書誌事項
- タイトル別名
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- Comparison between Aluminum Hydroxide Coprecipitation and Adsorption for Removal of Dilute As(V) from Wastewater
- スイサンカブツ アルミニウム ニ ヨル キハク As V ガンユウ ハイスイ ショリ ニ オケル キョウチンホウ ト キュウチャクホウ ノ ヒカク
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The mechanism for removal of dilute As (V) by coprecipitation with aluminum hydroxide was investigated using sorption isotherms, X-ray diffraction (XRD) patterns, and zeta potential analysis. The results from the coprecipitation experiments were compared with those from simple adsorption experiments. <BR>During simple adsorption of As (V) on aluminum hydroxide, the sorption density obeyed a Langmuir-type isotherm. XRD patterns of the adsorbed As (V) were independent of the mass adsorbed. The relationship between zeta potential and sorption density was linear. These results suggest that As (V) was removed mainly by surface complexation.<BR>In comparison, during As (V) co-precipitation with aluminum hydroxide, the sorption density followed a BET-type isotherm at pH 5 and 7, and there was a steep increase in sorption density at a transition point. XRD patterns and zeta potential analysis also supported the existence of a transition point during As (V) co-precipitation. The transition was from surface complexation to precipitation, and occurred when the initial molar ratio was As/Al=1.5. These results suggest that during coprecipitation As (V) is removed by surface complexation at molar ratios of As/Al ≤ 1.5, and by the formation of amorphous aluminum arsenate at As/Al ≥ 1.5.
収録刊行物
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- 資源と素材
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資源と素材 127 (2), 82-87, 2011
一般社団法人 資源・素材学会
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詳細情報 詳細情報について
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- CRID
- 1390282680252393088
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- NII論文ID
- 10027793181
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- NII書誌ID
- AA12188381
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- COI
- 1:CAS:528:DC%2BC3MXkslOjtrs%3D
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- ISSN
- 18840450
- 18816118
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- NDL書誌ID
- 10994489
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可