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Sorption behavior of selenium on humic acid under increasing Se or humic acid content
https://repo.qst.go.jp/records/68599
https://repo.qst.go.jp/records/685992028c5bb-e48f-4f08-8baf-c079f3eaa445
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-07-24 | |||||
| タイトル | ||||||
| タイトル | Sorption behavior of selenium on humic acid under increasing Se or humic acid content | |||||
| 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 |
Ishikawa, Nao
× Ishikawa, Nao× Uchida, Shigeo× Tagami, Keiko× Nakamaru, Yasuo× 石川 奈緒× 内田 滋夫× 田上 恵子× 中丸 康夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Selenium (Se) is one of the elements that are included in environmental quality standards for soils because it is highly toxic to humans. Although natural Japanese soils do not have a high Se content, Se contamination of soils will become a big problem because its consumption for industrial purposes is increasing. From the viewpoint of radioactive waste management, the fate of the element in a soil environment is also interesting because the long-lived fission product Se-79 (half-life: 1.1 million y) is an important radionuclide for long-term dose assessment. Soil organic substances influence pollutant sorption on soil. Recently, many studies have shown that humic acid (HA), a soil organic substance, adsorbs some radioactive elements, such as U and Am. However, no study has been carried out for Se adsorbability onto HA or for the sorption kinetics. Thus, our aim in this study was to clarify the sorption behavior of Se on HA. We investigated influences of solid-liquid ratios and Se concentrations by measuring the amount of Se sorbed on HA and the time to reach the sorption equilibrium. We also determined size distributions of HA-sorbed-Se under increasing HA amounts and co-existing Se amounts using an ultrafiltration technique. Finally, we looked at a suitable determination method for Se concentration in the liquid phase to obtain an isotherm equation. | |||||
| 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 | 18th World Congress of Soil Science | |||||
| 発表年月日 | ||||||
| 日付 | 2006-07-15 | |||||
| 日付タイプ | Issued | |||||
