc radiation dose to humans. The chemical form of Tc, however, changes with environmental conditions (Tagami, 2003). Thus it is necessary, for realistic assessment, to obtain transfer parameters, such as soil-to-plant transfer factors (TFs), under natural conditions, but the data have been limited due to trace levels of 99Tc. The transfer factor (TF) is defined as "activity in vegetation on dry or wet weight basis (Bq/g)" divided by "average activity in soil during planting period (Bq/g)". In order to obtain TF for Tc under natural conditions, soil and plant samples collected from Chernobyl site where 99Tc concentration levels have already been shown to be higher than those from global fallout 99Tc (Uchida et al., 1999) were studied. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 8th International Conference on the Biogeochemistry of Trace Elements | |||||
| 発表年月日 | ||||||
| 日付 | 2005-04-07 | |||||
| 日付タイプ | Issued | |||||
