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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/42994
Record Status
Checked
Record Id
42994
Title
Time-resolved synchrotron X-ray powder diffraction study of biogenic nanomagnetite
Contributors
AMT Bell (CCLRC Daresbury Lab.)
,
VS Coker (SEAES, Manchester U.)
,
CI Pearce (SEAES, Manchester U.)
,
RAD Pattrick (SEAES, Manchester U.)
,
G van der Laan (CCLRC Daresbury Lab.)
,
JR Lloyd (SEAES, Manchester U.)
Abstract
The bacterium Geobacter sulfurreducens can produce nanoparticulate magnetite (Fe<sub>3</sub>O<sub>4</sub>) by the reduction of amorphous Fe(III) oxyhydroxide coupled to the oxidation of organic matter in the anoxic subsurface as an alternative to oxygen respiration. G. sulfurreducens can transfer electrons to solid Fe(III)-bearing minerals through either direct contact between the cell and the mineral surface or by using an electron shuttling compound. High resolution synchrotron X-ray powder diffraction has been used to study samples taken at different stages of this reaction. This shows that an initial amorphous phase first transforms to goethite (FeO(OH)), before undergoing a further transformation to magnetite. Magnetite is formed faster in the presence of the electron shuttling compound disodium anthraquinone 2,6 disulphonate.
Organisation
SRS
,
2.3
,
STFC
Keywords
synchrotron radiation
,
iron oxides
,
Materials
,
Chemistry
,
Natural environment
,
powder diffraction
,
biotransformation
,
Biology
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Paper In Conference Proceedings
In 10th European Powder Diffraction Conference (EPDIC-10), Geneva, Switzerland, 1-4 Sep 2006, (2008).
zkri.2007.2007.suppl_26.pdf
2008
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