Journal ArticleDOI
Adsorption of uranyl onto ferric oxyhydroxides: Application of the surface complexation site-binding model
TLDR
In this paper, the surface complexation-site binding model of Davis et al. was used to predict uranyl adsorption from aqueous electrolyte solution onto well-characterized goethite, amorphous ferric oxyhydroxide and hematite sols at 25°C.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1985-09-01. It has received 777 citations till now. The article focuses on the topics: Uranyl carbonate & Uranyl.read more
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Oxidative remobilization of biogenic uranium(IV) precipitates: effects of iron(II) and pH.
TL;DR: The oxidative remobilization of uranium from biogenic U(IV) precipitates was investigated in bioreduced sediment suspensions in contact with atmospheric O2 with an emphasis on the influence of Fe(II) and pH on the rate and extent of U release from the solid to the aqueous phase.
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Sorption of uranyl ions on titanium oxide studied by ATR-IR spectroscopy.
TL;DR: It is proposed that uranyl sorption on titanium oxide in the pH range 4-7 leads to the formation of one surface complex where uranium atoms have two different chemical environments.
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Ferrihydrite interaction with silicate and competing oxyanions: Geometry and Hydrogen bonding of surface species
TL;DR: In this paper, the surface area and particle size of the Si-Fe(III) co-precipitates were measured and interpreted with the charge distribution (CD) model using reactive site densities derived with a surface structural analysis.
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Biosorption of Uranium and Rare Earth Elements Using Biomass of Algae
TL;DR: The concentrations of rare earth elements (REEs) and uranium (U) in some brown algae samples taken on the coast of Niigata Prefecture were determined and the order of the concentration of REEs for each organ in Sargassum hemiphyllum was clarified.
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Uniform particles with a large surface area formed by hydrolysis of Fe2(SO4)3 with urea
TL;DR: In this paper, the synthesis of poorly crystalline iron(III) hydrous oxides and basic salts (ferrihydrite, schwertmannite, and jarosite) consisting of uniform spherical particles of characteristic shape with a diameter of ∼10 μm is described.
References
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Journal ArticleDOI
Uranium solution-mineral equilibria at low temperatures with applications to sedimentary ore deposits
TL;DR: The Gibbs free energies, enthalpies and entropies of 42 dissolved uranium species and 30 uranium-bearing solid phases have been critically evaluated from the literature and estimated when necessary for 25°C.
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Surface ionization and complexation at the oxide/water interface
TL;DR: In this article, a method for determination of intrinsic ionization and complexation constants of oxide surface sites from potentiometric titration data is reported using these experimental properties and the stoichiometry of surface reactions, surface charge, σo, adsorption density, Γi, and diffuse layer potentials, ψd, at the oxide/water interface.
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Surface ionization and complexation at the oxide/water interface II. Surface properties of amorphous iron oxyhydroxide and adsorption of metal ions
James A. Davis,James O. Leckie +1 more
TL;DR: In this paper, the site-binding model for the electrical double layer of hydrous oxides reported in a previous paper is applied to the adsorption of metal ions from dilute solution and to complex heterogeneous systems, i.e., amorphous iron oxyhydroxide.