WEKO3
アイテム
Bioaccumulation of technetium by bacterial community in water covering a rice paddy field soil
https://repo.qst.go.jp/records/67761
https://repo.qst.go.jp/records/6776106756782-50cb-49d6-b095-751235268650
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2004-04-15 | |||||
| タイトル | ||||||
| タイトル | Bioaccumulation of technetium by bacterial community in water covering a rice paddy field soil | |||||
| 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 |
Ishii, Nobuyoshi
× Ishii, Nobuyoshi× Tagami, Keiko× 石井 伸昌× 田上 恵子 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Bioaccumulation of technetium (Tc) by bacterial community in water body covering a rice paddy field soil is studied to gain insight on the behavior of Tc in agricultural ecosystem. The radioactive tracer, pertechnetate (95mTcO4-), was added to aqueous solution collected from a waterlogged paddy field soil. The solution was incubated statically at 25 under dark conditions. Up to 80% of the total 95mTc was removed from the solution for 4 days. However, little 95mTc was removed; from both a cell-free filtrate solution and a filtrate mixed with autoclaved cell particles at day 4. The maximum removal of the 95mTc, about 85%, was achieved by addition of nutrients to the solution. When activities of bacteria inhibited by addition of antibiotics, only 23% of the 95mTc was removed. Addition of cycloheximide, however, did not affect on the removal of the 95mTc. These results indicate that the bacterial community living in water body accumulates Tc. In order to determine the effects of oxygen level on Tc removal, bacterial communities were incubated under aerobic and anaerobic conditions. It is reasonable that the bacterial community cultured under anaerobic conditions removed 80% of Tc from the solution, however, interestingly, the bacterial community grown under aerobic conditions also showed Tc removal of 30%. The result implies that aerobic bacterial communities have a potential for removing Tc from aqueous solutions. |
|||||
| 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 | International Conference on Protection of the Environment from the Effects of Ionizing Radiation | |||||
| 発表年月日 | ||||||
| 日付 | 2003-10-10 | |||||
| 日付タイプ | Issued | |||||
