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Determination of naturally occurring uranium concentrations in seawater, sediment, and marine organisms in Japanese estuarine areas
https://repo.qst.go.jp/records/69817
https://repo.qst.go.jp/records/698170fe6c393-0699-469c-a8e2-216e58c0c7c6
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-07-28 | |||||
| タイトル | ||||||
| タイトル | Determination of naturally occurring uranium concentrations in seawater, sediment, and marine organisms in Japanese estuarine areas | |||||
| 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 |
Takata, Hyoe
× Takata, Hyoe× Aono, Tatsuo× Tagami, Keiko× Uchida, Shigeo× 高田 兵衛× 青野 辰雄× 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 | For safety assessments of geological repositories of nuclear waste, understanding of uranium (U) fate in estuarine areas is important because U chemical behavior in the areas is expected to be complex. Environmental transfer parameters such as sediment-water distribution coefficients (Kd) and concentration factors (CFs) for marine organisms are useful in mathematical models for the assessment. However, due to its low concentration in estuarine water, Kd and CF data for U are scarce. Thus we studied a rapid method for separation and concentration of U from estuarine water samples using NOBIAS-CHELATE PA1 resin columns followed by inductively coupled plasma mass spectrometry (ICP-MS) for U measurement. Chemical recovery was about 100% at pH of 5.7 from the water samples and alkali and alkaline earth metals were removed. The method was used to measure U concentrations in estuarine water samples collected at eight Japanese estuarine areas; they ranged from 0.1 to 3.8 ug/L. We also measured U concentrations in sediment and marine organism samples by ICP-MS after acid digestion. Using these values, we observed Kd (range: 39-284 L/kg) and CFs (0.86-52 L/kg for macroalgae, 0.087-15 L/kg for crustaceans, and 0.52-93 L/kg for molluscs). |
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| 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 | The Fifth International Symposium on Radiation Safety and Detection Technology (ISORD-5) | |||||
| 発表年月日 | ||||||
| 日付 | 2009-07-17 | |||||
| 日付タイプ | Issued | |||||
