Jeffrey Catalano

Nucleation and Precipitation Processes that Affect U(VI) Sequestration following Phosphate Addition to Contaminated Sediments

Lead Institution

Washington University in St. Louis

Principal Investigator

Jeffrey Catalano

Project type

Special Science

Our research investigates the potential applicability of phosphate injection as an in-situ remediation strategy to decrease aqueous U(VI) concentrations at contaminated DOE sites. Our goal is to…

The Impacts of Biogeochemical Sulfur Cycling on Organic Matter Composition in Terrestrial Wetlands

Lead Institution

Washington University in St. Louis

Principal Investigator

David Fike

Project type

Limited Scope

Freshwater wetlands are critical areas of both organic matter sequestration and greenhouse gas release, the rates of which depend strongly on the characteristics of organic matter. In this…

Visualizing Uranium Atom Exchange in UO2 Driven by Biogeochemical Processes

Lead Institution

Washington University in St. Louis

Principal Investigator

Daniel Giammar

Project type

Large-Scale EMSL Research

Redox-driven recrystallization of metal oxides is an exciting environmental phenomenon that can influence biogeochemical cycles of both nutrients and contaminants. This phenomena occurs in systems…

XPS Investigation of Surface Passivation during Fe(II)-activated Recrystallization of Al-, Cr-, and Sn-substituted Goethite and Hematite

Lead Institution

Washington University in St. Louis

Principal Investigator

Jeffrey Catalano

Project type

Exploratory Research

Microbially-mediated iron redox cycling results in secondary abiotic reactions between aqueous Fe(II) and solid Fe(III) oxide minerals. These reactions induce iron oxide minerals such as goethite and…

FIB/TEM Study of Uranium-Phosphate Mineralization in Subsurface Sediments

Lead Institution

Washington University in St. Louis

Principal Investigator

Jeffrey Catalano

Project type

Large-Scale EMSL Research

Uranium contamination of the subsurface at DOE sites has resulted from past mining, milling, and waste disposal processes. Phosphate addition has been proposed as a potential remediation strategy for…

Projects

Nucleation and Precipitation Processes that Affect U(VI) Sequestration following Phosphate Addition to Contaminated Sediments

The Impacts of Biogeochemical Sulfur Cycling on Organic Matter Composition in Terrestrial Wetlands

Visualizing Uranium Atom Exchange in UO2 Driven by Biogeochemical Processes

XPS Investigation of Surface Passivation during Fe(II)-activated Recrystallization of Al-, Cr-, and Sn-substituted Goethite and Hematite

FIB/TEM Study of Uranium-Phosphate Mineralization in Subsurface Sediments