Influence of silicate ions on the formation of goethite from green rust in aqueous solution

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• 作者：Sang-Koo Kwon ; Ken’ ; ichi Kimijima ; Kiyoshi Kanie ; Shigeru Suzuki ; Atsushi Muramatsu ; Masatoshi Saito ; Kozo Shinoda ; Yoshio Waseda
• 关键词：A. Iron ; A. Steel ; B. XRD ; C. Atmospheric corrosion ; C. Rust
• 刊名：Corrosion Science
• 出版年：2007
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：July 2007
• 卷：49
• 期：7
• 页码：2946-2961
• 文件大小：1675 K

摘要

We investigated the influence of silicate ions on the formation of goethite converted from hydroxysulphate green rust, which was synthesized by neutralizing mixted solution of Fe₂(SO₄)₃ and FeSO₄ with NaOH solution, by O₂ in an aqueous solution. The pH and oxidation–reduction potential of the suspension and the Fe and Si concentrations in supernatant solutions were analyzed. X-ray diffraction results for the solid particles formed during the conversion were consistent with the results of the solution analyses. The results indicated that silicate ions suppressed the conversion from green rust to α-FeOOH and distorted the linkages of FeO₆ octahedral units in the α-FeOOH structure.