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Per Persson. Photo.

Per Persson

Director

Per Persson. Photo.

Highly mobile iron pool from a dissolution-readsorption process

Author

  • John S. Loring
  • Anna A. Simanova
  • Per Persson

Summary, in English

Oxalate (C(2)O(4)(2-)) acts synergistically on the dissolution of goethite (alpha-FeOOH) in the presence of siderophores that are secreted by plants and microorganisms to sequester iron. We report here the first in situ molecular-scale observations of synergistic ligand-promoted dissolution processes. We show that there are conditions under which oxalate promotes goethite dissolution, but dissolved Fe(III) concentrations do not increase because Fe(III)-oxalate complexes readsorb to the mineral surface. We demonstrate that these readsorbed Fe(III)-oxalate complexes are highly mobile, extremely reactive in the presence of uncomplexed siderophores, and responsible for the synergistic effects on the dissolution of goethite.

Publishing year

2008

Language

English

Pages

7054-7057

Publication/Series

Langmuir

Volume

24

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Earth and Related Environmental Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0743-7463