Calcite Precipitation and Trace Metal Partitioning in Groundwater and the Vadose Zone: Remediation of Strontium-90 and Other Divalent Metals and Radionuclides in Arid Western Environments Metadata

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Title

  • Main Title Calcite Precipitation and Trace Metal Partitioning in Groundwater and the Vadose Zone: Remediation of Strontium-90 and Other Divalent Metals and Radionuclides in Arid Western Environments

Creator

  • Author: Smith, Robert W.
    Creator Type: Personal
  • Author: Colwell, F. ''Rick'' S.
    Creator Type: Personal
  • Author: Ingram, Jani C.
    Creator Type: Personal
  • Author: Ferris, F. Grant
    Creator Type: Personal
  • Author: Reysenbach, Anna-Louise
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Office of Environmental Management.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Environmental Management (EM) (United States)

Publisher

  • Name: Idaho National Engineering and Environmental Lab., Idaho Falls, ID
    Place of Publication: United States
  • Name: University of Toronto, Toronto, Ontario
    Place of Publication: United States
  • Name: Portland State University, Portland, OR (United States)
    Place of Publication: United States

Date

  • Creation: 2000-07-19

Language

  • English

Description

  • Content Description: Radionuclide and metal contaminants are present in the vadose zone and groundwater throughout the U.S. Department of Energy (DOE) weapons complex. Demonstrating in situ immobilization of these contaminants in vadose zones or groundwater plumes is a cost-effective remediation strategy. However, the implementation of in situ remediation requires definition of the mechanism that controls sequestration of the contaminants. One such mechanism for metals and radionuclides is co-precipitation of these elements in authigenic calcite and calcite overgrowths. Calcite, a common mineral in many aquifers and vadose zones in the arid western U.S., can incorporate divalent metals such as strontium, cadmium, lead, and cobalt into its crystal structure by the formation of solid solutions. The rate at which trace metals are incorporated into calcite is a function of calcite precipitation kinetics, adsorption interactions between the calcite surface and the trace metal in solution, solid solution properties of the trace metal in calcite, and also the surfaces upon which the calcite is precipitating. A fundamental understanding of the coupling of calcite precipitation and trace metal partitioning and how this may occur in aquifers and vadose environments is lacking. The focus of the research proposed here is to investigate the facilitated partitioning of metal and radionuclides by their coprecipitation with calcium carbonate. Our specific research objectives include: (1) Elucidating the mechanisms and rates of microbially facilitated calcite precipitation and divalent cation adsorption/co-precipitation occurring in a natural aquifer and vadose zone perched water body as a result of the introduction of urea. (2) Assessing the effects of spatial variability in aquifer host rock and the associated hydro/biogeochemical processes on calcite precipitation rates and mineral phases within an aquifer and a vadose zone perched water body.
  • Physical Description: vp.

Subject

  • Keyword: Urea
  • Keyword: Radioisotopes
  • Keyword: Cobalt
  • Keyword: Crystal Structure
  • Keyword: Strontium
  • Keyword: Implementation
  • Keyword: Strontium 90
  • STI Subject Categories: 36 Materials Science
  • Keyword: Kinetics
  • STI Subject Categories: 58 Geosciences
  • Keyword: Calcium Carbonates
  • Keyword: Coprecipitation
  • Keyword: Calcite
  • STI Subject Categories: 54 Environmental Sciences
  • Keyword: Plumes
  • Keyword: Cations
  • Keyword: Precipitation
  • Keyword: Cadmium
  • Keyword: Solid Solutions
  • Keyword: Aquifers

Source

  • Other Information: PBD: 19 Jul 2000

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.: EMSP-70206--2000
  • Grant Number: FG07-99ER15025
  • Grant Number: FG07-99ER15020
  • DOI: 10.2172/833667
  • Office of Scientific & Technical Information Report Number: 833667
  • Archival Resource Key: ark:/67531/metadc780691