Christopher E. Bagwell
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View article: Examination of coal combustion management sites for microbiological and chemical signatures of groundwater impacts
Examination of coal combustion management sites for microbiological and chemical signatures of groundwater impacts Open
Coal combustion accounts for 40% of the world’s electricity and generates more than a billion tons of coal combustion products (CCP) annually, half of which end up in landfills and impoundments. CCP contain mixtures of chemicals that can b…
View article: Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer
Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer Open
We present the first measurement of cosmic-ray fluxes of Li
View article: Identifying Potential Geochemical and Microbial Impacts of Hydrogen Storage in a Deep Saline Aquifer
Identifying Potential Geochemical and Microbial Impacts of Hydrogen Storage in a Deep Saline Aquifer Open
Hydrogen is valuable commodity and a promising energy carrier for variable energy production. Storage of hydrogen may occur through injection of hydrogen or a hydrogen/methane gas blend in subsurface reservoirs. However, the geochemical an…
View article: Uptake of technetium and iodine (I−, IO3− and organo-I) by pecan biochar
Uptake of technetium and iodine (I−, IO3− and organo-I) by pecan biochar Open
View article: Geochemical and Microbial Dynamics of Hydrogen in a Methane Storage Reservoir
Geochemical and Microbial Dynamics of Hydrogen in a Methane Storage Reservoir Open
Hydrogen has been identified as a flexible energy carrier with zero or negative emission across multiple energy systems, and existing natural gas infrastructure could be leveraged if hydrogen gas (H2) was blended with methane (CH4). For ex…
View article: Hydrogen, Methane, Brine Flow Behavior, and Saturation in Sandstone Cores During H2 and CH4 Injection and Displacement
Hydrogen, Methane, Brine Flow Behavior, and Saturation in Sandstone Cores During H2 and CH4 Injection and Displacement Open
Large-scale underground hydrogen storage (UHS) is a critical component in the emerging hydrogen economy. Knowledge of multiphase flow behavior involving hydrogen in storage reservoir formations is crucial to characterizing hydrogen transpo…
View article: Biogeochemical Responses and Microbial Community Dynamics Responding to Experimental Hydrogen Storage Conditions
Biogeochemical Responses and Microbial Community Dynamics Responding to Experimental Hydrogen Storage Conditions Open
Hydrogen has been identified as a flexible energy carrier with zero or negative carbon emission across multiple energy sectors. There is tremendous capacity for deep geologic storage of H2 but many aspects of feasibility, reliability, safe…
View article: Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer
Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer Open
Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of the deuteron (D) flux are presented. The measurements are based on 21×106 D nuclei in the rigidity range from 1.9 to 21 GV collected from…
View article: Microbial Analysis of 100-N Borehole Samples: Estimation of Diesel and BTEX Degrading Bacterial Populations
Microbial Analysis of 100-N Borehole Samples: Estimation of Diesel and BTEX Degrading Bacterial Populations Open
Historical unplanned releases at the UPR-100-N-17 166-N Diesel Oil Supply Line Leak waste site located within the 100-NR-1 OU resulted in diesel fuel contamination of the unsaturated vadose zone and site groundwater. Enhanced in situ biore…
View article: Nitrate and Nitrite at Hanford – From Tanks to Natural Attenuation
Nitrate and Nitrite at Hanford – From Tanks to Natural Attenuation Open
This report provides an overview of the contemporary knowledge of nitrate and nitrite at Hanford throughout the waste processing flowsheet and subsurface, including identifying the biotic, abiotic, and mineral reaction processes that occur…
View article: Hydrogen, Methane, Brine Flow Behavior and Saturation in Sandstone Cores During H2 and Ch4 Injection and Displacement
Hydrogen, Methane, Brine Flow Behavior and Saturation in Sandstone Cores During H2 and Ch4 Injection and Displacement Open
View article: Development of Scalable Reactive Transport Framework for PFAS
Development of Scalable Reactive Transport Framework for PFAS Open
Research on PFAS chemicals is extensive and covers all aspects, including analytical quantification, determination of properties, toxicology, ex situ treatment, and in situ remediation. PFAS chemicals are very stable and thus persistent/re…
View article: Microbial based chlorinated ethene destruction
Microbial based chlorinated ethene destruction Open
A mixed culture of Dehalococcoides species is provided that has an ability to catalyze the complete dechlorination of polychlorinated ethenes such as PCE, TCE, cDCE, 1,1-DCE and vinyl chloride as well as halogenated ethanes such as 1,2-DCA…
View article: Subsurface Hydrogen and Natural Gas Storage (State of Knowledge and Research Recommendations Report)
Subsurface Hydrogen and Natural Gas Storage (State of Knowledge and Research Recommendations Report) Open
Global efforts to decrease carbon dioxide (CO2) emissions will result in increased reliance on renewable energy sources. One of the most significant obstacles to implementing this transition is the need for energy storage to com…
View article: Microbe-mineral dynamics within a ‘grass-to-glass’ soil profile at a late Iron Age archaeological site with implications for long-term storage of nuclear waste glasses
Microbe-mineral dynamics within a ‘grass-to-glass’ soil profile at a late Iron Age archaeological site with implications for long-term storage of nuclear waste glasses Open
View article: Characterizing the Influence of Organic Polymers on the Specific Reactivity of Particulate Remedial Amendments
Characterizing the Influence of Organic Polymers on the Specific Reactivity of Particulate Remedial Amendments Open
Commercially available particulate amendments demonstrate high reactivity for effective treatment of water soluble organic and inorganic contaminants in laboratory studies; however, transport of these particles is constrained in the subsur…
View article: Guidance for Monitoring Passive Groundwater Remedies Over Extended Time Scales
Guidance for Monitoring Passive Groundwater Remedies Over Extended Time Scales Open
Passive remediation can be appropriate where natural processes and actions such as institutional controls mitigate exposure to contaminated groundwater, achieving remedial action objectives and protectiveness of human health and the enviro…
View article: Combined Technologies for In Situ Remediation of Tc-99 and U in Subsurface Sediments
Combined Technologies for In Situ Remediation of Tc-99 and U in Subsurface Sediments Open
In this study, combinations of chemical remedies were tested in bench-scale batch experiments to evaluate a two-step reduction-sequestration approach to effectively stabilize high concentrations of inorganic contaminant mixtures. Bench tes…
View article: Analysis of Microbial Communities as Indicators of Microbially Induced Corrosion Potential in Stainless Steel Piping
Analysis of Microbial Communities as Indicators of Microbially Induced Corrosion Potential in Stainless Steel Piping Open
The 200 West Area Pump-and-Treat (200W P&T) facility is part of the final remedy decision for the 200 ZP-1 Operable Unit (OU) and is the interim remedial action for 200-UP-1 OU at the Hanford Site. The facility also treats water from other…
View article: Spectral Induced Polarization-Biogeochemical Relationships for Remediation Amendment Monitoring
Spectral Induced Polarization-Biogeochemical Relationships for Remediation Amendment Monitoring Open
Geophysical tools such as electrical resistivity (ER) can indirectly monitor subsurface changes in response to remedial injections. These methods exhibit relatively low spatial resolution compared to sediment core characterization but are …
View article: Guidance for Monitoring Passive Groundwater Remedies Over Extended Time Scales
Guidance for Monitoring Passive Groundwater Remedies Over Extended Time Scales Open
Passive remediation can be appropriate where natural processes and actions such as institutional controls mitigate exposure to contaminated groundwater, achieving remedial action objectives and protectiveness of human health and the enviro…
View article: Evaluation of Ammonia Discharge into PUREX Crib 216-A-37-1 and Nitrogen Species Fate in the Subsurface
Evaluation of Ammonia Discharge into PUREX Crib 216-A-37-1 and Nitrogen Species Fate in the Subsurface Open
Based on published data, this report identifies potential fate and transport mechanisms for the ammonium hydroxide condensate that was discharged to 216-A-37-1 Crib from Hanford fuel rod decladding before PUREX dissolution and separation o…
View article: Biotic degradation of acetonitrile. Limitations, controls and conversion rates
Biotic degradation of acetonitrile. Limitations, controls and conversion rates Open
This document has been prepared to support Washington River Protection Solutions (WRPS) in their evaluation of technologies to remediate organic compounds in the Liquid Effluent Retention Facility (LERF)/Effluent Treatment Facility (ETF) d…
View article: Non-contact electrochemical evaluation of biofilms
Non-contact electrochemical evaluation of biofilms Open
View article: Evaluation of gaseous substrates for microbial immobilization of contaminant mixtures in unsaturated subsurface sediments
Evaluation of gaseous substrates for microbial immobilization of contaminant mixtures in unsaturated subsurface sediments Open
View article: Enlisting Sedimentary Microbial Communities to Stabilize Long-Lived Contaminants in Mineral Phases
Enlisting Sedimentary Microbial Communities to Stabilize Long-Lived Contaminants in Mineral Phases Open
Extensive subsurface contamination remains at many former industrial and defense manufacturing sites, and effective remedial solutions are needed to slow or prevent its migration to groundwater.In this study, gaseous organic substrates wer…
View article: Microbial Methylation of Iodide in Unconfined Aquifer Sediments at the Hanford Site, USA
Microbial Methylation of Iodide in Unconfined Aquifer Sediments at the Hanford Site, USA Open
Incomplete knowledge of environmental transformation reactions limits our ability to accurately inventory and predictably model the fate of radioiodine. The most prevalent chemical species of iodine include iodate (IO3 -
View article: Review of Amendment Delivery and Distribution Methods, and Relevance to Potential In Situ Source Area Treatment at the Hanford Site
Review of Amendment Delivery and Distribution Methods, and Relevance to Potential In Situ Source Area Treatment at the Hanford Site Open
The U.S. Department of Energy’s Hanford Site in southeastern Washington State is a complex of multiple facilities where historical release events in the Central Plateau area have resulted in subsurface contamination of the vadose zone, a p…
View article: Chemical and Biological Characterization of the 200 West Pump-and-Treat for Performance Assessment and Operational Improvement
Chemical and Biological Characterization of the 200 West Pump-and-Treat for Performance Assessment and Operational Improvement Open
Contaminated groundwater in the 200W Area of the Hanford Site is being treated ex situ by the 200W Pump-and-Treat (P&T) Facility and the subsurface plume is under hydraulic containment. The 200W P&T Facility removes several contaminants of…
View article: A review of the behavior of radioiodine in the subsurface at two DOE sites
A review of the behavior of radioiodine in the subsurface at two DOE sites Open