The mechanism of the oxygen reduction on rust-covered metal substrates

Stratmann, M.; Müller, Julian

doi:10.1016/0010-938x(94)90161-9

Cited by 232 publications

(144 citation statements)

References 24 publications

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“…Under most circumstances, these layers are thick, porous and therefore nonprotective [27][28][29][30]. This non-protective property of the oxide film is the essential characteristic making elemental iron (Fe 0 materials) appropriate for groundwater remediation [45,46,101].…”

Section: Discussionmentioning

confidence: 99%

“…Since oxygen absorption corrosion occurs in neutral waters where iron solubility is very low, there is clearly a much greater chance of obstructive films forming at the anode. This film acts as a diffusion barrier for oxygen supply which is essential for the mechanism to continue [27][28][29]54].…”

Section: Corrosion With Oxygen Absorptionmentioning

confidence: 99%

“…The effects of oxide film growth on contaminant transport to the Fe 0 surface have not been properly investigated. Background knowledge in this area comes primarily from two fields (1) atmospheric and immersed corrosion [26][27][28][29][30] (2) subsurface pipe corrosion [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS

Noubactep¹

2008

Environmental Technology

343

308

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A central aspect of the contaminant removal by elemental iron materials (Fe 0 or Fe 0 materials) is that reduction reactions are mediated by the iron surface (direct reduction). This premise was introduced by the pioneers of the reactive wall technology and is widely accepted by the scientific community. In the meantime enough evidence has been provided to suggest that contaminant reduction through primary corrosion products (secondary reductants) does indeed occur (indirect reduction). It was shown for decades that iron corrosion in the pH range of natural waters (4-9) inevitably yields an obstructive oxide film of corrosion products at the metal surface (oxide film). Therefore, contaminant adsorption on to corrosion products and contaminant co-precipitation with corrosion products inevitably occurs. For adsorbed and coprecipitated contaminants to be directly reduced the oxide film should be electronic conductive. This study argues through a literature review a series of points which ultimately lead to the conclusion that, if any quantitative contaminant reduction occurs in the presence of Fe 0 materials, it takes place within the matrix of corrosion products and is not necessarily a direct reduction. It is concluded that Fe 0 materials act both as source of corrosion products for contaminant adsorption/coprecipitation and as a generator of Fe II and H 2 (H) for possible catalytic contaminant reduction.

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Section: Discussionmentioning

confidence: 99%

Section: Corrosion With Oxygen Absorptionmentioning

confidence: 99%

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A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS

Noubactep¹

2008

Environmental Technology

343

308

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“…It has been demonstrated/recalled that under environmental conditions, the Fe 0 /H2O interface does not exist [101][102][103][104][105][106]. Rather, there is a minimum of two interfaces: Fe 0 /Fe-oxides and Fe-(hydr)oxide/H2O, with the material comprising a "core-shell" structure [80,81,[107][108][109][110][111][112].…”

Section: /H2o Systemmentioning

confidence: 99%

Testing Metallic Iron Filtration Systems for Decentralized Water Treatment at Pilot Scale

Tepong-Tsindé

Crane

Noubactep

et al. 2015

Water

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There are many factors to consider for the design of appropriate water treatment systems including: cost, the concentration and type of biological and/or chemical contamination, concentration limits at which contaminant(s) are required to be removed, required flow rate, level of local expertise for on-going maintenance, and social acceptance. An ideal technology should be effective at producing clean, potable water; however it must also be low-cost, low-energy (ideally energy-free) and require low-maintenance. The use of packed beds containing metallic iron (Fe 0 filters) has the potential to become a cheap widespread technology for both safe drinking water provision and wastewater treatment. for decentralized water treatment particularly in the developing world. A design for safe drinking water to a community of 100 people is also discussed as starting module. It is suggested that Fe 0 filters have the potential for significant worldwide applicability, but particularly in the developing world. The appropriate design of Fe 0 filters, however, is site-specific and dependent upon the availability of local expertise/materials.

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“…[3][4][5][6][7][8] The mechanism of atmospheric corrosion has been discussed on the basis of electrochemical reactions, and electrochemical methods and other techniques were utilized for studying reaction processes in atmospheric corrosion. [9][10][11][12][13] It was considered in these works that the anodic metal dissolution reaction is balanced by the cathodic reaction during corrosion, and the reduction and re-oxidation of corrosion products of ferric and ferrous ions can occur in water. In order to prove these reactions in corrosion, in-situ 57 Fe Mössbauer spectroscopy was employed to analyze the resultant corrosion products.…”

Section: Introductionmentioning

confidence: 99%

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

et al. 2005

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In-situ X-ray diffraction measurements by synchrotron radiation and conventional X-ray source have been carried out for identifying constituent species of corrosion products, which were formed on the surface of a pure iron and an iron-5 mass% nickel alloy by reaction with aqueous solutions containing sodium chloride or sodium sulfate. A cell has been prepared for in-situ diffraction measurements of the corrosion products. Diffraction patterns from the corrosion products showed that major constituent species of the corrosion products was -FeOOH, and the fraction of minor species of -FeOOH and Fe 3 O 4 in the corrosion products depended on corrosion conditions, such as wetting and drying processes, anion species in aqueous solutions and nickel in the sample. An oxide scale thermally formed on the iron surface was also found to affect the formation of corrosion products.

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The mechanism of the oxygen reduction on rust-covered metal substrates

Cited by 232 publications

References 24 publications

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS

Testing Metallic Iron Filtration Systems for Decentralized Water Treatment at Pilot Scale

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

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The mechanism of the oxygen reduction on rust-covered metal substrates

Cited by 232 publications

References 24 publications

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE0–H2O SYSTEMS

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE0–H2O SYSTEMS

Testing Metallic Iron Filtration Systems for Decentralized Water Treatment at Pilot Scale

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

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Product

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A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE⁰–H₂O SYSTEMS