WEKO3
アイテム
Vertical distributions of Plutonium and 137Cs in lacustrine sediments in northwestern China: quantifying sediment accumulation rates and source identifications
https://repo.qst.go.jp/records/45784
https://repo.qst.go.jp/records/457844235d883-8254-4b16-9f3e-eb028f7dd829
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-04-13 | |||||
| タイトル | ||||||
| タイトル | Vertical distributions of Plutonium and 137Cs in lacustrine sediments in northwestern China: quantifying sediment accumulation rates and source identifications | |||||
| 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 |
Wu, Fengchang
× Wu, Fengchang× Zheng, Jian× Liao, Haiqing× Yamada, Masatoshi× 鄭 建× Ｌｉａｏ Ｈａｉｑｉｎｇ× 山田 正俊 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigated the vertical distributions of 239+240Pu and 137Cs activities and 240Pu/239Pu atom ratios in two lakes in northwestern China. The 240Pu/239Pu atom ratio from the Chinese nuclear test (CNT) site at Lop Nor is too complicated to identify the regional fallout source. However, radionuclides from the test site may be resolved mainly by the vertical distribution of radionuclides because there is no overlap between the global fallout peak and the local fallout peak. We analyzed Pu isotopes and 137Cs in sediments from two lakes (Sugan and Shuangta) located in northwestern China, near the CNT, and Lake Sihailongwan located in northeastern China to date recent lacustrine sediments and resolve global/local fallout sources. The apparently low 240Pu/239Pu atom ratio of 0.103+/-0.010 at Lake Sugan was likely representative of the fallout from the Lop Nor site. Our results also demonstrated that the 239+240Pu activity was more useful for recent chronology of lacustrine sediments, compared to 137Cs. Sediment accumulation rates of 0.651, 0.058 - 0.061, and 0.015 g/cm2/a-1 for sediment cores of Lake Shuangta, Lake Sugan and Lake Sihailongwan, respectively, were obtained by using the 239+240Pu fallout peak as a discrete time marker for 1964. The respective contributions of 137Cs and 239+240Pu from the CNT were estimated to be about 40% and 27% for Lake Sugan and 36% and 20% for Lake Shuangta. Plutonium isotopes in lacustrine sediments were proven to be useful for quantifying sediment accumulation rates and for source identification of the radioactive contamination. | |||||
| 書誌情報 |
Environmental Science & Technology 巻 44, 号 8, p. 2911-2917, 発行日 2010-03 |
|||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0013-936X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1021/es9029649 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://pubs.acs.org | |||||
| 関連名称 | http://pubs.acs.org | |||||
