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Coupling of Fe and Tc Speciation in Subsurface Sediments: Implications to Long-Term Tc Immobilization (Zachara NABIR-Fe/Tc, PNNL Scope # 40761)


EMSL Project ID
4594

Abstract

Creating an in-situ bio-barrier containing sediment-bound, biogenic FE(II) to reduce and collect mobile Tc(VII)O4 - The research objective is to provide scientific insights on the rates of reductive immobilization and the long-term stability of the immobilized Tc pool.

Project Details

Project type
Exploratory Research
Start Date
2003-08-15
End Date
2007-06-03
Status
Closed

Team

Principal Investigator

John Zachara
Institution
Pacific Northwest National Laboratory

Team Members

Brian Lower
Institution
The Ohio State University

Zheming Wang
Institution
Pacific Northwest National Laboratory

Alice Dohnalkova
Institution
Environmental Molecular Sciences Laboratory

Ravi Kukkadapu
Institution
Environmental Molecular Sciences Laboratory

Jean-Francois Boily
Institution
Umea University

Related Publications

Fredrickson JK, JM Zachara, AE Plymale, SM Heald, JP McKinley, DW Kennedy, C Liu, and P Nachimuthu. 2009. "Oxidative Dissolution Potential of Biogenic and Abiogenic TcO2 in Subsurface Sediments." Geochimica et Cosmochimica Acta 73(8):962-976. doi:10.1016/j.gca.2009.01.027
Kukkadapu RK, JM Zachara, JK Fredrickson, JP McKinley, DW Kennedy, SC Smith, and H Dong. 2006. "Reductive Biotransformation of Fe in Shale-Limestone Saprolite Containing Fe(III) Oxides and Fe(II)/Fe(III) Phyllosilicates." Geochimica et Cosmochimica Acta 70(14):3662?3676.
Peretyazhko T, JM Zachara, SM Heald, RK Kukkadapu, C Liu, AE Plymale, and CT Resch. 2008. "Reduction of Tc(VII) by Fe(II) Sorbed on Al (hydr)oxides." Environmental Science & Technology 42(15):5499-5506. doi:10.1021/es8003156