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Distribution coefficients (Kd) of strontium and significance of oxides and organic matter in controlling its partitioning in coastal regions of Japan
https://repo.qst.go.jp/records/47034
https://repo.qst.go.jp/records/4703414c8a2dd-c894-48c4-a695-1d88589249dd
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-02-04 | |||||
| タイトル | ||||||
| タイトル | Distribution coefficients (Kd) of strontium and significance of oxides and organic matter in controlling its partitioning in coastal regions of Japan | |||||
| 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 |
Takata, Hyoe
× Takata, Hyoe× Tagami, Keiko× Aono, Tatsuo× Uchida, Shigeo× 田上 恵子× 青野 辰雄× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The Fukushima Daiichi Nuclear Power Plant accident in March 2011 resulted in the release of large quantities of a long-lived radioactive strontium (i.e. 90Sr; half-life: 28.8 y) into the coastal areas of Japan. 90Sr released was dispersed and mixed into the water column, and will eventually be deposited into sediment. Because factors controlling seawater–sediment partitioning in the coastal marine environments are not fully understood, we developed seawater–sediment distribution coefficients, Kd (L/kg), for Sr and sediment obtained from 16 sites in coastal regions of Japan by means of sediment–water partitioning experiments. 85Sr was used as a radiotracer and conditions were designed to mimic the environmental of the sampling sites as closely as possible. Experimentally determined Kd values (Kd-ex) varied between 0.3 and 3.3 L/kg (mean, 1.4 L/kg), and the variation in Kd-ex was attributed to the percentage of Sr in the exchangeable fraction in the sediment. Kd-ex values were used, along with measured concentrations of 88Sr, a stable naturally occurring Sr isotope in seawater and sediment, to estimate the concentrations of exchangeable Sr in the sediment. Estimates ranged from 2.1 to 24.3μg/kg, or 1.3–15.7% of the total 88Sr concentration in the sediment. Significant correlations existed between the estimated concentrations of exchangeable Sr, and the organic matter and the oxide/hydrous oxide contents. When organic contents were greater than 0.38%, Sr binds to organic surface sites more strongly than to the other sites. Results indicate that binding of Sr to the surface of sedimentary particles was influenced by grain size, iron and manganese oxides, and organic matter. Furthermore, the information presented here could be useful to estimate Kd values for anthropogenic 90Sr in sediment in the coastal marine environment. | |||||
| 書誌情報 |
Science of the Total Environment 巻 490, p. 979-986, 発行日 2014-07 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0048-9697 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | doi:10.1016/j.scitotenv.2014.05.101 | |||||
