Enthalpy of water adsorption and surface enthalpy of lepidocrocite (γ-FeOOH)

Majzlan, Juraj; Mazeina, Lena; Navrotsky, Alexandra

doi:10.1016/j.gca.2006.10.010

Cited by 63 publications

(49 citation statements)

References 31 publications

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“…For oxides and oxyhydroxides, the order of decreasing surface energies generally follows the increasing metastability of the polymorph (Navrotsky, 2003(Navrotsky, , 2004. The surface energies for anhydrous oxide surfaces and oxyhydroxides are also similar to those observed with calcite and are higher than the measured values for hydrated surfaces (Mazeina et al, 2006;Mazeina and Navrotsky, 2007;Majzlan et al, 2007).…”

Section: Surface Enthalpy For the Hydrous And Anhydrous Surfacesupporting

confidence: 61%

“…Five to ten mg of pelletized sample was dropped into 25 g of 5.0 N HCl (Alfa Aesar) and the heat effect (0.1-0.2 J) was recorded over the reaction time. Previous experiments have indicated that the calorimeter in this configuration is capable of detecting effects as small as 0.02 J (Majzlan et al, 2007). The integrated calorimetric curve was converted to the enthalpy of solution (DH sol ) using a calibration factor obtained by dissolving 15 mg pellets of KCl (NIST standard reference material 1655) in water with stirring at 26°C.…”

Section: Acid Solution Calorimetrymentioning

confidence: 99%

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The energetics of nanophase calcite

Forbes

Radha

Navrotsky

2011

Geochimica et Cosmochimica Acta

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Section: Surface Enthalpy For the Hydrous And Anhydrous Surfacesupporting

confidence: 61%

Section: Acid Solution Calorimetrymentioning

confidence: 99%

The energetics of nanophase calcite

Forbes

Radha

Navrotsky

2011

Geochimica et Cosmochimica Acta

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“…It is reasonably accepted [5,6] that the initial corrosion product of the steel is α-FeOOH which then transforms to the mixtures of Fe 2 O 3 and Fe 3 O 4 . High water content prevents the oxygen from diffusing into the surface of sample and the transformation of α-FeOOH into Fe 2 O 3 and Fe 3 O 4 progresses very slowly.…”

Section: Resultsmentioning

confidence: 99%

Characterization of corrosion products formed on the surface of carbon steel by Raman spectroscopy

Nie

et al. 2008

J Raman Spectroscopy

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Corrosion of carbon steel in seashore salty soils containing 10, 20, and 34 wt% (saturated) water was investigated. The corrosion rate was measured and corrosion products were analyzed using Raman spectroscopy. It was found that carbon steel in the soil with 10 wt% water content had the largest corrosion rate and the corrosion was dominated by localized corrosion. The corrosion rate drops dramatically and turns to be general corrosion with increase of water content. The corrosion products in the soil with 20 and 34 wt% water content are mainly composed of α-FeOOH, while in the soil with 10 wt% water content, the products show a delaminated structure of two layers with the inner layer mainly consisting of α-FeOOH and the outer layer composed of Fe 2 O 3 and Fe 3 O 4 .

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“…The hydration shells can account for >41% of the weight of FeOOH [114], and increase the effective surface area of the FeOOH [114]. 5 hydration shells approximate to 46 wt % of FeOOH·mH2O.…”

Section: Role Of Hydration Shellsmentioning

confidence: 99%

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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Enthalpy of water adsorption and surface enthalpy of lepidocrocite (γ-FeOOH)

Cited by 63 publications

References 31 publications

The energetics of nanophase calcite

The energetics of nanophase calcite

Characterization of corrosion products formed on the surface of carbon steel by Raman spectroscopy

Desalination of Water Using ZVI (Fe0)

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