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Role of soil organic matter in the mobility of radiocesium in agricultural soils common in Japan
https://repo.qst.go.jp/records/44937
https://repo.qst.go.jp/records/449372398fe3d-7158-42e2-85ba-2eeead718ebc
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-08-10 | |||||
| タイトル | ||||||
| タイトル | Role of soil organic matter in the mobility of radiocesium in agricultural soils common in 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 |
Nakamaru, Yasuo
× Nakamaru, Yasuo× Ishikawa, Nao× Tagami, Keiko× Uchida, Shigeo× 中丸 康夫× 石川 奈緒× 田上 恵子× 内田 滋夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Cesium-137 is an important radionuclide because of its long radiological half-life (30 y) and high fission yield from 235U and 239Pu. In order to evaluate the radiation dose from 137Cs, it is important to know its mobility in different soils. Soil organic matter (SOM) might affect the 137Cs mobility because SOM is a reactive colloid. Therefore, tracer studies were carried out to clarify the effect of SOM on Cs mobility in different soils. Soil-soil solution distribution coefficients (Kds) of 137Cs were measured for 87 Japanese agricultural soil samples to evaluate the adsorbability of 137Cs. The soil samples were selected from three common and one miscellaneous soil groups in Japan. The percentage of SOM-bound 137Cs and the exchangeability of SOM-bound Cs were evaluated by selective extraction. To evaluate the effect of dissolved organic matter (DOM), which is a portion of the SOM fraction, on Cs mobility, the amount of 137Cs bound to DOM was also determined. The observed Kd values ranged from 215 to 43400 (L/kg) with a geometric mean of 2210 L/kg. Among the four soil groups, relatively low Kd values were observed for Andosol samples. Their high SOM content would possibly affect 137Cs mobility. Then the effect of SOM was verified for the four soil groups. The selective extraction showed that 3-17% of soil-adsorbed 137Cs was in an SOM-bound form. Moreover, it was observed that the 27-100% (average: 63%) of 137Cs adsorbed by the soil humic acid (HA) fraction was exchangeable. The effect of DOM in soil solution was also verified. About 5-82% (average: 45%) of 137Cs in soil solution was in HA-bound form. These results suggested that SOM could increase the mobility of 137Cs in soils by binding it in exchangeable and DOM-bound forms. |
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| 書誌情報 |
Colloids and Surfaces A : Physicochemical and Engineering Aspects 巻 306, 号 1/3, p. 111-117, 発行日 2007-08 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0927-7757 | |||||
