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
Extensive oxidative weathering in the aftermath of a late Neoproterozoic glaciation: Evidence from trace element and chromium isotope records in the Urucum district (Jacadigo Group) and Puga iron formations (Mato Grosso do Sul, Brazil)
Robert Frei,L. N. Dossing,Claudio Gaucher,Paulo César Boggiani,Karin Margarita Frei,T. Bech Árting,Sean A. Crowe,Bernardo Tavares Freitas +7 more
TL;DR: Babinski et al. as mentioned in this paper showed that the largest sedimentary Fe and associated Mn formation (IF;MnF) deposits of Cryogenian age in the world are associated with diamictites and shales.
Journal ArticleDOI
Geochemical control on the reduction of U(VI) to mononuclear U(IV) species in lacustrine sediments
Lucie Stetten,Lucie Stetten,Arnaud Mangeret,Jessica Brest,Marina Seder-Colomina,P. Le Pape,Maya Ikogou,Nina Zeyen,A. Thouvenot,Anthony Julien,Gilles Alcalde,Jean-Louis Reyss,B. Bombled,Christophe Rabouille,Luca Olivi,Olivier Proux,Charlotte Cazala,Guillaume Morin +17 more
TL;DR: In this article, the role of early diagenesis on the evolution of U speciation and mobility in sediments from an artificial lake located downstream from a former mining site was examined.
Journal ArticleDOI
Redox reactions in the Fe-As-O2 system.
TL;DR: In a series of anoxic experiments, Fe(II) was found to reduce As(V) in the presence of goethite, but not in homogeneous solution, and the reaction rate increased with increasing pH and Fe( II) concentration, but in all cases was relatively slow.
Book ChapterDOI
Uranium Bioreduction and Biomineralization
Rehemanjiang Wufuer,Wei Yongyang,Qinghua Lin,Huawei Wang,Wenjuan Song,Wen Liu,Daoyong Zhang,Xiangliang Pan,Geoffrey M. Gadd +8 more
TL;DR: The objective of this review is to provide an understanding of recent developments in uranium bioreduction and biomineralization in relation to relevant microorganisms, mechanisms, influential factors, and obstacles.
Journal ArticleDOI
Neptunium redox speciation at the illite surface
Rémi Marsac,Nidhu lal Banik,Johannes Lützenkirchen,Christian M. Marquardt,Kathy Dardenne,Dieter Schild,Joerg Rothe,Alexandre Diascorn,T. Kupcik,Thorsten Schäfer,Horst Geckeis +10 more
TL;DR: In this paper, the authors investigated the effect of Np(V) reduction in the presence of a sorbing mineral phase on the redox state and surface complexation of a purified Na-illite.
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.