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Fluoride removal in aluminum coexisting solution by hydrated dolomite
http://hdl.handle.net/10458/6900
http://hdl.handle.net/10458/690051940def-b281-4777-82ac-23931dd5a93f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
本文 (1.4 MB)
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| Item type | その他 / Others(1) | |||||
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| 公開日 | 2020-06-22 | |||||
| タイトル | ||||||
| タイトル | Fluoride removal in aluminum coexisting solution by hydrated dolomite | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | fluoride, hydrated dolomite, co-precipitation, LDH, ion-exchange | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_1843 | |||||
| 資源タイプ | other | |||||
| 著者 |
Myint, Myint Khin
× Myint, Myint Khin× Yagisawa, Makoto× Giuseppe, Granata× Tamura, Toshitaka× Hoshi, Tomohiro× Tokoro, Chiharu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this work, we elucidated the role of hydrated dolomite as a neutralizing agent in the removal of fluoride by co-precipitation with Al（OH）3. The hydrated dolomite used in this work contained 60% Ca（OH）2 and 40% Mg（OH）2. We investigated the effect of pH （8.9）, Al（OH）3 and hydrated dolomite dosages on removal performances and removal mechanism. In the removal experiments with hydrated dolomite as neutralizing agent, a higher fluoride removal was obtained under all investigated conditions. The highest fluoride removal was observed at pH 8. At this pH, the fluoride concentration decreased from the initial 15 mg/dm^3 to 8 mg/dm^3 by dosing 20 mg/dm^3 of aluminum. The removal of fluoride was found to be only slightly dependent on the dolomite concentration in the investigated range. In the removal experiments with NaOH, the XRD spectra of the residual solids exhibited only the broad peaks of Al（OH）3, thus suggesting that the fluoride removal occurred through adsorption onto Al（OH）3. By using hydrated dolomite, the XRD spectra highlighted the presence of the Mg-Al -LDH structure. The obtained results suggest that the higher removal capacity in the presence of hydrated dolomite was due to the promotion of additional removal mechanisms, such as fluoride adsorption onto LDH and/or ion-exchange with the LDH anions. | |||||
| 言語 | en | |||||
| 書誌情報 |
en : 5th International Arsenic Symposium in MIYAZAKI 2018 p. 90-93, 発行日 2018-06 |
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| 出版者 | ||||||
| 出版者 | University of Miyazaki, IRISH | |||||
| 言語 | en | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
