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Effect of acetate on ferrihydrite crystallization

  • Structure And Chemical Bonding
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Abstract

Mössbauer spectroscopy was used to follow the aging of ferrihydrite with different amounts of acetate, to achieve more crystalline products. Mössbauer spectra of fresh samples did not show any magnetic components. After two years aging, the solids presented crystalline fractions. Hematite formation was inhibited as acetate content increased in solids. For an acetate/iron molar ratio equal to 0.63 goethite was formed instead of hematite. X-ray diffraction confirmed these results. This work shows that synthetic samples can be used for elucidating the “anti-hematitic” effect of organic matter already detected in soils.

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Authors and Affiliations

  1. Instituto de Química, Universidade Federal da Bahia, 40210, Salvador, Ba., Brazil

    Maria do Carmo Rangel Varela

  2. Departamento de Química, Universidade Federal de Minas Gerais, 31270, Belo Horizonte, MG, Brazil

    Milton Francisco de Jesus Filho

  3. Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13081, Campinas, SP, Brazil

    Fernando Galembeck

Authors
  1. Maria do Carmo Rangel Varela
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  2. Milton Francisco de Jesus Filho
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  3. Fernando Galembeck
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Varela, M.d.C.R., Filho, M.F.d.J. & Galembeck, F. Effect of acetate on ferrihydrite crystallization. Hyperfine Interact 83, 159–167 (1994). https://doi.org/10.1007/BF02074267

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