Comparative study on the mössbauer parameters of iron humates and polyuronates

B. Lakatos, L. Korecz, J. Meisel

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The Mössbauer parameters of Fe(II)-humates point to the formation of inner-sphere chelate type complexes, whereas those of Fe(II)-polyuronates (pectates and alginates) suggest outer-sphere complexes which is in accord with the EPR (electron paramagnetic resonance) studies of their 3d-transition metal complexes. The following ligands must be taken into consideration: carboxylate and phenolic or alcoholic hydroxyl groups, nitrogen atoms and in hydrated states water molecules, resulting in various Fe(II)-species with different coordinations. In the case of Fe(III)-fulvate, a polynuclear structure may be assumed.

Original languageEnglish
Pages (from-to)149-157
Number of pages9
Issue number2
Publication statusPublished - Oct 1977


ASJC Scopus subject areas

  • Soil Science

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