绿锈 (化合物)

绿锈(英语:Green rust)是一类含铁(II)、铁(III)混合价态氢氧化物的绿色晶体的总称。这类晶体中,除了Fe2+、Fe3+和OH外,还有可能有CO2−
3
Cl
SO2−
4
等阴离子在其層狀雙氫氧化合物结构中,研究最多的物种有:[1]

  • 绿锈碳酸盐 - GR(CO2−
    3
    ):[Fe2+
    4
    Fe3+
    2
    (HO
    )12]2+ · [CO2−
    3
    ·2H
    2
    O
    ]2−.[2][3][4][5]
  • 绿锈盐酸盐 - GR(Cl
    ):[Fe2+
    3
    Fe3+
    (HO
    )8]+ · [Cl
    ·nH
    2
    O
    ].[4][5][6]
  • 绿锈硫酸盐 - GR(SO2−
    4
    ):[Fe2+
    4
    Fe3+
    2
    (HO
    )12]2+ · [SO2−
    4
    ·2H
    2
    O
    ]2−.[5][7][8]
硫酸亚铁溶液和氢氧化钠溶液在空气中反应,生成浅绿色的沉淀

其它文献中还有这些阴离子的报道:Br
[7]F
[7]I
[9]NO
3
[10]SeO2−
4
[11]

绿锈最初在的表面被发现。[2]它在自然界中也能以该矿物的形式存在。[1]

制备

绿锈可由含Fe(II)的溶液在SO42-、CO32-或Cl-等离子的存在下,用氧化剂(如空气过氧化氢等)氧化,再用NaOH沉淀得到。[12]

用途

绿锈可用于一些有机物的降解。[13]

参考文献

  1. ^ 1.0 1.1 J.-M. R. Génin, Ph. Refait, L. Simon, and S. H. Drissi (1998): "Preparation and Eh-pH diagrams of Fe(II)-Fe(III) green rust compounds; hyperfine interaction characteristics and stoichiometry of hydroxy-chloride, -sulphate and –carbonate". Hyperfine Interactions, volume 111, pages 313-318. doi:10.1023/A:1012638724990
  2. ^ 2.0 2.1 P. P. Stampfl (1969): "Ein basisches Eisen II-III Karbonat in Rost. Corrosion Science 9, pages 185-187.
  3. ^ Hans C. B. Hansen (1989): "Composition, stabilization, and light absorption of Fe(II)Fe(III) hydroxy-carbonate ('green rust')". Clay Minerals, volume 24, pages 663-669. doi:10.1180/claymin.1989.024.4.08
  4. ^ 4.0 4.1 M. Abdelmoula, Ph. Refait, S. H. Drissi, J. P. Mihe, and J.-M. R. Génin (1996): "Conversion electron Mössbauer spectroscopy and X-ray diffraction studies of the formation of carbonate-containing green rust one by corrosion of metallic iron in NaHCO3 and (NaHCO3 + NaCl) solutions". Corrosion Science, volume 38, pages 623-633. doi:10.1016/0010-938X(95)00153-B
  5. ^ 5.0 5.1 5.2 M. Abdelmoula, F. Trolard, G. Bourrié and J.-M. R. Génin (1998): "Evidence of the Fe(II)–Fe(III) green rust `fougerite' mineral occurrence in a hydromorphic soil and its transformation with depth". Hyperfine Interactions, volume 111, pages 231-238. doi:10.1023/A:1010802508927
  6. ^ W. Feitknecht and G. Keller (1950): "Über die dunkelgrünen Hydroxyverbindungen des Eisens". Zeitschrift für anorganische und allgemeine Chemie, volume 262, pages 61-68. doi: 10.1002/zaac.19502620110
  7. ^ 7.0 7.1 7.2 J. D. Bernal, D. R. Dasgupta, and A. L. Mackay (1959): "The oxides and hydroxides of iron and their structural inter-relationships". Clay Minerals Bulletin, volume 4, pages 15-30. doi:10.1180/claymin.1959.004.21.02
  8. ^ J.-M. R. Génin, A. A. Olowe, B. Resiak, N. D. Benbouzid-Rollet, M. Confente and D. Prieur (1993): "Identification of sulphated green rust 2 compound produced as a result of microbially induced corrosion of steel sheet piles in harbour". In Marine Corrosion of Stainless Steels: Chlorination and Microbial Effects, European Federation Corrosion Series, The Institute of Materials, London; volume 10, pages 162-166.
  9. ^ L. Vins, J. Subrt, V. Zapletal, and F. Hanousek (1987): "Preparation and properties of green rust type substances". Collect. Czech. Chem. Comm. volume 52, pages 93-102.
  10. ^ J. R. Gancedo, M. L. Martinez, and J. M. Oton (1983): "Formación de 'herrumbre verde' en soluciones de NH4NO3" (= "Formation of green rust in NH4NO3 solutions"). Anales de Química, Série A, volume 79, pages 470-472.
  11. ^ P Refait, L Simon, J-M R Génin. Reduction of SeO42- Anions and Anoxic Formation of Iron(II)−Iron(III) Hydroxy-Selenate Green Rust. Environ. Sci. Technol., 2000, 34 (5), pp 819–825 DOI: 10.1021/es990376g
  12. ^ 陈英, 吴德礼, 张亚雷 等. 绿锈的结构特征与反应活性页面存档备份,存于互联网档案馆)[J]. 化工学报, 2014
  13. ^ 徐楠楠,阮秀秀. 有机绿锈对水体有机污染物的降解去除. 全国环境化学学术大会, 2013