Identification of a green rust mineral in a reductomorphic soil by Mossbauer and Raman spectroscopies

Trolard, Fabienne; Génin, J.‐M. R.; Abdelmoula, Mustapha; Bourrié, Guilhem; Humbert, Bernard; Herbillon, A. J.

doi:10.1016/s0016-7037(96)00381-x

Cited by 244 publications

(188 citation statements)

References 17 publications

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“…The synthesis of stoichiometric GR(CO 3 4 3− ] = 2 × 10 −2 M. Phosphate anion was added to stabilise the GR(CO 3 2− ) structure as previously discussed. [7] Twenty millilitres of the Fe(II)-Fe(III) solution was then introduced in a glass reactor, and the solution was deoxygenised under a nitrogen circulation for a 30-min duration.…”

Section: Methodsmentioning

confidence: 99%

XPS study of Fe(II)Fe(III) (oxy)hydroxycarbonate green rust compounds

Mullet

Khare

Ruby

2008

Surface & Interface Analysis

164

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Section: Methodsmentioning

confidence: 99%

XPS study of Fe(II)Fe(III) (oxy)hydroxycarbonate green rust compounds

Mullet

Khare

Ruby

2008

Surface & Interface Analysis

164

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“…High-energy components of the paramagnetic doublet of Fe(II) oct. sites (e.g., siderite, FeCO 3 ; green rusts, etc.) exhibit peaks in this region (Ono and Ito, 1964;Kundig et al, 1972;Sawicki and Brown, 1998;Trolard et al, 1997;Koch, 1998). Peaks at ϳ2.2 mm/s were prominent in samples that were incubated with AQDS for longer times (Fig.…”

Section: Biomineralization Productsmentioning

confidence: 99%

“…Green rust occurs frequently as a corrosion product of steel (Stampfl, 1969;Abdelmoula et al, 1996), and has been identified as a minor phase in hydromorphic soils (Trolard et al, 1997;Genin et al, 1998) and anoxic sediments where seasonal, dissimilatory iron reduction occurs. The conditions favoring the biogenic formation of green rust are not well understood.…”

Section: Extent and Controls On Ferrous Iron Precipitatesmentioning

confidence: 99%

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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“…Most monovalent interlayer anions are more easily exchanged compared with sulphate (Miyata, 1983) and thus GRs containing monovalent anions are expected to comprise more active phosphate sorbents than GRso 4. Thus, the hydroxyl-interlayer form of GR, which was postulated to exist in soils (Trolard et al, 1997), could be a potentially strong phosphate sorbent.…”

Section: P Retention Under Natural Anoxic Conditionsmentioning

confidence: 99%

“…Green rusts (GRs) represent Fe(II)Fe(III)-hydroxides, which can lbrm in anoxic environments (Taylor, 1980;Hansen et al, 1994) and GR-like compounds have recently been identified in gley soils (Trolard et al, 1997). GRs belong to the pyroaurite-class of layered double metal hydroxides, LDHs (Bernal et al, 1959;Brindley and Bish, 1976).…”

Section: Introductionmentioning

confidence: 99%

Interaction of Synthetic Sulphate “Green Rust” with Phosphate and the Crystallization of Vivianite

Hansen¹

1999

Clays and clay miner.

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Abstract--Because layered Fe(II)Fe(III)-hydroxides (Green rusts, GRs) are anion exchangers, they represent potential orthophosphate sorbents in anoxic soils and sediments. To evaluate this possibility, two types of experiments with synthetic sulphate-interlayered GRs (GRso 4 = Fe2+4Fe3+a(OH)12SO 4 xH20 ) were studied. First, sorption of phosphate in GRso 4 was followed by reacting suspensions of pure GRso ~ synthesized by oxidation of Fe(II) with an excess of Na2HPO4 (pH 9.3). Second the possible incorporation of phosphate in GR during formation by Fe(II)-induced reductive dissolution of phosphate-containing ferrihydrites was examined in systems containing an excess of Fe(lI) (pH 7). With excess phosphate in solution, GRso ~ initially sorbed phosphate in the interlayer producing a basal layer spacing of 1.04 nm, but only --50% of the interlayer sulphate was exchanged with phosphate. This GR slowly transformed to vivianite within months. In the Fe(II)-rich systems, reaction with synthetic ferrihydrites produced GRso 4 similar to that produced by air oxidation. Reaction of Fe(II) with phosphate-containing ferrihydrites initially produced amorphous greenish phosphate containing precipitates which, after 3-4 h, crystallized to GRso 4 and vivianite. In these solutions, stable phosphate-free GRso 4 can form since precipitation of vivianite produced low phosphate activity. Consequently, in both systems GR or amorphous greenish precipitates act as reactive intermediates, but vivianite is the stable end-product limiting phosphate concentration in solution. It is also inferred that Fe(OH) 2 is an unlikely phosphate sorbent in mixed Fe(II)-Fe(III) systems because GR phases are more stable (less soluble) than Fe(OH)2.

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Identification of a green rust mineral in a reductomorphic soil by Mossbauer and Raman spectroscopies

Cited by 244 publications

References 17 publications

XPS study of Fe(II)Fe(III) (oxy)hydroxycarbonate green rust compounds

XPS study of Fe(II)Fe(III) (oxy)hydroxycarbonate green rust compounds

Dissimilatory bacterial reduction of Al-substituted goethite in subsurface sediments

Interaction of Synthetic Sulphate “Green Rust” with Phosphate and the Crystallization of Vivianite

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