2010
DOI: 10.1016/j.gca.2009.10.030
|View full text |Cite
|
Sign up to set email alerts
|

Oxidation modes and thermodynamics of FeII–III oxyhydroxycarbonate green rust: Dissolution–precipitation versus in situ deprotonation

Abstract: Fe II-III hydroxycarbonate green rust GR(CO 3 2À ), Fe II 4 Fe III 2 (OH) 12 CO 3 Á3H 2 O, is oxidized in aqueous solutions with varying reaction kinetics. Rapid oxidation with either H 2 O 2 or dissolved oxygen under neutral and alkaline conditions leads to the formation of ferric oxyhydroxycarbonate GR(CO 3 2À ) * , Fe III 6 O 12 H 8 CO 3 Á3H 2 O, via a solid-state reaction. By decreasing the flow of oxygen bubbled in the solution, goethite a-FeOOH forms by dissolution-precipitation mechanism whereas a mixtu… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

5
67
1

Year Published

2012
2012
2024
2024

Publication Types

Select...
6
3

Relationship

0
9

Authors

Journals

citations
Cited by 81 publications
(73 citation statements)
references
References 46 publications
5
67
1
Order By: Relevance
“…It was more likely formed in the early stages of the corrosion process, when dissolved O 2 could easily reach the inner stratum mainly made of GR(SO 4 2− ). In contrast, magnetite can only be obtained from GRs with very small oxygen concentrations [39]. This explains why it is not observed in the outer orange stratum.…”
Section: Large Carbon Steel Coupon (B) At Ocpmentioning
confidence: 94%
“…It was more likely formed in the early stages of the corrosion process, when dissolved O 2 could easily reach the inner stratum mainly made of GR(SO 4 2− ). In contrast, magnetite can only be obtained from GRs with very small oxygen concentrations [39]. This explains why it is not observed in the outer orange stratum.…”
Section: Large Carbon Steel Coupon (B) At Ocpmentioning
confidence: 94%
“…2 ) to form a well-ordered, variable valence platy mineral arranged orthogonally to the membrane outer surface, just as mackinawite tends to be oriented normal to the inner surface (figure 4) [123,[133][134][135][136]. The interlayers between these platelets offer subnanometric compartments in which water activity is vanishingly low.…”
Section: A Pyrophosphatase Engine: Chemiosmosis For Freementioning
confidence: 99%
“…Computer simulations have indicated that these could occur as a regular chain structure, with percolation at x ¼ 1 2 resulting in infinite straight chains of metaloxygen octahedra containing divalent cations alternating with others containing trivalent cations (Xiao et al, 1999). Ruby et al (2010) claim to have produced Fe 2+ -Fe 3+ LDH phases (i.e. the so-called 'green rust') that have values of x of 0, Bellotto et al, 1996;Bîrjega et al, 2005;Brindley & Kikkawa, 1979;Budhysutanto et al, 2011;Gastuche et al, 1967;Han et al, 1998;Jinesh et al, 2010;Kaneyoshi & Jones, 1999;Kukkadapu et al, 1997;Mascolo & Marino, 1980;Miyata, 1980;Pausch et al, 1986;Rao et al, 1998;Sato et al, 1988;Shen et al, 1994;Valente et al, 2011;Xu & Zeng, 2001;Yun & Pinnavaia, 1995;MgGa: Bellotto et al, 1996; Ló pez-Salinas et al, 1997.…”
Section: The Maximum Value Of X and An Explanation For The Variation mentioning
confidence: 99%
“…1 Ruby et al (2010) suggest that a preparation that is made with a composition between any pair of these four phases will consist of a mixture of the two end-members. The quality of the X-ray diffraction (XRD) data presented in Ruby et al (2010) deteriorates very significantly as the value of x increases: they state that 'a degradation of the diffractogram is observed with global peak broadening when x increases and some lines are no longer detectable for x values of 0.83 and 1'. Their XRD data for these two compositions are reproduced with an expanded intensity axis in Fig.…”
Section: The Maximum Value Of X and An Explanation For The Variation mentioning
confidence: 99%