WEKO3
アイテム
Vertical Distributions of Radionuclides (239+240Pu, 240Pu/239Pu and 137Cs) in Sediment Cores of Lake Bosten in Northwestern China
https://repo.qst.go.jp/records/46797
https://repo.qst.go.jp/records/467975710f245-2c5f-478b-a181-9eccba01f2f3
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-07-29 | |||||
| タイトル | ||||||
| タイトル | Vertical Distributions of Radionuclides (239+240Pu, 240Pu/239Pu and 137Cs) in Sediment Cores of Lake Bosten in Northwestern China | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Ｌｉａｏ, Ｈａｉｑｉｎｇ
× Ｌｉａｏ, Ｈａｉｑｉｎｇ× ト, 文庭× 鄭, 建× et.al× Ｌｉａｏ Ｈａｉｑｉｎｇ× ト 文庭× 鄭 建 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Artificial radionuclides (137Cs, 239+240Pu, 241Pu, 241Am) deposited in lacustrine sediments have been used for dating as well as radionuclide source identification. In the present work, we investigated the vertical distributions of 239+240Pu and 137Cs activities, 240Pu/239Pu atom ratios and 239+240Pu/137Cs activity ratios in sediment cores collected from Lake Bosten, which is the lake closest to the Lop Nor Chinese Nuclear Weapon Test site in northwestern China. Uniformly high concentrations of 239+240Pu and 137Cs were found in the upper layers deposited since 1964 in the sediment cores, and these were controlled by the re-suspension of soil containing radionuclides from the nearby land surface. As the Chinese nuclear tests varied remarkably in yield, the mixing of the tropospheric deposition from these tests and the stratospheric deposition of global fallout has led to a 240Pu/239Pu atom ratio that is similar to that of global fallout and to a 239+240Pu/137Cs activity ratio that is slightly higher than that of global fallout. However, a low 240Pu/239Pu atom ratio of 0.080 and high 239+240Pu/137Cs activity ratio of 0.087, significantly different from the global fallout values, were observed in one sediment core (07BS10-2), indicating the inhomogenous tropospheric deposition from the Chinese nuclear tests in Lake Bosten during 1967-1973. These results are important to understand the influence of the CNTs on the radionuclide contamination in Lake Bosten. | |||||
| 書誌情報 |
Environmental Science & Technology 巻 48, 号 7, p. 3840-3846, 発行日 2014-04 |
|||||
| 出版者 | ||||||
| 出版者 | ACS Publishinos | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0013-936X | |||||
