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Using a sequential extraction procedure for selective determination of soil-adsorbed Se
https://repo.qst.go.jp/records/53673
https://repo.qst.go.jp/records/536736b0239f6-014e-4b36-9d7b-24c33313fbaa
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-06-05 | |||||
| タイトル | ||||||
| タイトル | Using a sequential extraction procedure for selective determination of soil-adsorbed Se | |||||
| 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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× Tagami, Keiko× Uchida, Shigeo× 中丸 康夫× 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 | To understand Se adsorption behavior in acid soils, soil/soil solution distribution coefficient (Kd) was obtained for 58 Japanese agricultural soil samples using Se-75 as a tracer. It was found that the Kd-Se values, ranged from 12 to 1060 (arithmetic mean =315), were highly correlated to the soil active-aluminum (Al) and active-iron (Fe) contents. Those two components were considered to be the major adsorbents of Se in Japanese soils. The mechanism of Se adsorption by the active-Al and active-Fe is regarded to be ligand-exchange, which is the same adsorption mechanism for phosphorus (P). Therefore, using a modified sequential extraction procedure proposed for soil adsorbed P, the adsorbed Se-75 was extracted from 12 selected soil samples. In this procedure, we employed 1 mol/L NH4Cl, 4 mol/L NH4F and 0.1 mol/L NaOH for extracting loosely bound Se, active-Al bound Se and active-Fe bound Se, respectively. The results showed that 80-100% of the adsorbed Se was recovered as active-Al and active-Fe bound forms. The loosely bound Se was less than 2% of the total amount of Se sorbed on each soil. The active-Al bound Se was the dominant form in the soils that had higher Kd values, while the active-Fe bound Se was the dominant form in the soils that had lower Kd values. Therefore, we considered that the higher values of Kd-Se were mainly caused by the sorption on active-Al. | |||||
| 書誌情報 |
Waste Management Symposium Proceedings 巻 30, p. 1-7, 発行日 2004-05 |
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