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Geoffrey Bowers

Institution
St. Mary's College of Maryland
ORCID
ORCID logo 0000-0003-4876-9305

Projects

Binding Environment of Strontium-87 Nuclei
in DOE Waste Remediation Materials

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Karl Mueller
Project type
Capability Research
In previous research with model inorganic systems, we found that DFS-QCPMG NMR on the 21.14 T spectrometer at PNNL provided significant sensitivity enhancements, permitting studies of 87Sr nuclei…

Arsenic Coordination in Naturally Occurring Minerals and Salts

Lead Institution
Michigan State University
Principal Investigator
Robert Kirkpatrick
Project type
Capability Research
Arsenic is ubiquitous in soils and marine sediments, is a frequent by-product of smelting operations and coal-fired powerplants, is a common component of wood preservatives, and was traditionally…

Structure and Dynamics of Ions and Fluids at Organo-Mineral-Fluid Interfaces

Lead Institution
St. Mary's College of Maryland
Principal Investigator
Geoffrey Bowers
Project type
Large-Scale EMSL Research
Our research program strives to provide new insight into the fundamental molecular-scale dynamics, energetics, and reactivity of geochemically relevant solid-fluid interfaces through combined…

Nature of Natural Organic Matter Interactions with Mineral Surfaces

Lead Institution
St. Mary's College of Maryland
Principal Investigator
Geoffrey Bowers
Project type
Large-Scale EMSL Research
The interactions of organic- and bio-molecules with minerals play a central role in controlling soil biogeochemistry; plant nutrition; chemical processes in sediments, soils, sedimentary rocks and…

Influence of Adsorbed Organic Acids on Soil Mineral Wettability

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
John Loring
Project type
Large-Scale EMSL Research
Soil wettability is dictated by the extent to which hydrophilic mineral surfaces are covered by hydrophobic soil organic carbon (SOC) from bacterial decomposition, decaying plant matter, or root…

High-Field Aluminum-27 NMR of Simulated Tank Waste Precipitates

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Karl Mueller
Project type
Capability Research
Our proposal is to use high-field NMR spectroscopy to resolve and quantify aluminum phases in simulated tank waste precipitate samples. It is known that clay minerals weather into zeolite-type phases…

Impact of Organic-Inorganic Interactions on Pore Networks and Fluid Transport

Lead Institution
St. Mary's College of Maryland
Principal Investigator
Geoffrey Bowers
Project type
Exploratory Research
The proposed work takes advantage of unique EMSL capabilities to study how organic molecules chemically tethered to pore surfaces impact the pore sizes, pore connectivity, and dynamics of sorbed…

High-Field MAS NMR of
Strontium-87 in Environmental Samples

Lead Institution
St. Mary's College of Maryland
Principal Investigator
Geoffrey Bowers
Project type
Capability Research
Our proposal is to use ultra-high-field MAS NMR spectroscopy to study strontium nuclei in solid samples. Strontium is a quadrupolar nucleus (I = 9/2) with a very low gyromagnetic ratio, large…

High-Field NMR Investigations of
Strontium-87 in Environmental Samples

Lead Institution
St. Mary's College of Maryland
Principal Investigator
Geoffrey Bowers
Project type
Capability Research
Our proposal is to use ultra-high-field NMR spectroscopy to study strontium nuclei in solid samples. Strontium is a quadrupolar nucleus (I = 9/2) with a very low gyromagnetic ratio and low…

Sensitivity Enhancing NMR of
Strontium-87 Nuclei in Environmental Samples

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Karl Mueller
Project type
Capability Research
Our proposal is to combine sensitivity-enhancing pulse sequences and ultra-high magnetic fields to study strontium nuclei in clays and zeolites with solid-state NMR. NMR investigations of strontium…

High-resolution 27Al MAS NMR of Weathered Clays and Hanford Sediments

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Karl Mueller
Project type
Capability Research
In prior research at PNNL, kaolinite and montmorillonite minerals weathered under near-field exposure to simulated Hanford tank waste were examined with 10 kHz 27Al MAS NMR on the 17.61 T…