Highly mobile iron pool from a dissolution-readsorption process
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4332412
- author
- Loring, John S. ; Simanova, Anna A. and Persson, Per LU
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 24
- pages
- 7054 - 7057
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:47949096978
- ISSN
- 0743-7463
- DOI
- 10.1021/la800785u
- language
- English
- LU publication?
- no
- additional info
- 14
- id
- 8cbd4b49-817a-4fd8-a16e-ae3e9c18aa62 (old id 4332412)
- date added to LUP
- 2016-04-01 12:33:36
- date last changed
- 2022-02-19 00:11:16
@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 (ACS)}}, series = {{Langmuir}}, title = {{Highly mobile iron pool from a dissolution-readsorption process}}, url = {{http://dx.doi.org/10.1021/la800785u}}, doi = {{10.1021/la800785u}}, volume = {{24}}, year = {{2008}}, }