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Mössbauer study of iron removal in a montmorillonite

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Abstract

57Fe Mössbauer spectroscopy in conjunction with atomic absorption spectrometry and X-ray powder differaction analyses have been used to study the iron present in a montmorillonite prior to and after different successive stages of two deferration processes. Fe3+ ions occupy mainly octahedrical M(2) sites in the mineral structure; no impurities of iron oxides were detected. The quite efficient deferration by HCl refluxing produced a substantial alteration of lamellar structure of montmorillonite, whilst dithionite/citrate treatment did not induce severe structural changes but had low iron removal efficiency.

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Authors and Affiliations

  1. Insto. de Quimica Fisica “Rocasolano”, CSIC, Serrano 119, Madrid

    M. Gracia, J. R. Gancedo & J. F. Marco

  2. Insto. de Catálisis y Petroleoquímica, CSIC, Serrano 119, Madrid

    M. J. Franco, S. Mendioroz & J. A. Pajares

Authors
  1. M. Gracia
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  2. J. R. Gancedo
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  3. J. F. Marco
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  4. M. J. Franco
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  5. S. Mendioroz
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  6. J. A. Pajares
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Gracia, M., Gancedo, J.R., Marco, J.F. et al. Mössbauer study of iron removal in a montmorillonite. Hyperfine Interact 46, 629–634 (1989). https://doi.org/10.1007/BF02398252

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