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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Magnetite and zero-valent iron nanoparticles for the remediation of uranium contaminated environmental water
TL;DR: Both nanomaterials are demonstrated as ineffective on timescales >1 week, and further research is required to develop nanommaterials that exhibit greater reactivity and extended retention of inorganic contaminants in chemically complex environmental waters.
Journal ArticleDOI
Factors controlling As and U in shallow ground water, southern Carson Desert, Nevada
Alan H. Welch,Michael S. Lico +1 more
TL;DR: In this paper, As and U concentrations in ground water of the southern Carson Desert appear to be affected by evaporative concentration, redox reactions, and adsorption, and the relation of these elements with Cl suggest that most of the high concentrations can be attributed to evaporative concentrations of Carson River water, the primary source of recharge.
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Extraction of oxidized and reduced forms of uranium from contaminated soils: effects of carbonate concentration and pH.
Ping Zhou,Baohua Gu +1 more
TL;DR: Depending on site-specific geochemical conditions, the presence of small quantities of carbonate/bicarbonate could result in a rapid and greatly increased leaching and the mobilization of U(VI) from the contaminated soil.
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Uranium(VI) Adsorption on Goethite and Soil in Carbonate Solutions
M. C. Duff,C. Amrhein +1 more
TL;DR: In this paper, the authors found that elevated U concentrations in agricultural drainage waters from the San Joaquin Valley, CA, which are often disposed of in evaporation basins that are frequented by waterfowl, are due to the speciation of dissolved U(VI) into negatively charged carbonate complexes.
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Removal of uranium (VI) from aqueous solution by adsorption of hematite.
TL;DR: It was found that an increase in temperature resulted in a higher uranium (VI) loading per unit weight of the sorbent, and the negative Delta G(0) values of uranium ( VI) at different temperatures confirmed the adsorption processes were spontaneous.
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.