Andrew Felmy

The Role of Interfacial Processes on Mineral Transformations in Wet Supercritical CO2

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Large-Scale EMSL Research

We propose a comprehensive experimental and theoretical investigation of the role of interfacial water and CO2 on the energies, mechanisms, and rates of reactivity of a series of orthosilicate and…

Computational Investigation of Acid Base, Surface Complexation, and Oxidation/Reduction Reaction Mechanisms on Iron Oxide and Iron Silicate Surfaces (Felmy Rustad BES, PNNL SCOPE #22130).

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Exploratory Research

This project is directed at providing a molecular scale understanding of surface complexation reactions occurring at oxide, oxyhydroxide, and silicate mineral surfaces through the use of molecular…

The Influence of Reaction Pathways on the Reduction of U(VI) to U(IV): The Role of the Intermediate U(V) Species

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Eugene Ilton

Project type

Large-Scale EMSL Research

This proposal is focused on the interfacial oxidation/reduction mechanisms of polyvalent metal ions important in subsurface systems. The current research is targeted at unraveling the reaction…

Role of Microenvironments and Transition Zones in Field scale microbial ecology and biogeochemistry

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Exploratory Research

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

Role of Microenvironments and Transition Zones in Field Scale Microbial Ecology and Biogeochemistry

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Limited Scope

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

Multiscale Processes of Heteroepitaxial Nucleation and Growth at Mineral-Water Interfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Sebastien Kerisit

Project type

Exploratory Research

The goal of the proposed research is to elucidate the mechanisms and quantify the rates of heteroepitaxial nucleation and growth at mineral-water interfaces. Despite several examples of heteroepitaxy…

The Role of Microenvironments and Physicochemical Subsurface Components on Field Scale Biogeochemistry and Contaminant Mobility

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Exploratory Research

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

Role of Microenvironments and Transition Zones in Subsurface Reactive Contaminant Transport

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

The Role of Interfacial Water on Mineral Transformations in Wet Supercritical CO2

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Large-Scale EMSL Research

We propose a comprehensive experimental and theoretical investigation of the molecular mechanisms governing the role of interfacial water in the reactivity of mineral phases in supercritical carbon…

Towards a Predictive Thermodynamic Model for Oxidation States of Uranium Incorporated in Fe (hydr)oxides

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Eugene Ilton

Project type

Large-Scale EMSL Research

Bacterially facilitated and abiotic heterogeneous reduction of UVI to UIV has been intensively studied due to the vastly different solubility of hexavalent and tetravalent uranium, with ramifications…

Grand Challenge in Biogeochemistry

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James Fredrickson

Project type

Grand Challenge

Do multiheme cytochromes associated with the outer membrane of metal reducing bacteria (mtrC in Shewanella oneidensis and omcB in Geobacter sulfurreducens, for example) transfer electrons to Fe(III)…

Role of Microenvironments and Transition Zones in Subsurface Reactive Contaminant Transport

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

Development of Microscopically-Based Models for Prediction of the Impact of Surface Grain Coating on Mineral Dissolution and Leaching Rates

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Large-Scale EMSL Research

Over the past two decades, molecular level information on the composition, structure, and nature of impurities in naturally occurring mineral phases and anthropogenic subsurface materials has become…

Molecular-scale controls on heteroepitaxy at mineral-water interfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Sebastien Kerisit

Project type

Large-Scale EMSL Research

The objective of the proposed research is to elucidate and quantify the molecular-scale mechanisms of heteroepitaxial nucleation and growth at mineral-water interfaces. Despite several examples of…

Studies on 1,2,3-trichloropropane (TCP) and its derivatives

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Eric Bylaska

Project type

Large-Scale EMSL Research

The widespread use of 1,2,3-trichloropropane (1,2,3-TCP) as solvents in paint and varnish removal, cleaning and degreasing, etc. has resulted in it becoming an emerging pollutant in the environment …

Hydro-Biogeochemical Process Dynamics in the Groundwater-Surface Water Interaction Zone

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL.PNNL Scientific Focus Area. The PNNL SFA will develop a predictive understanding…

Role of Microenvironments and Transition Zones in Subsurface Reactive Contaminant Transport

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Exploratory Research

The PNNL Scientific Focus Area (SFA) will resolve critical Hanford and basic subsurface science issues through integrated, multi-disciplinary, science-theme focused research on the role of…

Hydro-Biogeochemical Process Dynamics in the Groundwater-Surface Water Interaction Zone

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL.PNNL Scientific Focus Area. The PNNL SFA will develop a predictive understanding…

The Aqueous Thermodynamics and Complexation Reactions of Anionic Silica and Uranium Species to High Concentration. (Felmy ESMP-silicate, PNNL Scope #30944)

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Exploratory Research

Highly basic tank wastes contain several important radionuclides, including 90Sr, 99Tc, and 60Co, as well as actinide elements (i.e., isotopes of U, Pu, and Am). These highly basic tank wastes are …

The Transformation of Tetrahedral to Octahedral Coordination in Anions of Interest in High-Level Tank Waste

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Jian-zhi Hu

Project type

Exploratory Research

We propose to use nuclear magnetic resonance (NMR), Raman and Fourier transform-infrared (FT-IR) spectroscopy in combination with computational modeling to study the conversion of soluble tetrahedral…

The Role of Interfacial Processes on Mineral Transformations in Wet Supercritical CO2

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Exploratory Research

We propose a comprehensive experimental and theoretical investigation of the role of interfacial water and CO2 on the energies, mechanisms, and rates of reactivity of a series of orthosilicate and…

The Transformation of Tetrahedral to Octahedral Coordination in Anions of Interest in High-Level Tank Waste

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Jian-zhi Hu

Project type

Large-Scale EMSL Research

We propose to use nuclear magnetic resonance (NMR), Raman and Fourier transform-infrared (FT-IR) spectroscopy in combination with computational modeling to study the conversion of soluble tetrahedral…

The Impact of Vapor Phase Species on the Corrosion Potential of Hanford Double Shell Tanks.

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Exploratory Research

The goal of the proposed project is to develop a sound technical basis for control of corrosion in the vapor space and the liquid/air interface (VS/LAI) in the Hanford Double Shell Tanks. …

Unraveling chemical speciation and interfacial dynamics in complex, heterogeneous
environments to efficiently process high-level radioactive wastes

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Jian-zhi Hu

We propose to use NMR in combination with computational modeling, to study the conversion of soluble tetrahedral aluminum (Al) species to octahedrally coordinated Al-bearing mineral precipitates…

Projects