Microbial Reduction of Lepidocrocite γ-FeOOH by Shewanella putrefaciens; The Formation of Green Rust

Content Provider	Semantic Scholar
Author	Ona-Nguema, Georges Abdelmoula, Mustapha Jorand, François Benali, Omar Géhin, Antoine Block, J. C. Génin, Jean-Marie R.
Copyright Year	2002
Abstract	Dissimilatory iron-reducing bacteria (DIRB) couple the oxidation of organic matter or H2 to the reduction of iron oxides. The bacterial reduction of a most common well-crystallised ferric oxyhydroxide, γ-FeOOH was investigated using DIRB Shewanella putrefaciens, strain CIP 8040. Experiments were conducted in the presence of neither organic buffer nor phosphate, with formate as electron donor, bicarbonate, and anthraquinone-2,6-disulfonate (AQDS, a humic acid analogue) that influenced the extent of ferric oxide bioreduction. The production of Fe2+ was followed with time. The solid phases obtained after bacterial iron reduction were analysed by transmission Mossbauer spectroscopy (TMS) and X-ray diffraction (XRD). Biogenic formation of green rust 1 compound, which contains carbonate anions, [FeII2FeIII2(OH)8]2+⋅[CO32−]2− was observed. TMS was used to follow the evolution of the green rust abundance during the bacterial culture.
Starting Page	231
Ending Page	237
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1007/978-94-010-0299-8_24
Alternate Webpage(s)	http://page-one.springer.com/pdf/preview/10.1007/978-94-010-0299-8_24
Alternate Webpage(s)	https://doi.org/10.1007/978-94-010-0299-8_24
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article