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Electron spin resonance study on the vanadium adsorption by persimmon tannin gel
http://hdl.handle.net/10458/991
http://hdl.handle.net/10458/991c5f2ee14-eb76-475c-8839-a9ca3275395d
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Tlanta-57-537-2002.pdf (173.9 kB)
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2007-12-05 | |||||
| タイトル | ||||||
| タイトル | Electron spin resonance study on the vanadium adsorption by persimmon tannin gel | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| キーワード | vanadium adsorption, persimmon tannin, vanadate ion, vanadyl ion, ESR | |||||
| 資源タイプ | ||||||
| 資源タイプ | journal article | |||||
| 著者 |
Nakajima, Akira
× Nakajima, Akira |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The persimmon tannin gel can adsorb vanadium highly effectively from aqueous solutions containing VOCl2 and NH4VO3, respectively. The adsorption of vanadium from the VOCl2 solution had a broad maximum at around pH 5 - 6, while that from the NH4VO3 solution, a sharp maximum at around pH 3.75 and a broad one at around pH 5 - 6. The adsorption of vanadium by the gel from both VOCl2 and NH4VO3 solutions was rapid, and was obeyed the Langmuir adsorption isotherm. The ESR spectrum of VO2+ in the persimmon tannin gel showed a typical powder pattern with g-anisotropy and anisotropic hyperfine structure （I = 7/2）, with g// = 1.937, g⊥ = 2.005, |A//| = 552 MHz, and |A⊥| = 168 MHz, suggesting a square pyramidal coordination structure of VO2+-persimmon tannin complex. The ESR analysis of vanadium adsorption from the NH4VO3 solution （pH 6） indicated the reduction of VO3- to VO2+. The high vanadium-adsorption ability of the persimmon tannin gel from the VOCl2 solution was attributed to the stable complex formation of VO2+ with catechol and pyrogallol groups in the gel, while the vanadium adsorption from the NH4VO3 solution can be explained as the combination of H3VO4 and VO2+ adsorptions. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://www.elsevier.com/wps/find/journaldescription.cws_home/525438/description | |||||
| 言語 | en | |||||
| 書誌情報 |
en : Talanta en : Talanta : The International Journal of Pure and Applied Analytical Chemistry 巻 57, 号 3, p. 537-544, 発行日 2002-05-24 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00399140 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00856594 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
