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Soil-soil solution partitioning coefficient of Mn-54 in Japanese agricultural fields
https://repo.qst.go.jp/records/71892
https://repo.qst.go.jp/records/7189246303d7c-6c3b-4f02-a9cb-87975b1742d8
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-12-21 | |||||
| タイトル | ||||||
| タイトル | Soil-soil solution partitioning coefficient of Mn-54 in Japanese agricultural fields | |||||
| 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 |
Uchida, Shigeo
× Uchida, Shigeo× Tagami, Keiko× Ishikawa, Nao× 内田 滋夫× 田上 恵子× 石川 奈緒 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Manganese, an essential nutrient to plants, is observed to be deficient in some neutral and alkaline soils, while plants grown on some acid soils absorb the element to toxic levels. The uptake mechanisms through roots are well studied and the form is Mn(II). Thus the estimation of bioavailable Mn fraction is of important where deficient/excess Mn soil was observed. From radioactive waste management view point, Mn is of interest because radioactive Mn-54 (half-life: 312.1 d) is produced by neutron activation of iron in a nuclear power plant. When the radionuclide released to the environment, it is probable to be taken up by plants from soil. Therefore, it is necessary to provide environmental parameter for radiation dose assessment especially considering plant available form Mn, that is Mn(II). In this study, soil-soil solution partitioning coefficients (Kds) of Mn-54 were measured using 63 soil samples collected from rice paddy fields throughout Japan. Air-dried and sieved (<2 mm) soil samples were used; a 3-g of soil was transferred into a polypropylene bottle (50 mL) and 30 mL of Milli-Q water was added. After one day mixing in a shaker, the mixture was added with a known amount of Mn-54 and shook for 7 more days. The supernatant was taken and passed through a 0.45-µm filter then measured the radioactivity with an NaI(Tl) scintillation counter. The Kds were obtained by concentration of Mn-54 in soil (Bq/g) divided by that in soil solution (Bq/mL). The Kd values ranged from 140-140000; these data were used for statistical analysis to see the correlations between stable Mn concentrations in rice grain, soil and soil solutions. This work has been partially supported by the Agency for Natural Resources and Energy, the Ministry of Economy, Trade and Industry (METI), Japan. |
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| 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 | PACIFICHEM 2015 | |||||
| 発表年月日 | ||||||
| 日付 | 2015-12-18 | |||||
| 日付タイプ | Issued | |||||
