Bacterial reduction of crystalline Fe (super 3+) oxides in single phase suspensions and subsurface materials

Zachara, John M.; Fredrickson, James K.; Li, Shumei; Kennedy, David W.; Smith, Steven C.; Gassman, Paul L.

doi:10.2138/am-1997-11-1232

Cited by 154 publications

(289 citation statements)

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“…Although not well studied, natural crystalline Fe(III) oxides, including both goethite and hematite, appear more reducible than those synthesized in the laboratory (Roden and Zachara, 1996;Zachara et al, 1998). The reasons for this observation have not been confirmed but isomorphous substitution of Fe(III) by other metals (e.g., Al(III)), and larger crystallite disorder, surface roughness, and surface area of natural Fe(III) oxides may be important.…”

Section: Introductionmentioning

confidence: 94%

“…The final pH ranged between 6.75 without AQDS up to a maximum of 7.15 with AQDS. The final pH values of reduced, synthetic Fe(III) oxide suspensions are typically higher Zachara et al, 1998). The solubilities of both siderite and green rust are strongly pH-dependent, increasing with decreasing pH (Bruno et al, 1992;Genin et al, 1998).…”

Section: Extent and Controls On Ferrous Iron Precipitatesmentioning

confidence: 99%

“…Amorphous and crystalline Fe(III) oxides are utilized as electron acceptors by dissimilatory Fe-reducing bacteria (DIRB) (Lovley and Phillips, 1986;Arnold et al, 1986;Roden and Zachara, 1996;Fredrickson et al, 1998;Zachara et al, 1998). S. alga and other facultative Shewanella strains can grow, albeit slowly, using ferrihydrite and goethite as sole electron acceptors (Roden and Zachara, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Synthetic goethite is resistant to bacterial reduction and, in general, is incompletely reduced in presence of excess electron donor and large cell populations (e.g., Ͼ10 8 cells/mL). Low solubility, saturation of the residual oxide and bacterial surfaces with biogenic Fe(II), free energy availability, and complex physiologic factors apparently control the rate and extent of reduction (Roden and Zachara, 1996;Urrutia et al, 1998;Zachara et al, 1998;Liu et al, 2001). Aqueous and solid-phase ligands that withdraw biogenic Fe(II) from the oxide and bacterial surfaces tend to increase the extent of goethite reduction (Urrutia et al, 1998(Urrutia et al, , 1999, presumably by reducing the surface saturation of Fe(II).…”

Section: Introductionmentioning

confidence: 99%

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Dissimilatory bacterial reduction of Al-substituted goethite in subsurface sediments

Kukkadapu

Zachara

Smith

et al. 2001

Geochimica et Cosmochimica Acta

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Abstract-The microbiologic reduction of a 0.2 to 2.0 m size fraction of an Atlantic coastal plain sediment (Eatontown) was investigated using a dissimilatory Fe(III)-reducing bacterium (Shewanella putrefaciens, strain CN32) to evaluate mineralogic controls on the rate and extent of Fe(III) reduction and the resulting distribution of biogenic Fe(II). Mössbauer spectroscopy and X-ray diffraction (XRD) were used to show that the sedimentary Fe(III) oxide was Al-substituted goethite (13-17% Al) that existed as 1-to 5-m aggregates of indistinct morphology. Bioreduction experiments were performed in two buffers [HCO 3 Ϫ ; 1,4-piperazinediethansulfonic acid (PIPES)] both without and with 2,6-anthraquinone disulfonate (AQDS) as an electron shuttle. The production of biogenic Fe(II) and the distribution of Al (aqueous and sorbed) were followed over time, as was the formation of Fe(II) biominerals and physical/chemical changes to the goethite.The extent of reduction was comparable in both buffers. The reducibility (rate and extent) was enhanced by AQDS; 9% of dithionite-citrate-bicarbonate (DCB) extractable Fe(III) was reduced without AQDS whereas 15% was reduced in the presence of AQDS. XRD and Mössbauer spectroscopy were used to monitor the disposition of biogenic Fe(II) and changes to the Al-goethite. Fe(II) biomineralization was not evident by XRD. Biomineralization was observed by Mössbauer when sorbed Fe(II) concentrations exceeded a threshold value. The biomineralization products displayed Mössbauer spectra consistent with siderite FeCO 3 (HCO 3 Ϫ buffer only) and green rust . Adsorption of biogenic Fe(II) to accessory mineral phases (e.g., kaolinite) and bacterial surfaces appeared to limit biomineralization. Al evolved during reduction was sorbed, and extractable Al increased with reduction. XRD analysis indicated that neither crystallite size or the Al content of the goethite was affected by bacterial reduction, i.e., Al release was congruent with Fe(II).

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Section: Introductionmentioning

confidence: 94%

Section: Extent and Controls On Ferrous Iron Precipitatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dissimilatory bacterial reduction of Al-substituted goethite in subsurface sediments

Kukkadapu

Zachara

Smith

et al. 2001

Geochimica et Cosmochimica Acta

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“…The biostimulation of DMRB will likely lead to biological Fe(III) reduction (Wielinga et al, 2000;Finneran et al, 2002;Anderson et al, 2003;Elias et al, 2004;) and production of sorbed Fe(II) or Fe(II)-bearing minerals as metabolic products. The Fe(II)-bearing phases found include magnetite, siderite, vivianite, ferruginous smectite, and green rust (Bell et al, 1987;Roden and Zachara, 1996;Fredrickson et al, 1998;Zachara et al, 1998;Dong et al, 2000;Roh et al, 2003;O'Loughlin et al, 2007;Komlos et al, 2008;O'Loughlin et al, 2010). Sorbed Fe(II) and the Fe(II)-bearing biogenic phases can provide a reservoir of reducing capacity where reduction of U(VI) may occur due to abiotic interactions .…”

Section: Introductionmentioning

confidence: 99%

Products of abiotic U(VI) reduction by biogenic magnetite and vivianite

Veeramani

Alessi

Suvorova

et al. 2011

Geochimica et Cosmochimica Acta

138

122

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Reductive immobilization of uranium by the stimulation of dissimilatory metal-reducing bacteria (DMRB) has been investigated as a remediation strategy for subsurface U(VI) contamination. In those environments, DMRB may utilize a variety of electron acceptors, such as ferric iron which can lead to the formation of reactive biogenic Fe(II) phases. These biogenic phases could potentially mediate abiotic U(VI) reduction. In this work, the DMRB Shewanella putrefaciens strain CN32 was used to synthesize two biogenic Fe(II)-bearing minerals: magnetite (a mixed Fe(II)-Fe(III) oxide) and vivianite (an Fe(II)-phosphate). Analysis of abiotic redox interactions between these biogenic minerals and U(VI) showed that both biogenic minerals reduced U(VI) completely. XAS analysis indicates significant differences in speciation of the reduced uranium after reaction with the two biogenic Fe(II)-bearing minerals. While biogenic magnetite favored the formation of structurally ordered, crystalline UO 2 , biogenic vivianite led to the formation of a monomeric U(IV) species lacking U-U associations in the corresponding EXAFS spectrum. To investigate the role of phosphate in the formation of monomeric U(IV) such as sorbed U(IV) species complexed by mineral surfaces, versus a U(IV) mineral, uranium was reduced by biogenic magnetite that was pre-sorbed with phosphate. XAS analysis of this sample also revealed the formation of monomeric U(IV) species suggesting that the presence of phosphate hinders formation of UO 2 . This work shows that U(VI) reduction products formed during in situ biostimulation can be influenced by the mineralogical and geochemical composition of the surrounding environment, as well as by the interfacial solute-solid chemistry of the solid-phase reductant.

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Effect of ferrihydrite biomineralization on methanogenesis in an anaerobic incubation from paddy soil

Tang

et al. 2015

J. Geophys. Res. Biogeosci.

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Microbial reduction of Fe(III) can be one of the major factors controlling methane production from anaerobic sedimentary environments, such as paddy soils and wetlands. Although secondary iron mineralization following Fe(III) reduction is a process that occurs naturally over time, it has not yet been considered in methanogenic systems. This study performed a long-term anaerobic incubation of a paddy soil and ferrihydrite-supplemented soil cultures to investigate methanogenesis during ferrihydrite biomineralization. The results revealed that the long-term effect of ferrihydrite on methanogenesis may be enhancement rather than suppression documented in previous studies. During initial microbial ferrihydrite reduction, methanogenesis was suppressed; however, the secondary minerals of magnetite formation was simultaneous with facilitated methanogenesis in terms of average methane production rate and acetate utilization rate. In the phase of magnetite formation, microbial community analysis revealed a strong stimulation of the bacterial Geobacter, Bacillus, and Sedimentibacter and the archaeal Methanosarcina in the ferrihydrite-supplemented cultures. Direct electric syntrophy between Geobacter and Methanosarcina via conductive magnetite is the plausible mechanism for methanogenesis acceleration along with magnetite formation. Our data suggested that a change in iron mineralogy might affect the conversion of anaerobic organic matter to methane and might provide a fresh perspective on the mitigation of methane emissions from paddy soils by ferric iron fertilization.

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Bacterial reduction of crystalline Fe (super 3+) oxides in single phase suspensions and subsurface materials

Cited by 154 publications

References 0 publications

Dissimilatory bacterial reduction of Al-substituted goethite in subsurface sediments

Dissimilatory bacterial reduction of Al-substituted goethite in subsurface sediments

Products of abiotic U(VI) reduction by biogenic magnetite and vivianite

Effect of ferrihydrite biomineralization on methanogenesis in an anaerobic incubation from paddy soil

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