Microbial Reduction of Fe(III) in the Fithian and Muloorina Illites : Contrasting Extents and Rates of Bioreduction

January 1, 2006

Journal Article

Microbial Reduction of Fe(III) in the Fithian and Muloorina Illites : Contrasting Extents and Rates of Bioreduction

Abstract

This study was undertaken to investigate the rate and extent of reduction of Fe(III) in two different illite samples, Muloorina and Fithian, by facultative anaerobe, Shewanella putrefaciens CN32. The Fithian illite (API reference illite from Illinois) is relatively pure with only a trace amount of goethite. The starting material contained 4% of Fe, 19% of which is Fe(II) as determined by Mössbauer spectroscopy. Mössbauer spectroscopy also confirmed the presence of two different sites for Fe(III) in the illite structure. The surface area of the Fithian illite is 85.31 m2/g. The Muloorina illite, attained from Lake Eyre, S. Australia, has a surface area of 107.68 m2/g. The

Revised: May 18, 2011 | Published: January 1, 2006

Citation

Seabaugh J.L., H. Dong, R.K. Kukkadapu, D.D. Eberl, J.P. Morton, and J. Kim. 2006. Microbial Reduction of Fe(III) in the Fithian and Muloorina Illites : Contrasting Extents and Rates of Bioreduction. Clays and Clay Minerals 54, no. 1:67-79. PNNL-SA-42876. doi:10.1346/CCMN.2006.0540109