Solvent Extraction of Arsenic(V) with Dispersed Ultrafine Magnetite Particles.
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- WAKUI Yoshito
- National Institute of Advanced Industrial Science and Technology (AIST)
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- EBINA Takeo
- National Institute of Advanced Industrial Science and Technology (AIST)
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- MATSUNAGA Hideyuki
- National Institute of Advanced Industrial Science and Technology (AIST)
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- SUZUKI Toshishige M.
- National Institute of Advanced Industrial Science and Technology (AIST)
書誌事項
- タイトル別名
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- Solvent Extraction of Arsenic 5 with Dispersed Ultrafine Magnetite Particles
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説明
The solvent extraction of arsenic(V) was investigated using heptane containing ultrafine magnetite particles and hydrophobic ammonium salt. Arsenic(V) was favorably extracted from aqueous solutions of pH ranging over 2 - 7, where the distribution ratio (103) was independent of the pH. Although the addition of alkyl ammonium salt improved the phase separation, no notable influence was observed on the extraction of arsenic(V). Oleic acid suppressed the distribution ratio of arsenic(V) when the concentration exceeded 10-2 M. Sulfate did not interfere with the extraction, while the presence of more than 10-3 M phosphate decreased the distribution ratio. Metal cations including calcium(II), manganese(II), cobalt(II), nickel(II), copper(II), zinc(II) and lanthanum(III) did not give any serious interference up to the 10-4 M level. According to equilibrium and kinetic studies, the extraction of arsenic(V) can be interpreted by the adsorption of H2AsO4- onto the surface of dispersed magnetite particles. The relationship between the amount of arsenic(V) extracted in the organic phase and that remaining in an aqueous phase followed a Langmuir-type equilibrium equation. The maximum uptake capacity was determined to be 4.8 × 10-4 mol/g-magnetite (36 mg As/g). The arsenic(V) extracted in the organic phase was quantitatively recovered by back-extraction with an alkaline solution.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 18 (7), 793-798, 2002
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679232826368
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- NII論文ID
- 10011312136
- 30013460306
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD38XlsVGmsLg%3D
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 6220333
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- PubMed
- 12137375
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- NDLサーチ
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- PubMed
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- 使用不可