Comparison study on transformation of iron oxyhydroxides: Based on theoretical and experimental data |
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| Authors: | Bin Lu Hui Guo Hui Liu Yu Wei Denglu Hou |
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| Institution: | a College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China
b College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016, China |
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| Abstract: | We have investigated the catalytic transformation of ferrihydrite, feroxyhyte, and lepidocrocite in the presence of Fe(II). In this paper, the transformation from akaganeite and goethite to hematite in the presence of trace Fe(II) was studied in detail. The result indicates that trace Fe(II) can accelerate the transformation of akaganeite and goethite. Compared with the transformation of other iron oxyhydroxides (e.g., ferrihydrite, feroxyhyte, lepidocrocite, and akaganeite), a complete transformation from goethite to hematite was not observed in the presence of Fe(II). On the basis of our earlier and present experimental results, the transformation of various iron oxyhydroxides was compared based on their thermodynamic stability, crystalline structure, transformation mechanism, and transformation time. |
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| Keywords: | Iron oxyhydroxides Hematite Transformation mechanism Structural relationships |
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