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Surface structures of gibbsite goethite and phosphated goethite
Nature, 1974INFRARED studies of surface hydroxyls on solids of high area have been limited to almost anhydrous materials prepared at elevated temperatures. These studies have made an important contribution to the understanding of surface catalysis, but have little relevance to adsorption processes that occur on moist surfaces at ambient temperatures.
J. D. RUSSELL +3 more
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2020
Iron oxides are ubiquitous in Earth’s crust. Its redox reactions in the environment not only control the cycling and availability of important elements such as C, N, S, but also influence the speciation and mobility of contaminants. During the last few decades, significant advances have been made in understanding the reaction of Fe(II) with Fe(III ...
Luiza Notini de Andrade +6 more
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Iron oxides are ubiquitous in Earth’s crust. Its redox reactions in the environment not only control the cycling and availability of important elements such as C, N, S, but also influence the speciation and mobility of contaminants. During the last few decades, significant advances have been made in understanding the reaction of Fe(II) with Fe(III ...
Luiza Notini de Andrade +6 more
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Adsorption of MCPA on goethite and humic acid-coated goethite
Chemosphere, 2010Anionic pesticides are adsorbed on the mineral oxide fraction of the soil surface but considerably less on the organic fraction, so that the presence of organic matter causes a decrease in the amount of pesticide adsorbed, and may affect the mechanism of adsorption.
A, Iglesias +5 more
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Water Vapor Adsorption on Goethite
Environmental Science & Technology, 2013Goethite (α-FeOOH) is an important mineral contributing to processes of atmospheric and terrestrial importance. Their interactions with water vapor are particularly relevant in these contexts. In this work, molecular details of water vapor (0.0-19.0 Torr; 0-96% relative humidity at 25 °C) adsorption at surfaces of synthetic goethite nanoparticles ...
Xiaowei, Song, Jean-François, Boily
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Morphology of synthetic goethite particles
Journal of Colloid and Interface Science, 2004The specific surface area of synthetic goethite depends on the preparation: the Fe(III):OH ratio, the rate of base titration of Fe salt, and the temperature and time of crystallization. The crystals also have different morphologies as determined by SEM or TEM. Carbon coating is used to improve the quality of SEM images of nonconducting specimens.
Kosmulski, Marek +3 more
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Competitive sorption of Cu and Cr on goethite and goethite–bacteria complex
Chemical Engineering Journal, 2012Abstract Sorption of Cu and Cr in single and binary sorbate systems on goethite and goethite–Bacillus thuringiensis complex was studied. It was observed that the initial sorption rate and sorption capacity of heavy metals on goethite–B. thuringiensis complex were greater than that on goethite in single system at studied pH. The competitive ability of
ZHU, jun +3 more
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Gibbsite and Goethite Solubility
Soil Science Society of America Journal, 20052‐Ketogluconate (kG) is a microbial byproduct that has been isolated from the rhizosphere of several plants and has been found to accumulate around bacteria adhering to rock surfaces. It has long been suspected that kG may play a role in enhancing the bioavailability of soil nutrients.
Michael E. Essington +2 more
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Multisite Adsorption of Cadmium on Goethite
Journal of Colloid and Interface Science, 1996Recently a new general ion adsorption model has been developed for ion binding to mineral surfaces (Hiemstra and van Riemsdijk, 1996). The model uses the Pauling concept of charge distribution (CD) and is an extension of the multi-site complexation (MUSIC) approach. In the CD-MUSIC model the charge of an adsorbing ion that forms an inner sphere complex
Venema, P. +2 more
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Arsenic−Bicarbonate Interaction on Goethite Particles
Environmental Science & Technology, 2007The As(V) and As(III) interaction with HCO3 has been studied for goethite systems using a pH and As concentration range that is relevant for field situations. Our study shows that dissolved bicarbonate may act as a competitor for both As(V) and As(III). In our closed systems, the largest effect of bicarbonate occurs at the lowest experimental pH values
Stachowicz, M. +2 more
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Journal of Physics: Condensed Matter, 1995
A spin-flop transition is observed when a field of 20 T is applied parallel to the b axis of a specimen of natural goethite at 4.2 K. The goethite orders in a four-sublattice antiferromagnetic structure with the sublattice magnetizations inclined at +or-13 degrees to b, and an iron moment of 3.90 mu B. There is a small net ferromagnetic moment of 0.004
J M D Coey +7 more
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A spin-flop transition is observed when a field of 20 T is applied parallel to the b axis of a specimen of natural goethite at 4.2 K. The goethite orders in a four-sublattice antiferromagnetic structure with the sublattice magnetizations inclined at +or-13 degrees to b, and an iron moment of 3.90 mu B. There is a small net ferromagnetic moment of 0.004
J M D Coey +7 more
openaire +1 more source