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Geochemical behavior of uraniumand thoriumin sand and sandy soil samples from a natural high background radiation area of the Odisha coast, India
https://repo.qst.go.jp/records/80263
https://repo.qst.go.jp/records/802630b96df4a-17d9-4808-bf25-fa7383fa2d6d
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-08-03 | |||||
| タイトル | ||||||
| タイトル | Geochemical behavior of uraniumand thoriumin sand and sandy soil samples from a natural high background radiation area of the Odisha coast, India | |||||
| 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 |
Veerasamy, Nimelan
× Veerasamy, Nimelan× Kumar Sahoo, Sarata× Inoue, Kazumasa× Arae, Hideki× Fukushi, Masahiro× Nimelan, Veerasamy× Sahoo, Sarata× Hideki, Arae |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Owing to their natural radioactivity, uranium (U) and thorium (Th) play significant roles in environmental sciences for monitoring radiation dose and in geological sciences for understanding sedimentary processes. The Odisha coastal area, in eastern India, is a well-known high background radiation area that is rich in monazites and rutile. This area was selected to study geochemical characteristics of U and Th in sand and sandy soil samples. The concentrations of U and Th were measured using inductively coupled plasma mass spectrometry (ICP-MS). The median, geometric mean, and standard deviation for U were determined to be 6, 4.5, and 2.5 μg/g and for Th were 186, 123.3, and 3.1 μg/g, respectively. Major element concentrations were evaluated using X-ray fluorescence spectroscopy to get the mineralogical composition and state of chemical weathering. The ratios of Th/U and Th/K varied from 4 to 37 and from 13 to 1058, respectively. These results clearly indicate that the samples from the coastal region were formed in an oxidizing and intense chemical weathering terrestrial environment with an enrichment of radiogenic heavy minerals (monazites and zircon) and clay mineral association. Since the majority of the samples have undergone moderate to intense weathering in the oxidizing environment, U is leached from the soil and sand matrix. Eventually, Th resides in the matrix and becomes a major source for radiation exposure in the environment. The high ratios of Th/U, along with the strong positive correlation between Th and P2O5, evidence the enrichment of the Th-bearing radioactive mineral, monazite, in these samples. |
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| 書誌情報 |
Environmental Science and Pollution Research 巻 27, 号 25, p. 31339-31349, 発行日 2020-06 |
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| 出版者 | ||||||
| 出版者 | Springer Nature | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0944-1344 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1007/s11356-020-09370-3 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://link.springer.com/article/10.1007/s11356-020-09370-3 | |||||
