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Highly mobile iron pool from a dissolution-readsorption process

Loring, John S.; Simanova, Anna A. and Persson, Per LU (2008) In Langmuir 24. p.7054-7057
Abstract
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.
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
24
pages
7054 - 7057
publisher
The American Chemical Society
external identifiers
  • scopus:47949096978
ISSN
0743-7463
DOI
10.1021/la800785u
language
English
LU publication?
no
id
8cbd4b49-817a-4fd8-a16e-ae3e9c18aa62 (old id 4332412)
date added to LUP
2014-03-04 09:47:45
date last changed
2017-08-20 03:47:51
@article{8cbd4b49-817a-4fd8-a16e-ae3e9c18aa62,
  abstract     = {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.},
  author       = {Loring, John S. and Simanova, Anna A. and Persson, Per},
  issn         = {0743-7463},
  language     = {eng},
  pages        = {7054--7057},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Highly mobile iron pool from a dissolution-readsorption process},
  url          = {http://dx.doi.org/10.1021/la800785u},
  volume       = {24},
  year         = {2008},
}