Nanotechnology Project

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Environment, Health and Safety Research

NER: Nanoscale Size Effects on the Biogeochemical Reactivity of Iron Oxides in Active Environmental Nanosystems

Project Information

Principal InvestigatorDaniel Giammar
InstitutionWashington University
Project URLView
Relevance to ImplicationsSome
Class of NanomaterialEngineered Nanomaterials
Impact SectorEnvironment
Broad Research Categories Characterization
NNI identifierc3-1

Funding Information

Anticipated Total Funding$114,998.00
Annual Funding$114,998.00
Funding SourceNSF
Funding Mechanism
Funding Sector
Start Year2006
Anticipated End Year2007


This project will study the size-dependence of on critical biogeochemical processes in active environmental nanosystems. Active nanosystems comprised of iron oxide nanoparticles and iron-reducing microorganisms influence natural biogeochemical cycles and can provide the basis for improved environmental remediation technologies. It will include a quantitative kinetic analysis and modeling of surface coordination of adsorbed species. The project will focus on fundamental aspects of nanoparticle reactivity research will be conducted on three related topics: (1) adsorption of U(VI) and Fe(II) onto nano-hematite, (2) rates of U(VI) reduction by surface-bonded Fe(II), and (3) rates of biological and chemical reduction of hematite. The proposed research will contribute to a variety of fields, including chemistry, geochemistry, and material science. The PIs have conducted some preliminary experiments that indicate a high likelihood that the project will be successful. The three PIs have complementary areas of expertise and are well qualified in the area of surface chemistry. The project has a strong educational and outreach component, including participation of undergraduates through an existing REU program and outreach to high schools through the NSF-STARS program.