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
Citations
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Journal ArticleDOI
Linking Thermodynamics to Pollutant Reduction Kinetics by Fe2+ Bound to Iron Oxides.
Sydney M. Stewart,Thomas B. Hofstetter,Thomas B. Hofstetter,Prachi Joshi,Christopher A. Gorski +4 more
TL;DR: This framework provides mechanistic insights into how the thermodynamic favorability of electron transfer from oxide-bound Fe2+ relates to redox reaction kinetics.
Journal ArticleDOI
Redox-sensitive element uptake in north-east Atlantic Ocean sediments (Benthic Boundary Layer Experiment sites)
John Thomson,S Nixon,Ian W. Croudace,Thomas F. Pedersen,L. Brown,Gordon Cook,Angus B. MacKenzie +6 more
TL;DR: In this paper, the oxic post-oxoxoxidation boundary in the sediments at Feni Drift and Rockall Bank has been estimated by using a color change in the sediment layers and 210Pbexcess profiles.
Journal ArticleDOI
Effects of aqueous complexation on reductive precipitation of uranium by Shewanella putrefaciens
Johnson R. Haas,Abraham Northup +1 more
TL;DR: In this article, the effects of aqueous complexation on rates of dissimilatory reductive precipitation of uranium by Shewanella putrefaciens were examined, and the results indicated that natural microbial-aqueous systems containing abundant organic matter can inhibit the formation of insoluble amorphous UO2.
Journal ArticleDOI
Fe(II) - Fe(III) electron transfer in a clay mineral with low Fe content
TL;DR: In this article, the authors used Mossbauer spectroscopy to show that Fe(II) reduces an extensive amount of Fe(III) in a low-Fe clay mineral (Wyoming montmorillonite, SWy-2, 2.3 wt % Fe).
Journal ArticleDOI
Electrochemical Analysis of Changes in Iron Oxide Reducibility during Abiotic Ferrihydrite Transformation into Goethite and Magnetite.
Meret Aeppli,Meret Aeppli,Ralf Kaegi,Ruben Kretzschmar,Andreas Voegelin,Thomas B. Hofstetter,Thomas B. Hofstetter,Michael Sander +7 more
TL;DR: It is shown that the decreases inIron oxide reduction extents and rates during ferrihydrite transformations can be linked to the concurrent changes in iron oxide mineralogy.
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.