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Kevin Rosso

Institution
Pacific Northwest National Laboratory

Projects

Understanding coupled chemical-mechanical behaviors in minerals

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Xin Zhang
Project type
Contracted Time
This proposal aims to develop a comprehensive, unified understanding of how applied stress and interfacial chemistry couple to define mineral nanoparticle dissolution, recrystallization, and…

Probing Iron Oxide Mineral Aggregation Behavior with Soil Organic Matters

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Xin Zhang
Project type
Large-Scale EMSL Research
The goal of this project is to develop a fundamental understanding of iron oxide nanoparticle (NPs) aggregation mechanisms with soil organic matters (SOM). Heteroaggregation is a ubiquitous but…

Reduction of U6+ by magnetite and the rate of electron transfer

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Frances Skomurski
Project type
Large-Scale EMSL Research
The reductive adsorption of uranium(VI) by ferrous iron in magnetite (Fe3O4) is an important process for reducing the mobility of contaminants in groundwater and for sequestering radionuclides in the…

Mineral Reactivity and Transformations in Adsorbed Water Films

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
John Loring
Project type
Large-Scale EMSL Research
Transformations of minerals covered in thin films of adsorbed H2O are ubiquitous in nature and occur under unique chemical and physical constraints. But in contrast to bulk aqueous systems,…

Controlling the Thermal and Non-Thermal Reactivities of Metal Oxide Structures Through Nanoscaling - Controlling Reactivities of Metal Oxide Strcutures(Mike Henderson's BES Project - 43626)

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Michael Henderson
Project type
Exploratory Research
The constrained dimensions in nanoscaled materials produces unique chemical properties that will form the basis for important new technologies. A key scientific challenge is to understand how to…

Advances in Understanding Electron Transfer Kinetics at Environmental Interfaces

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Kevin Rosso
Project type
Large-Scale EMSL Research
This EMSL user proposal requests a continuation of EMSL access for a BER funded Environmental Molecular Sciences Institute (EMSI) project led by Dr. Rosso at PNNL. This project constitutes the PNNL…

Mechanisms of Fe(II)-Catalyzed Transformation of Fe(III)-(Oxyhydr)oxides

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Kevin Rosso
Project type
Large-Scale EMSL Research
Interaction of aqueous Fe(II) with major Fe(III)-oxides and oxyhydroxides yields the enigmatic catalytically reactive "sorbed Fe(II)" species and apparent facile recrystallization of even…

Conductivity of bacterial nanowires

Lead Institution
J. Craig Venter Institute
Principal Investigator
Yuri Gorby
Project type
Exploratory Research
Scanning tunneling microscopy will be used to image and characterize bacterial appendages produced by iron reducing bacteria that are believed to be involved with the extracellular reduction of iron…

Building a Predictive Understanding of Particle-Based Mineral Growth

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
James De Yoreo
Project type
Large-Scale EMSL Research
Traditional models of mineral formation through monomer-by-monomer addition have been challenged by recent evidence for crystallization through the addition of "particles," ranging from…

Thrust Area #2: Molecular modeling of electron transfer in Fe(III) oxides

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Kevin Rosso
Project type
Grand Challenge
Molecular modeling and simulation studies in combination with electron transfer theory calculations will be carried out to characterize the cytochrome mediated electron transfer process across the…

Electronic structure determination on mineral surfaces

Lead Institution
University of Michigan
Principal Investigator
Udo Becker
Project type
Exploratory Research
Periodic and cluster electronic structure calculations will be jointly performed on pyrite and galena surfaces to elucidate the energetics of indirect interactions between adsorbates and surface…

Exploring the processes that control uranyl reduction by magnetite and the growth of nanoparticulate surface precipitates by X-ray scattering and X-ray absorption spectroscopy

Lead Institution
Lawrence Berkeley National Laboratory
Principal Investigator
Glenn Waychunas
Project type
Exploratory Research
Uranium (U) has been released into the environment through mining operations, nuclear testing, and accidental spills, and is a contaminant in soils, sediments and groundwater at 70% of the Department…

Implications of U(IV)-silicate core-shell colloids for radionuclide transport

Lead Institution
University of Manchester
Principal Investigator
Samuel Shaw
Project type
Large-Scale EMSL Research
Here we will use a range of techniques to advance fundamental and predictive understanding of uranium colloids in the subsurface environment. Recent work has highlighted that U(IV)-silicate colloids…

(GC8)Computational Studies in Molecular Geochemistry and Biogeochemistry

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Herman Cho
Project type
Capability Research
The ability to predict the transport and transformations of contaminants within the subsurface is critical for decisions on virtually every waste disposal option, from remediation technologies such…

Multinuclear NMR Studies of and Earth and Energy Systems

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Karl Mueller
A team of researchers at PNNL carries out studies that utilize high-resolution nuclear magnetic resonance (NMR) spectroscopy in areas of national need for Basic Energy Sciences (BES). The research…

(GC8)Computational Studies in Molecular Geochemistry and Biogeochemistry

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Herman Cho
Project type
Capability Research
The ability to predict the transport and transformations of contaminants within the subsurface is critical for decisions on virtually every waste disposal option, from remediation technologies such…