Final Report DE-FG02-04ER63719 Metadata

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Title

  • Main Title Final Report DE-FG02-04ER63719

Creator

  • Author: Lovley, Derek, R.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Office of Science.
    Contributor Type: Organization
    Contributor Info: USDOE - Office of Science (SC)

Publisher

  • Name: University of Massachusetts Amherst
    Place of Publication: Amhearst, Massachusetts

Date

  • Creation: 2008-03-12

Language

  • English

Description

  • Content Description: The studies completed under this grant significantly advanced the understanding and design of strategies for in situ uranium bioremediation. Novel strategies identified show promise to make in situ uranium bioremediation technically simpler and less expensive. As detailed, important findings included: (1) Development of an electron donor delivery strategy to prolong the in situ activity of Geobacter species and enhance the removal of uranium from the groundwater; (2) Demonstration that reproducible year-to-year field experiments were possible at the ERSP study site in Rifle, CO, making hypothesis-driven field experimentation possible; (3) Elucidation of the geochemical and microbiological heterogeneities with the subsurface during in situ uranium bioremediation, which must be accounted for to accurately model the bioremediation process; (4) The discovery that most of the U(VI) contamination at the Rifle site is sediment-associated rather than mobile in the groundwater, as previously considered; (5) The finding that unlike soluble U(VI), sediment-associated U(VI) is not microbially reducible; (6) The demonstration that electrodes may be an effective alternative to acetate as an electron donor to promote microbial U(VI) reduction in the subsurface with the added benefit that electrode-promoted microbial U(VI) reduction offers the possibility of removing the immobilized uranium from the subsurface; and (7) The finding that, after extended acetate inputs, U(VI) continues to be removed from groundwater long after the introduction of acetate into the subsurface is terminated and that this appears to be due to adsorption onto biomass. This potentially will make in situ uranium bioremediation much less expensive than previously envisioned.
  • Physical Description: 180 Megabytes

Subject

  • Keyword: Removal
  • Keyword: Acetates
  • Keyword: Biomass
  • Keyword: Uranium
  • Keyword: Valence Geobacter
  • Keyword: Electrodes
  • Keyword: Bioremediation
  • Keyword: Design
  • Keyword: Adsorption
  • Keyword: Contamination
  • STI Subject Categories: 54 Environmental Sciences
  • Keyword: Electrons
  • Keyword: Subsurface Microbiology
  • Keyword: Geobacter
  • Keyword: Binding Energy
  • Keyword: Aquifers

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Report No.: DOE/FE/63719-Final Report
  • Grant Number: FG02-04ER63719
  • DOI: 10.2172/924890
  • Office of Scientific & Technical Information Report Number: 924890
  • Archival Resource Key: ark:/67531/metadc898395