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Thorium and uranium concentrations in 44 Japanese river waters -Possible uranium addition from agricultural fields to river waters-
https://repo.qst.go.jp/records/69498
https://repo.qst.go.jp/records/69498c4b44c09-3641-47b1-99d6-48b816cb2da2
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-10-06 | |||||
| タイトル | ||||||
| タイトル | Thorium and uranium concentrations in 44 Japanese river waters -Possible uranium addition from agricultural fields to river waters- | |||||
| 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 | Due to the application of phosphatic fertilizers to agricultural fields, river concentrations of uranium (U) may increase since any excess amounts of their irrigation water are returned to rivers. The U and thorium (Th) concentration ratio is of interest to check for possible U addition from agricultural fields. Thus water samples at the upper stream, the middle part (usually surrounded by agricultural fields), and the lower stream from each of 44 major Japanese rivers were collected and their U and Th concentrations were measured by inductively coupled plasma mass spectrometry. The geometric means of U/Th ratios in the upper stream, the middle part, and the lower stream were 1.38, 2.01 and 2.18 respectively. The results suggested possible U addition from the agricultural fields. | |||||
| 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 | HydroChange 2008 | |||||
| 発表年月日 | ||||||
| 日付 | 2008-10-03 | |||||
| 日付タイプ | Issued | |||||
