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Cited by 318

The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.

Thermodynamic Equilibria in Aqueous Suspensions of Synthetic and Natural Fe(II)−Fe(III) Green Rusts: Occurrences of the Mineral in Hydromorphic Soils

Génin, Jean-Marie R., Bourrié, Guilhem, Trolard, Fabienne, Abdelmoula, Mustapha, Jaffrezic, Anne, Refait, Philippe, Maitre, Véronique, Humbert, Bernard, Herbillon, Adrien·1998·Environmental Science & Technology

Abstract

Synthetic green rusts, GRs, are prepared by oxidation of Fe(OH) 2 incorporating Cl -, SO 4 2-, or CO 3 2- ions. E h −pH diagrams are drawn, and thermodynamic data are derived. A GR incorporating OH - ions, GR1(OH - ), is suspected to exist like similar other M(II)−M(III) compounds. GRs form as corrosion products of steels, implying microbially induced corrosion. Mössbauer and Raman spectroscopies allowed the identification of GR in samples extracted from hydromorphic soils scattered over Brittany, France. This mineral has a varying Fe(III)/Fe(II) ratio. At Fougères, it increases with depth till the oc currence of more oxidized ferric oxyhydroxide. In the same sites, soil solutions are collected and prevented from any oxidation and photoreduction. In large ranges of pH, pe, and Fe(II) concentration variations, soil solutions are in equilibrium with a Fe(II)−Fe(III) compound, a GR1 mineral with pyroaurite-like structure incorporating OH - ions and having the formula [Fe II (1 - x ) Fe III x (OH) 2 ] + x ·[ x OH] - x ≡ Fe(OH) (2+ x ) . Computation of ionic activity products (IAP) of the equilibria between minerals and solutions leads to molar ratio x from 1/3 to 2/3, in agreement with the Fe(III)/Fe(II) ratios obtained from Mössbauer spectroscopy. The GR mineral plays a key role for controlling iron in soil solutions, and equilibria between soil and suspension constrain the Fe(III)/Fe(II) ratios of the iron(II)−iron(III) hydroxide.

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Crossref · 10.1021/es970547m

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Metadata

Authors
Génin, J.-M. R., Bourrié, G., Trolard, F., Abdelmoula, M., Jaffrezic, A., Refait, P., Maitre, V., Humbert, B., & Herbillon, A.
Venue
Environmental Science & Technology
Published
1998-03-12
Volume
32
Issue
8
Pages
1058-1068
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2032744270
Cited by
318
References
28
FWCI
12.19
Type
journal article
Language
en
Open access
closed

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