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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An in situ quick-EXAFS and redox potential study of the Fe(II)-catalysed transformation of ferrihydrite
TL;DR: In this article, the authors examined the kinetics of the Fe(II)-accelerated conversion of ferrihydrite to goethite using quick-scanning X-ray absorption spectroscopy (XAS) and measured the associated changes in oxidation reduction potential (ORP).
Journal ArticleDOI
Abiotic U(VI) reduction by sorbed Fe(II) on natural sediments
Patricia M. Fox,James A. Davis,Ravi K. Kukkadapu,David M. Singer,John R. Bargar,Kenneth H. Williams +5 more
TL;DR: In this article, the extent of 57Fe oxidation decreased with increasing 57Fe(II) uptake, such that 98% was oxidized at 7.3μmol/g Fe and 41% at 39.6% of Fe, indicating that the sediments had a limited capacity for oxidation of Fe(II).
Journal ArticleDOI
QSAR study of the reduction of nitroaromatics by Fe(II) species.
TL;DR: Results of experiments in which the surface area loading of ferric oxides was systematically varied indicate that the reactivity of mineral-surface-associated Fe( II), Fe(II)surf, toward the reduction of p-cyanonitrobenzene (CNNB) decreased in the order hematite > goethite > lepidocrocite > ferrihydrite and the surface density did not play a crucial role in determining the observed reactivity trend.
Journal ArticleDOI
Mineral- and Base-Catalyzed Hydrolysis of Organophosphate Flame Retardants: Potential Major Fate-Controlling Sink in Soil and Aquatic Environments.
TL;DR: Hydrolysis of six OPFRs and three structural analogues in the absence and presence of metal (hydr)oxide minerals suggests that mineral-catalyzed hydrolysis may be a major fate-controlling sink in natural environments.
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Uranium(VI) interactions with mackinawite in the presence and absence of bicarbonate and oxygen.
TL;DR: Near-neighbor coordination consisting of uranium-oxygen and uranium-uranium distances indicates the formation of uraninite in the presence and absence of bicarbonate, suggesting reductive precipitation as the dominant removal mechanism.
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.