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Showing 1 to 7 of 7 for “"lepidocrocite"”.
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The reactivity of ferric (hydr)oxides towards dissolved sulphide
… with dissolved sulphide and ferrihydrite, lepidocrocite, and goethite were performed under well-defined conditions at pH 7 and at room temperature in a glove box with a special emphasis on the characterization of nanocrystalline products forming at different time steps over a reaction time …
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Role of Nanophase Oxides in Short-Term Atmospheric Corrosion of Structural Steels
… both carbon and weathering steel indicated that lepidocrocite and goethite were the predominant oxides to form following short-term exposures. The corrosion coatings were well layered for exposure times as early as 2 months. The layering was very similar to that observed on steel coupons exposed …
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Iron reduction mediated increases in carbon oxidation and phosphorus precipitation in on-site wastewater systems
… extent of mineralization with ferrihydrite and lepidocrocite favored as solid phase Fe3+ and chelated Fe3+ (with NTA or EDTA) as preferred soluble Fe3+ forms. Though chelated Fe3+ (with NTA or EDTA) removed phosphate at a significant level; ferric citrate, ferrihydrite and lepidocrocite showed …
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Formation and transformation kinetics of iron oxy-hydroxides and effects of adsorbed oxyanions
… transforms to hematite (Hm), goethite (Gt), and lepidocrocite (Lp). Although the Fh formation and transformation and oxyanion adsorption on its surface have been separately studied, the coupled interaction of these processes is only partly understood. The impact of oxyanion surface complexes on …
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The mobility of metals in acid mine drainage from abandoned coal mines
… of jarosite with minor amounts of goethite, lepidocrocite, ferrihydrite and gypsum, with ferrihydrite being the major component of only one precipitate sample. The presence of algae at one of the sampling sites appeared to act as a template for the precipitation of ferrihydrite in a low pH …
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Coupling of Oxidation-Reduction Reactions of Chromium, Iron and Manganese: Implications for the Fate and Mobility of Chromium in Aquatic Environments
… indicates that the iron oxides produced are lepidocrocite at pH 8, with more ferrihydrite in the presence of HA.</p><p>Building on previous knowledge of MnO2 as an oxidant for Cr-containing solids, we systematically evaluated the rates and products of the oxidation of Cr(III) in iron oxides …
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Effect of Amines as Corrosion Inhibitors for a Low Carbon Steel in Power Industry
Commonly used amines in power industry, including morpholine, DBU (1,8-diazabicyclo[5.4.0]undec-7-ene), and DMA (dimethylallylamine) were evaluated for their effect on AISI 1018 steel at 250oF. Samples were exposed to an autoclave containing amine added aqueous solution at pH of 9.5 for 1, 2, 4, 6, …