U-loss associated with laser-heating of hematite and goethite in vacuum during (U–Th)/He dating and prevention using high O2 partial pressure
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DOI: 10.1016/j.chemgeo.2019.119350
Abstract: Abstract Single-aliquot (U–Th)/He dating of hematite has been used to study iron-oxide precipitation in various environments, but we show there is an important challenge to the method: highly retentive hematite samples require temperatures of >1000 °C… read more here.
Keywords: hematite; hematite goethite; partial pressure; vacuum ... See more keywords
Electron transfer calculations between edge sharing octahedra in hematite, goethite, and annite
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DOI: 10.1016/j.gca.2020.04.036
Abstract: Abstract A key reaction underlying the charge transport in iron containing oxides, clays, micas is the Fe 2 + - Fe 3 + exchange reaction between edge-sharing iron octahedra. These reactions facilitate conduction in these… read more here.
Keywords: hematite goethite; polaron; edge sharing; electron transfer ... See more keywords
Adsorption kinetics of 4-n-nonylphenol on hematite and goethite
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DOI: 10.1016/j.jece.2018.05.052
Abstract: Abstract The adsorption of 4-n-Nonylphenol (4-n-NP), a persistent emerging contaminant, onto the surface of hematite and goethite was studied using Attenuated Total Reflectance (ATR)-FTIR spectroscopy. The adsorption kinetics for hematite and goethite show that equilibrium… read more here.
Keywords: adsorption; hematite goethite; kinetics nonylphenol; adsorption kinetics ... See more keywords
Bioflocculation of Hematite and Goethite Using Bacillus licheniformis (Bio-flocculation of Hematite and Goethite)
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DOI: 10.1080/08827508.2017.1281130
Abstract: ABSTRACT Cells and metabolite of Bacillus licheniformis were applied in the bioflocculation of hematite and goethite. Effects of bioreagent type, pH, and solid concentration on the settling process were studied. The highest settling of hematite… read more here.
Keywords: hematite goethite; hematite; bacillus licheniformis; bioflocculation hematite ... See more keywords