Adsorption Behavior of Arsenic(III) and Arsenic(V) Using Magnetite
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概要
- 論文の詳細を見る
In order to investigate the adsorptive properties for As(III) and As(V) at 303 K, the magnetite was prepared by adding the aqueous sodium hydroxide solution to the mixture solution of Fe2+:Fe3+ = 1:2 using iron chloride. The adsorption of As(III) and As(V) was dependent on equilibrium pH and showed a maximum value at pH 6 and 5, respectively. From their chemical species existing at each pH and the pH of the zero point of charge of the magnetite surface, As(V) was probably adsorbed on the surface of the magnetite through the electrostatic force, while the adsorption of As(III) was different from that of As(V). It is probable that As(III) was absorbed through an ester reaction on the magnetite. The adsorption capacities of As(III) and As(V) were 2.77 × 10–1 mmol·g–1 and 2.28 × 10–1 mmol·g–1, respectively. The adsorption equilibrium constants for As(III) and As(V) were 4.74 dm3·mmol–1 and 12.1 dm3·mmol–1, respectively, suggesting that the magnetite has higher affinity to As(V). An aqueous sodium hydroxide solution was useful as an eluent for desorption of As(III) and As(V).
- 社団法人 化学工学会の論文
- 2005-08-01
著者
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Baba Yoshinari
Department Of Applied Chemistry University Of Miyazaki
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Oshima Tatsuya
Department of Applied Chemistry, University of Miyazaki
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Ohe Kaoru
Department of Applied Chemistry, University of Miyazaki
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NAKAMURA Shigeo
Faculty of Pharmaceutical Sciences, Kyoritsu College of Pharmacy
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TAGAI Yasuyuki
Department of Applied Chemistry, University of Miyazaki
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Ohshima Tatsuya
Department Of Applied Chemistry University Of Miyazaki
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Oshima Tatsuya
Univ. Miyazaki Miyazaki Jpn
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Oshima Tatsuya
Department Of Applied Chemistry Faculty Of Science And Engineering Saga University
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Ohe Kaoru
Department Of Applied Chemistry University Of Miyazaki
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Ohe K
Department Of Applied Chemistry Miyazaki University
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Ohe Kaoru
Department Of Applied Chemistry Faculty Of Engineering Miyazaki University
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Nakamura Shigeo
Faculty Of Pharmaceutical Sciences Kyoritsu University Of Pharmacy
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Tagai Yasuyuki
Department Of Applied Chemistry University Of Miyazaki
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Baba Yoshinari
Department Of Applied Chemistry Faculty Of Engineering Miyazaki University
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