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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Uranium reduction and resistance to reoxidation under iron-reducing and sulfate-reducing conditions
TL;DR: The results indicate that the Clostridium-dominated iron-reducing communities created conditions that were more favorable for uranium stability with respect to reoxidation despite the fact that fewer electron equivalents were added to these systems.
Journal ArticleDOI
Low-Temperature Oxygen Trap for Maintaining Strict Anoxic Conditions
TL;DR: In this article, a low-temperature O2 trap was designed in order to achieve strict anoxic conditions, motivated by observation of slow oxidation of Fe(II) in an anaerobic chamber, leading to an estimated 3.8×10-7atm O2.
Journal ArticleDOI
Uranium incorporation into aluminum-substituted ferrihydrite during iron(II)-induced transformation
Michael S. Massey,Juan S. Lezama-Pacheco,Juan S. Lezama-Pacheco,F. Marc Michel,Scott Fendorf +4 more
TL;DR: The process of U incorporation into Al-goethite may be a potential long-term sink of U in subsurface environments where Al-substituted iron oxides are common, albeit at lower levels of incorporation with increasing Al content.
Journal ArticleDOI
Towards a common thermodynamic database for speciation models
Jan van der Lee,Claire Lomenech +1 more
TL;DR: In this article, the authors propose a methodological approach to achieve a common, operational database including the reactions and constants of these phases, provided they are coherent with the general thermodynamic laws.
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Production of hydroxyl radicals from oxygenation of simulated AMD due to CaCO3-induced pH increase.
TL;DR: Findings from this study suggest that the oxidizing impact of OH on contaminants transformation as well as organic carbon mineralization should be concerned for the oxygenation of AMD in karst areas.
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.