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
Citations
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Journal ArticleDOI
Influence of contact time on the extraction of 233uranyl spike and contaminant uranium from Hanford Site sediment
TL;DR: In this article, 233Uranyl nitrate was added to uranium (U) contaminated Hanford 300 Area sediment and incubated under moist conditions for 1 year, and sediment extractions were performed using either batch or dynamic (sediment column flow) chemical extraction techniques.
Book ChapterDOI
Chapter 4 Biogeochemical cycles and remobilisation of the actinide elements
Katherine Morris,Robert Raiswell +1 more
TL;DR: In this article, the authors reviewed the inputs of key actinide elements to the natural environment to examine global cycling of U in the context of the global iron cycle and to review the possible roles of microbial processes in the cycling and remobilization behavior of the actinides.
Journal ArticleDOI
The geochemistry of uranium in pore waters from lake sediments
TL;DR: The concentration of pore water uranium in six sediments from oligotrophic, mesotrophic and acidotrophic lakes was measured by inductively coupled plasma-mass spectrometry as discussed by the authors.
Journal ArticleDOI
Fate and transport of uranium (VI) in weathered saprolite
TL;DR: The surface complexation model with calibrated parameters was able to predict the general sorption behavior relatively well, but failed to reproduce solid concentration effects, implying the importance of appropriate design if batch experiments are to be utilized for dynamic systems.
Journal ArticleDOI
An XPS Study of Interaction of Neptunyl(V) in Aqueous Solution with Goethite ( -FeOOH)
Yu. A. Teterin,St.N. Kalmykov,Alexander P. Novikov,Yu. A. Sapozhnikov,L. Dj. Vukcevic,A. Yu. Teterin,Konstantin I. Maslakov,I. O. Utkin,A. B. Khasanova,N. S. Shcherbina +9 more
TL;DR: In this paper, the ionic and elemental composition of the goethite surface and neptunium complexes formed on the surface were studied by X-ray photoelectron spectroscopy.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.