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Dielectric spectroscopy of aqueous solutions of fulvic acids

  • Session 1: Isolation, Fractionation, And Characterization
  • Conference paper
  • First Online:
Humic Substances in the Aquatic and Terrestrial Environment

Part of the book series: Lecture Notes in Earth Sciences ((LNEARTH,volume 33))

  • 135 Accesses

Abstract

The complex dielectric spectrum of aqueous solutions (10% w/w) of fulvic and polymaleic acids has been measured at various frequencies between 1 MHz and 40 GHz. Similar to pure water a dispersion/dielectric loss region emerges in the range above 1 GHz. The measured spectra have been analytically represented by the empirical Cole-Cole relaxation spectral function to yield values for the extrapolated high- and low-frequency permittivity, the principal dielectric relaxation time, the relaxation time distribution parameter and the specific electric d.c. conductivity. In correspondence with aqueous solutions of synthetic organic molecules, the low-frequency permittivity of the fulvic acid/water mixtures is reduced, and the principal dielectric relaxation time is enhanced with respect to the pure water value. As with solutions of polyacrylic acid no solute contributions to the real part of the dielectric spectrum are found.

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Authors and Affiliations

  1. Instituto de Recursos Naturales y Agrobiologica, C.S.I.C., Apartado 1052, E-41080, Sevilla, Spain

    Francisco J. Gonzalez-Vila & Francisco Martin

  2. Drittes Physikalisches Institut, Universität Göttingen, Bürgerstrasse 42-44, D-3400, Gottingen, Germany

    Udo Kaatze & Reinhard Pottel

  3. Fachbereich 8, Universität-Gesamthochschule Siegen, Postfach 101240, D-5900, Siegen, Germany

    Harro Lentz

Authors
  1. Francisco J. Gonzalez-Vila
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  2. Udo Kaatze
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  3. Harro Lentz
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  4. Francisco Martin
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  5. Reinhard Pottel
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Editor information

Bert Allard Hans Borén Anders Grimvall

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© 1991 Springer-Verlag

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Gonzalez-Vila, F.J., Kaatze, U., Lentz, H., Martin, F., Pottel, R. (1991). Dielectric spectroscopy of aqueous solutions of fulvic acids. In: Allard, B., Borén, H., Grimvall, A. (eds) Humic Substances in the Aquatic and Terrestrial Environment. Lecture Notes in Earth Sciences, vol 33. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0010459

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  • DOI: https://doi.org/10.1007/BFb0010459

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-53702-1

  • Online ISBN: 978-3-540-46985-8

  • eBook Packages: Springer Book Archive

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