Journal ArticleDOI
Surface catalysis of uranium(VI) reduction by iron(II)
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TLDR
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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Comparison of arsenic(V) and arsenic(III) sorption onto iron oxide minerals: implications for arsenic mobility.
Suvasis Dixit,Janet G. Hering +1 more
TL;DR: The sorption data indicate that, under most of the chemical conditions investigated in this study, reduction of As(V) in the presence of HFO or goethite would have only minor effects on or even decrease its mobility in the environment at near-neutral pH conditions.
Journal ArticleDOI
Biogeochemical Redox Processes and their Impact on Contaminant Dynamics
Thomas Borch,Ruben Kretzschmar,Andreas Kappler,Philippe Van Cappellen,Matthew Ginder-Vogel,Andreas Voegelin,Kate M. Campbell +6 more
TL;DR: Recent advances in the understanding of biogeochemical redox processes are highlighted and their impact on contaminant fate and transport, including future research needs are highlighted.
Journal ArticleDOI
Surface complexation of ferrous iron and carbonate on ferrihydrite and the mobilization of arsenic.
TL;DR: Model calculations confirm that sorption of particularly carbonate at common soil and groundwater concentrations reduces the sorption capacity of arsenic on ferrihydrite significantly, a cause for the high concentrations of arsenic in groundwater in Bangladesh.
Journal ArticleDOI
Aquatic surface chemistry: Edited by Werner Stumm. Wiley, New York. 1987. $69.95 (ISBN 0471822951)
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GeoChip: a comprehensive microarray for investigating biogeochemical, ecological and environmental processes
Zhili He,Terry J. Gentry,Terry J. Gentry,Christopher W. Schadt,Liyou Wu,Liyou Wu,Jost Liebich,Jost Liebich,Song C. Chong,Zhijian Huang,Zhijian Huang,Wei-Min Wu,Baohua Gu,Phil Jardine,Craig S. Criddle,Jizhong Zhou,Jizhong Zhou +16 more
TL;DR: This is the first comprehensive microarray currently available for studying biogeochemical processes and functional activities of microbial communities important to human health, agriculture, energy, global climate change, ecosystem management, and environmental cleanup and restoration.
References
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Journal ArticleDOI
Adsorption of uranyl onto ferric oxyhydroxides: Application of the surface complexation site-binding model
TL;DR: In this paper, the surface complexation-site binding model of Davis et al. was used to predict uranyl adsorption from aqueous electrolyte solution onto well-characterized goethite, amorphous ferric oxyhydroxide and hematite sols at 25°C.
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Multisite proton adsorption modeling at the solid/solution interface of (hydr)oxides: A new approach: II. Application to various important (hydr)oxides
TL;DR: In this article, the charging behavior of metal (hydr)oxides has been investigated at the solid/solution interface of various types of O(H) and OH(H), which differ in the number of coordinating metal ions.
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The oxidation kinetics of Fe(II) in seawater
TL;DR: In this article, the rate constant of Fe(II) in water and seawater was found to be a second degree function of pH over the pH range of 75 to 85 at 5°C and 60 to 80 at 25°C.