SFA Team Members
John Bargar
(Lead PI) John is an environmental geochemist and senior staff scientist at the SLAC National Accelerator Laboratory. John's expertise lies in the area of low-temperature aquatic geochemistry, with emphasis on synchrotron-based x-ray spectroscopy and scattering techniques. John's research interests include the structure-composition-reactivity relationships of environmental biogenic oxides and the fate and environmental remediation of heavy metal contaminants in natural waters.
Rizlan Bernier-Latmani
(PI) Rizlan is an assistant professor of environmental microbiology at École Polytechnique Fédérale de Lausanne (EPFL). Her research interests are focused on the interactions between bacteria and metals including biomineral formation and microbially-driven mineral corrosion. She is interested in the biological mechanism of metal reduction, the role of biomolecules in determining characteristics of the biomineral products and how these processes affect the environmental impact of contaminants.
Gordon E. Brown, Jr
(PI) Gordon is the Dorrell William Kirby Professor of Geological and Environmental Science at Stanford University. Gordon's expertise is in the area of applications of synchrotron-based X-ray spectroscopy to environmental geochemistry with emphasis on surface chemistry of oxides. His research interests include surface and interface geochemistry, environmental fate of heavy metals, and applications of synchrotron radiation in geochemistry and mineralogy.
Scott Fendorf
(PI) Scott is a Professor of Soil Biogeochemistry at Stanford university. Scott's expertise and interests are in the chemical and biological processes that control the fate and movement of elements (ranging from carbon to arsenic to uranium) within soils, sediments, and surface waters. Scott's research group examines the chemical environments that develop as a result of both biotic and abiotic processes and strives to account for the physical complexity and hydrology of natural settings.
Dan Giammar
(PI) Dan is an Assistant Professor in the Department Energy, Environmental, and Chemical Engineering at Washington University in St. Louis, where he is also a member of the Center for Materials Innovation and the Environmental Studies Program. His research focuses on chemical reactions that affect the fate and transport of heavy metals and radionuclides in natural and engineered aquatic systems.
(PI) Juan is a post-doctoral research associate on the SLAC SFA project. He earned his Ph.D. in Applied Physics from the Centro de Investigacion y de Estudios Avanzados (CINVESTAV), Mérida, Yucatán, México in 2009, where his dissertation project focused on the lattice effects and nano-scale inhomogeneities in uranium and plutonium oxides and superconductors. Juan's research interests include electronic structure calculations, XAFS spectroscopy and synchrotron X-ray diffraction on complex environmental materials, and he brings great depth of expertise in the areas of x-ray spectroscopy and scattering techniques and solid state physics.
Marc Michel
(PI) Marc is a post-doctoral research associated on the SLAC SFA project. He earned his Ph.D. in Geosciences from Stony Brook University in 2008, where his dissertation project focused on the structural chemistry of a variety of nanocrystalline and disordered compounds, including the important and ubiquitous nano-material ferrihydrite. Marc's research interests include: the fate of heavy metals in contaminated soils and sediments, and the structures of poorly-ordered environmental nanomaterials, and he brings great depth of expertise in total scattering techniques.
Joanne Stubbs
(PI) Joanne is a post-doctoral research associate on the SLAC SFA project. She earned her Ph.D. in Earth and Planetary Sciences from Johns Hopkins University in 2009, where her dissertation project focused on the environmental mineralogy and geochemistry of uranium-contaminated soils from the Hanford and Oak Ridge sites and on the crystal chemistry of uranium phosphates. Joanne's research interests include: the fate of heavy metals in contaminated soils and sediments, mineralogy, biogeochemistry and crystal chemistry of heavy metals, and she brings great depth of expertise in electron microscopy and x-ray powder diffraction.
Collaborators
- Hakim Boukalfa (LANL): expertise in the biogeochemistry of Pu, with emphasis on the roles of siderophores and other complexing ligands.
- David Clark (LANL): expertise in the chemistry of transuranium actinides with emphasis on the structures and properties of actinide oxides.
- Jim Davis (USGS): expertise in reactive transport modeling of inorganic ions in the subsurface with emphasis on surface complexation modeling.
- Peter Eng (U. Chicago): expertise in the surface scattering measurements with emphasis on CTR studies of oxide-water interfaces.
- Chris Fuller (USGS): expertise in field geochemistry with emphasis in reactive transport and the geochemistry of metal sorption.
- A. Mehta (SSRL): expertise in SR-XS analysis of complex materials, with emphasis on Rietveld techniques.
- Peter Nico (LBL): expertise in soils chemistry and fate/transport of contaminants in natural waters.
- Paul Reimus (LANL): expertise in reactive transport of actinides in soils and sediments, with emphasis on U and Np.
- Dawn Wellman (PNNL): expertise in geochemistry of contaminants in the subsurface with emphasis on polyphosphate amendment for immobilization of U.
- Lynne Soderholm (ANL): expertise in the actinide chemistry and high-energy x-ray scattering.
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