Atomic-scale Structure of Ferric Oxyhydroxide Formed from Fe-Si Alloy in Aqueous Solutions Containing Different Salts
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概要
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Quantitative X-ray structural analysis coupled with reverse Monte Carlo (RMC) simulation was performed for characterizing the atomic-scale structure of γ-FeOOH (lepidocrocite) particles. These particles were formed by dipping pure iron or Fe–2mass%Si alloy into aqueous solutions containing Na2SO4 or NaCl. The realistic atomic-scale structures of γ-FeOOH particles were estimated by fitting ordinary interference functions through the RMC simulation technique. The results revealed that the fundamental FeO6 octahedral structural units and their linkages were distorted in the γ-FeOOH particles formed from the Fe–Si alloy. This distortion was considered to be caused by the incorporation of silicate species into these particles. Transmission electron microscopy and Fourier-transform infrared (FT-IR) spectroscopy were employed for observing the morphology of the particles and for characterizing their bonding structure, respectively. Further, the amount of γ-FeOOH particles formed was measured in order to investigate their formation processes. The changes in the pH and oxidation-reduction potential (ORP) of the solutions were monitored during the formation of γ-FeOOH particles. Inductively coupled plasma analyses were also performed for determining the amounts of iron and silicon in supernatant solutions. The results indicated that the formation process of γ-FeOOH particles in the solutions was influenced by the addition of silicon to iron.
- 2006-08-15
著者
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Waseda Yoshio
Institute for Advanced Materials Processing, Tohoku University
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Waseda Y
Tohoku Univ. Sendai Jpn
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Waseda Y
Institute Of Multidisciplinary Research For Advanced Materials (imram) Tohoku University
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Waseda Yoshio
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Waseda Yoshio
Institute For Advanced Materials Processing (sozaiken) Tohoku University
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Waseda Yoshio
Inst. Of Multidisciplinary Res. For Advanced Materials Tohoku Univ.
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Inoue Katsuya
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Inoue Katsuya
Institute For Molecular Science And Grad. Univ. Advanced Studies
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Suzuki S
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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SUZUKI SHIGERU
Institute of Gastroenterology, Tokyo Women's Medical University
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Waseda Yoshio
Institute For Advanced Materials Proedding (amp) Tohoku University
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SAITO Masatoshi
School of Health Sciences, Faculty of Medicine, Niigata University
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KWON Sang-Koo
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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Inoue Katsuya
Inst. Of Multidisciplinary Res. For Advanced Materials Tohoku Univ.
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Saito Masatoshi
School Of Health Sciences Faculty Of Medicine Niigata University
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Waseda Y
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Kwon Sang-koo
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Kwon Sang‐koo
Tohoku Univ. Sendai Jpn
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Waseda Yoshio
Institute For Advanced Materials Processing
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Susuki Shigeru
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Saito Masatoshi
School Of Health Science Faculty Of Medicine Niigata University
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Suzuki Shigeru
Institute For Advanced Materials Processing Tohoku University
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Inoue Katsuya
Institute For Molecular Science
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