Mechanisms of formation and structure of green rust one in aqueous corrosion of iron in the presence of chloride ions

Refait, Philippe; Abdelmoula, Mustapha; Génin, J.‐M. R.

doi:10.1016/s0010-938x(98)00066-3

Cited by 278 publications

(192 citation statements)

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“…[Charlet et al 1998, 26, Ligert et al 1999 In a subsurface ZVI reactive wall, U(VI) can be reduced by a number of abiotic and microbially mediated processes. [Lovley & Phillips 1992, Francis & Dodge 1998, O'Loughlin et al 2003, Refait et al 1998 In particular, abiotic reduction by green rusts (mixed ferrous/ferric hydroxides) have been reported [O'Loughlin et al 2003, Roh et al 2000 . Therefore, the success of ZVI in mitigating U(VI) in reactive walls may rely in the progressive production of Fe 2+ ions which react themselves as reductants or contribute to the formation of reductive species such as green rusts.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Mechanism of Uranium Removal by Zerovalent Iron

Noubactep¹,

Meinrath

Merkel

2005

Environ. Chem.

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Environmental ContextGroundwater remediation is mostly a costly long-term process. In-situ remediation by permeable reactive barriers is a potential solution. For pollution by halogenated hydrocarbons, nitrate, and chromium, zerovalent iron (ZVI) has been found to induce a chemical reduction.ZVI remediation technology has been extended to metal pollution, where one of the major removal mechanisms seems to be co-precipitation with the products of iron corrosion. Due to difficulties of identifying reaction products in the matrix of corrosion products, investigation methods for characterising the contaminant removal with respect to interactions between contaminant and corrosion products need to be developed. AbstractZerovalent iron (ZVI) has been proposed as a reactive material in permeable in-situ walls for groundwater contaminated by metal pollutants. For such pollutants which interact with corrosion products, the determination of the actual mechanism of their removal is very important to predict the long-term stability of reactive walls. From a study of the effects of pyrite (FeS 2 ) and manganese nodules (MnO 2 ) on the uranium removal potential of a selected ZVI material, a test methodology (FeS 2 -MnO 2 -method) is suggested to follow the pathway of contaminant removal by ZVI materials. An interpretation of the removal potential of ZVI for uranium in presence of both additives corroborates coprecipitation with iron corrosion products as a major removal mechanism for uranium.

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Section: Discussionmentioning

confidence: 99%

Investigating the Mechanism of Uranium Removal by Zerovalent Iron

Noubactep¹,

Meinrath

Merkel

2005

Environ. Chem.

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“…The established redox (Eh, pH) boundaries for the stable phases of iron [19,[69][70][71][72][73][74][75] in saline water are shown in Figure 5a. The stable equilibrium species are Fe 0 , Fe 2+ ions, Fe(OH)2, Green Rust One (GR1, GR:Cl), and FeOOH.…”

Section: Fe 0 Corrosion Seriesmentioning

confidence: 99%

“…The stable equilibrium species are Fe 0 , Fe 2+ ions, Fe(OH)2, Green Rust One (GR1, GR:Cl), and FeOOH. During corrosion (oxidation), the sequential reaction series in saline water which is free of sulphates and bicarbonates/carbonates is [19,[69][70][71][72][73][74][75]:…”

Section: Fe 0 Corrosion Seriesmentioning

confidence: 99%

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Desalination of Water Using ZVI (Fe0)

Antia¹

2015

Water

196

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Batch treatment of water (0.2 to 240 L) using Fe 0 (44,000-77,000 nm) in a diffusion environment operated (at −8 to 25 °C) using: (a) no external energy; (b) pressurized (<0.1 MPa) air; (c) pressurized (<0.1 MPa) acidic gas (CO2); (d) pressurized (<0.1 MPa) anoxic gas (N2); (e) pressurized (<0.1 MPa) anoxic, acidic, reducing gas (H2 + CO + CO2 + CH4 + N2), reduces the salinity of water. Desalination costs increase with increasing NaCl removal. The cost of reducing water salinity from: (i) 2.65 to 1.55 g·L . Desalination is accompanied by the removal, from the water, of one or more of: nitrate, chloride, fluoride, sulphate, phosphate, As, B, Ba, Ca, Cd, Co, Cu, Fe, Mg, Mn, Na, Ni, P, S, Si, Sr, Zn. The rate of desalination is enhanced by increasing temperatures and increasing HCO3 − /CO3 2− concentrations. The rate of desalination decreases with increasing SO4 2− removal under acidic, or pH neutral, operating conditions.

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“…Ishikawa et al (1999) demonstrated that addition of Co(II) and Cu(II) during synthesis of Fe(OH) 2 resulted in production of magnetite and inhibited goethite crystallization; while the presence of Cr(III) exhibited the opposite effect. Using X-ray diffraction analysis Refait et al (1998) established that the structure for a synthetically prepared green rust I consisted of Fe(OH) 2 sheets alternating regularly with negatively charged interlayers of chloride ions and water molecules.…”

Section: Uranium Association With Iron Oxides Commonly Found On Corromentioning

confidence: 99%

Mechanisms of Radionuclide-Hyroxycarboxylic Acid Interactions for Decontamination of Metallic Surfaces

Francis¹,

Halada²

2000

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Mechanisms of formation and structure of green rust one in aqueous corrosion of iron in the presence of chloride ions

Cited by 278 publications

References 18 publications

Investigating the Mechanism of Uranium Removal by Zerovalent Iron

Investigating the Mechanism of Uranium Removal by Zerovalent Iron

Desalination of Water Using ZVI (Fe0)

Mechanisms of Radionuclide-Hyroxycarboxylic Acid Interactions for Decontamination of Metallic Surfaces

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