Reactivity of iron-rich phyllosilicates with uranium and chromium through redox transition zones

Technical Report · Thu Sep 01 00:00:00 EDT 2016

DOI:https://doi.org/10.2172/1328434· OSTI ID:1328434

Burgos, William D. ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)

This project performed thermodynamic, kinetic, and mineral structural studies on the reactivity of phyllosilicate Fe(II/III) with metal-reducing bacteria, and with two important poly-valent DOE contaminants (chromium and uranium) that show high mobility in their oxidized state. We focused on Fe-bearing phyllosilicates because these are important components of the reactive, fines fraction of Hanford, Oak Ridge, and Idaho National Laboratory sediments. Iron-bearing phyllosilicates strongly influence the redox state and mobility of Cr and U because of their limited hydraulic conductivity, high specific surface area, and redox reactivity. This was a collaborative project between Penn State (W.D. Burgos – PI), Miami University (H. Dong – Co-PI), and Argonne National Laboratory (K. Kemner and M. Boyanov – Co-PIs). Penn State and Miami University were funded together but separately from ANL. This report summarizes research findings and publications produced by Penn State and Miami University.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States)
• Sponsoring Organization: USDOE Office of Science and Technology (ST)
• DOE Contract Number: SC0005333
• OSTI ID: 1328434
• Report Number(s): DE-SC0005333; TRN: US1700351
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
CHROMIUM
IRON
URANIUM
OAK RIDGE RESERVATION
HANFORD RESERVATION
IDAHO NATIONAL LABORATORY
ACTIVATION ENERGY
BACTERIA
ENVIRONMENTAL TRANSPORT
VALENCE
SILICATE MINERALS
IRON SILICATES
SEDIMENTS