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Insolubilization of technetium in water covering paddy soils by indigenous bacteria
https://repo.qst.go.jp/records/53542
https://repo.qst.go.jp/records/53542e17918d3-b515-420b-9d4f-8c248f30431e
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2005-07-04 | |||||
| タイトル | ||||||
| タイトル | Insolubilization of technetium in water covering paddy soils by indigenous bacteria | |||||
| 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 |
Ishii, Nobuyoshi
× Ishii, Nobuyoshi× Tagami, Keiko× Uchida, Shigeo× 石井 伸昌× 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 | Microbially mediated insoluble technetium (Tc) formation was studied using surface water covering paddy fields. Surface water samples were collected from three kinds of flooded paddy soils: andosol, gley, and gray lowland soil. Insoluble Tc (> 0.2 micro m in size) was formed in all surface water samples. The amounts of insoluble Tc ranged from 48.7 +/- 2.2% of total Tc (gley) to 88.5 +/- 2.2% (gray lowland). Whereas, elimination of microbial cells from the surface water resulted in extremely low amount of insoluble Tc. This result suggested microbial contributions to insoluble Tc formation. In the investigated samples, fungi and bacteria were dominant species among microorganisms. The inhibition of fungal growth resulted in little changes in the insoluble Tc amount. In contrast, the inhibition of bacterial growth made obvious decreases of insoluble Tc amount. Sulfate-reducing bacteria have been known that they reduce and remove Tc from solution. In the surface water samples, Tc-insolubilizing bacteria other than sulfate-reducing bacteria were also included, because inhibition of sulfate-reducing bacteria did not influenced excessively the formation of insoluble Tc. From these results, indigenous bacterial community in surface water covering paddy fields would affect through insoluble Tc formation on the Tc behavior in the agricultural environment. | |||||
| 書誌情報 |
Proceedings of International Congress of the International Radiation Protection Association 巻 11, p. 6e4, 発行日 2004-05 |
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