Oxidation of chukanovite (Fe 2 (OH) 2 CO 3 ): Influence of the concentration ratios of reactants
Source abstract
Abstract
Abstract The oxidation of aqueous suspensions of chukanovite (Fe2(OH)2CO3) obtained by mixing NaOH, FeCl2 and Na2CO3 solutions was studied for various [Fe2+]/[OH−] and [CO32−]/[OH−] concentration ratios. The redox potential of a platinum electrode immersed in the suspension was monitored during the oxidation process which reveals the presence of a plateau corresponding to equilibrium conditions between chukanovite and a poorly crystallized Fe(III) oxyhydroxide. The end products were characterized by Infrared spectroscopy and X-ray diffraction. Carbonate favoured the formation of goethite while Fe2+aq favoured lepidocrocite. This effect is mainly due to the influence of these species on the pH of the solution.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Iron oxide chemistry and applications · Mine drainage and remediation techniques · Metal Extraction and Bioleaching
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Mechanisms of long-term anaerobic corrosion of iron archaeological artefacts in seawater10.1016/j.corsci.2009.08.022 ↗
2. Long-term corrosion behaviour of low-carbon steel in anoxic environment: characterisation of archaeological artefacts10.1016/j.jnucmat.2008.06.019 ↗
3. Multisecular corrosion behaviour of low carbon steel in anoxic soils: characterisation of corrosion system on archaeological artefacts10.1002/maco.200805017 ↗
4. Interfacial layer on archaeological mild steel corroded in carbonated, anoxic environments studied with coupled micro and nano probes10.1016/j.corsci.2014.07.005 ↗
5. Electrochemical synthesis and characterization of corrosion products on carbon steel under argillite layers in carbonated media at 80°C10.1016/j.electacta.2013.09.163 ↗
6. Corrosion of metal iron in contact with anoxic clay at 90°C: characterization of the corrosion products after two years of interaction10.1016/j.apgeochem.2014.09.002 ↗
7. Longevity of granular iron in groundwater treatment processes: corrosion product development10.1021/es048851k ↗
8. Iron hydroxy carbonate formation in zerovalent iron permeable reactive barriers: characterization and evaluation of phase stability10.1016/j.jconhyd.2010.05.009 ↗
9. In situ synchrotron X-ray diffraction study of the effect of chromium additions to the steel and solution on CO2 corrosion of pipeline steels10.1016/j.corsci.2013.11.035 ↗
10. Chukanovite (Fe2(OH)2CO3) identified as a corrosion product at sand-deposited carbon steel in CO2-saturated brine10.1016/j.corsci.2014.03.032 ↗
11. In situ synchrotron X-ray diffraction study of the effect of microstructure and boundary layer conditions on CO2 corrosion of pipeline steels10.1016/j.corsci.2014.10.010 ↗
12. Corrosion of steel in carbonated media: the oxidation processes of chukanovite (Fe2(OH)2CO3)10.1016/j.corsci.2014.04.004 ↗
13. Ein dem Malachit ähnliches basisches Eisenkarbonat als Korrosionsprodukt von Stahl10.1002/maco.19760270504 ↗
14. The mechanism of oxidation of ferrous hydroxide in sulphated aqueous media: importance of the initial ratio of the reactants10.1016/0010-938X(91)90016-I ↗
15. The oxidation of ferrous hydroxide in chloride-containing aqueous media and Pourbaix diagrams of Green Rust One10.1016/0010-938X(93)90101-L ↗
16. Preparation and thermodynamic properties of Fe(II)–Fe(III) hydroxide-carbonate (green rust one), Pourbaix diagram of iron in carbonate-containing aqueous media10.1016/0010-938X(95)00096-3 ↗
17. Determination of standard Gibbs free energy of formation of green rusts and its application to the Fe(II-III) hydroxy-oxalate10.1016/j.colsurfa.2012.06.020 ↗
18. Fe(II) hydroxycarbonate Fe2(OH)2CO3 (Chukanovite) as iron corrosion product: synthesis and study by Fourier Transform Infrared Spectroscopy10.1016/j.poly.2008.12.034 ↗
19. Determination of standard Gibbs free energy of formation of chukanovite and Pourbaix diagrams of iron in carbonated media10.1016/j.corsci.2012.01.033 ↗
20. The NBS tables of chemical thermodynamic properties. Selected values for inorganic and C1 and C2 organic substances in SI units
21. Lattice vibration spectra. Part XCV. Infrared spectroscopic studies on the iron oxide hydroxides goethite (α) akaganéite (β), lepidocrocite (γ), and feroxyhite (δ)10.1016/S0992-4361(99)80017-4 ↗
22. Mössbauer spectroscopy characterization and electrochemical study of the kinetics of oxidation of iron in chlorinated aqueous media: structure and equilibrium diagram of green rust one10.4028/www.scientific.net/MSF.8.477 ↗
23. Influence of concentration on the oxidation of ferrous hydroxide in basic sulphated aqueous medium: particle size analysis of goethite and delta FeOOH10.1016/0010-938X(91)90018-K ↗
24. Etude cinétique de la formation de goethite par aération de gels d’hydroxyde ferreux
25. Synthesis of goethite from Fe(OH)2 precipitates: influence of Fe(II) concentration and stirring speed10.1016/j.jpcs.2008.03.010 ↗
26. Löslichkeitsprodukte von Metalloxiden und –hydroxide, VIII, Die Löslichkeit gealterter Eisen (III)-hydroxid-Fällungen10.1002/hlca.19630460204 ↗
27. Chivot · 2004
28. Size-driven structural and thermodynamic complexity in iron oxides10.1126/science.1148614 ↗
29. Thermodynamics of Fe oxides: Part II. Enthalpies of formation and relative stability of goethite (α-FeOOH), lepidocrocite (γ-FeOOH), and maghemite (γ-Fe2O3)10.2138/am-2003-5-614 ↗
30. Effect of orthophosphate on the oxidation products of Fe(II)–Fe(III) hydroxycarbonate: the transformation of green rust to ferrihydrite10.1016/S0016-7037(01)00556-7 ↗
31. Effect of the pH on the formation of goethite and hematite from ferrihydrite10.1346/CCMN.1983.0310405 ↗
32. A study of the initially-formed hydrolysis species and intermediate polymers and their role in determining the product iron oxides formed in the weathering if iron
33. Fe(II)-induced transformation from ferrihydrite to lepidocrocite and goethite10.1016/j.jssc.2007.03.022 ↗
34. The transformation of ferrihydrite in the presence of trace Fe(II): the effect of the anionic media10.1016/j.jssc.2008.06.052 ↗
35. Studies on the controllable transformation of ferrihydrite
36. Thermodynamics of iron oxides: Part III. Enthalpies of formation and stability of ferrihydrite (∼Fe(OH)3), shwertmannite (∼FeO(OH)3/4(SO4)1/8), and ɛ-Fe2O310.1016/S0016-7037(03)00371-5 ↗
37. In situ Mössbauer spectroscopic study of reactions within rust layers10.1016/0010-938X(89)90123-6 ↗
38. Corrosion of iron from heritage buildings: proposal for degradation indexes based on rust layer composition and electrochemical reactivity10.1179/147842210X12779093813740 ↗