Journal ArticleDOI
Surface catalysis of uranium(VI) reduction by iron(II)
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In this article, the authors investigated the kinetic effect of specific adsorption interactions on the chemical reduction of uranyl (UVIO22+) by ferrous iron, and derived a rate law for surface-catalyzed U(VI) reduction by Fe(II), d[U(VI)] dt =−k[≡ Fe III OFe II OH 0 ][U( VI)] ads where the bimolecular rate constant k has a value of 399 ± 25 M−1 min−1 at 25°C.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1999-10-01. It has received 647 citations till now. The article focuses on the topics: Uranyl & Reaction rate constant.read more
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Influence of Uranyl Speciation and Iron Oxides on Uranium Biogeochemical Redox Reactions
TL;DR: In this paper, the authors examined the impact of speciation changes induced by dissolved Ca on the extent and rate of reduction of U(VI) in anaerobic environments, and examined the effect of Fe(III) (hydr)oxides (ferrihydrite, goethite and hematite) varying in free energies of formation on U reduction.
Journal ArticleDOI
Effect of solubility on the determination of the protonable surface site density of oxyhydroxides.
TL;DR: The impact of the dissolved quantity of aluminum on the calculation of surface charge from titration experiments of hydrated gamma-alumina was investigated and two methods were developed to correct this effect: direct determination of aluminum in solution in batch Titration experiments and application of a dissolution rate model in continuous titration experiment.
Journal ArticleDOI
Identification of Fluoride and Phosphate Binding Sites at FeOOH Surfaces
TL;DR: In this paper, Fourier transform infrared (FTIR) spectroscopy was used to examine adsorption products formed on iron oxyhydroxide surfaces in aqueous solutions of sodium fluoride and monosodium phosphate.
Journal ArticleDOI
Metallic iron for water treatment: leaving the valley of confusion
Susanne Makota,Arnaud Igor Ndé-Tchoupé,Hezron T. Mwakabona,Hezron T. Mwakabona,Hezron T. Mwakabona,Raoul Tepong-Tsindé,Raoul Tepong-Tsindé,Chicgoua Noubactep,Achille Nassi,Karoli N. Njau +9 more
TL;DR: In this paper, the authors re-establishes the complex nature of the Fe0/H2O system while recalling that proper system analysis and chemical thermodynamics are the most confident ways to solve any conflicting situation in Fe0 environmental remediation.
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Influence of Acidic and Alkaline Waste Solution Properties on Uranium Migration in Subsurface Sediments
TL;DR: Results show that acidic or alkaline co-contaminant disposal with uranium can result in complex depth- and time-dependent changes in uranium dissolution/precipitation reactions and uranium sorption, which alter the uranium migration mass, concentration, and velocity.
References
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Book
Critical Stability Constants
TL;DR: Erratum to: Aminocarboxylic Acids to: Iminodiacetic Acid Derivatives to: Peptides to: Aliphatic Amines to: Protonation Values for other Ligands.
Book
Solutions, Minerals and Equilibria
Robert M. Garrels,C. L. Christ +1 more
TL;DR: In this article, the authors provide a thorough, up-to-date coverage of controls on the chemical quality of surface and ocean waters. But they do not provide a detailed analysis of the results of their experiments.
Book
Fourier Transform Infrared Spectrometry
TL;DR: The theory and instrumentation for Fourier transform infrared spectrometry are discussed, and important areas of chemistry include atmospheric monitoring, surface chemistry, and on-line identification of chromatographically separated materials.
Book
Vogel's textbook of quantitative chemical analysis
TL;DR: In this paper, the principles of reaction in solution are discussed and the basis of separarative methods are discussed, as well as the safety units of Reagent Purity and Reagent Reactions in Solution.
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.