| 不同浓度Fe-H2O体系的溶解组分
优势区域图和Pourbaix图 |
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| 引用本文： | 黄旺银,桑世华,饶胡敏.不同浓度Fe-H2O体系的溶解组分
优势区域图和Pourbaix图[J].无机盐工业,2016,48(2):13. |
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| 作者姓名： | 黄旺银 桑世华 饶胡敏 |
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| 作者单位： | 1.成都理工大学材料与化学化工学院，四川成都 610059；2.四川省地质工程勘察院 |
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| 摘 要： | 对25 ℃、总铁浓度分别为1.0×10-2 mol/L和1.0×10-5 mol/L时的Fe-H2O体系可能存在的组分做了热力学和电化学分析，计算了各溶解组分的浓度，运用浓度比较法为判据，确定液相和液相、液相和固相以及各固相之间的分界线，绘制了不同浓度时Fe-H2O体系溶解组分的优势区域图和Pourbaix图。对比发现，在一定的温度和压力下，总铁浓度对Fe3+、Fe（OH）2+、HFeO2和FeO2-的优势区域影响不大，但对Fe2+、HFeO2-、Fe（OH）+的优势区域影响明显。随着总铁浓度的减小和碱化程度的逐步加强，Fe（OH）2和Fe3O4会发生一系列复杂的质子化作用。总铁浓度越高，多核组分Fe（s）、Fe3O4（s）、Fe（OH）2（s）和FeOOH（s）的稳定区域越大，性质越稳定。
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| 关 键 词： | 不同浓度 Fe-H2O体系 优势区域图 Pourbaix图 浓度比较法 |
Predominance diagram and Pourbaix diagram of dissolved species of
Fe-H2O system at different iron concentrations |
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| HUANG Wang-Yin,SANG Shi-Hua,RAO Hu-Min.Predominance diagram and Pourbaix diagram of dissolved species of
Fe-H2O system at different iron concentrations[J].Inorganic Chemicals Industry,2016,48(2):13. |
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| Authors: | HUANG Wang-Yin SANG Shi-Hua RAO Hu-Min |
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| Affiliation: | 1.College of Materials and Chemistry & Chemical Engineering，Chengdu University of Technology，
Chengdu 610059，China；2.Sichuan Institute of Geological Engineering Investigation |
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| Abstract: | The predominance diagram and Pourbaix diagram of dissolved species of the Fe-H2O system with different iron concentrations were studied at 25 ℃ by a concentration comparison method.The concentration of dissolved species，border-
lines for liquid phases or solid phases and borderlines between the liquid and solid phase were calculated on the basis of thermodynamic analysis and electrochemical analysis with total Fe concentrations of 1.0×10-2 mol/L and 1.0×10-5 mol/L.The predominance diagram of dissolved species and the Pourbaix diagram of the Fe-H2O system were then plotted.Comparisons made between predominance diagrams for different iron concentrations showed that at a specific temperature and pressure the total concentration of iron had little effect on the stable predominance regions of Fe3+，Fe（OH）2+， HFeO2， and FeO2-.But these conditions had a remarkable effect on Fe2+，HFeO2-，and Fe（OH）+.A series of hydroxylation reactions may occur with Fe（OH）2
and Fe3O4 with the decreasing of the total iron concentration and with the enhancement of basification. A higher total concen-
tration of iron will result in a larger stable area and a more stable quality of Fe（s），Fe3O4（s），Fe（OH）2（s），and FeOOH（s）. |
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| Keywords: | different iron concentration Fe-H2O system predominance diagram Pourbaix diagram concentration comparison method |
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