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Multicomponent reactive transport modeling of uranium bioremediation field experiments

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Title: Multicomponent reactive transport modeling of uranium bioremediation field experiments
Authors: Fang, Yilin1 yilin.fang@pnl.gov, Yabusaki, Steven B.1, Morrison, Stan J.2, Amonette, James P.1, Long, Philip E.1
Source: Geochimica et Cosmochimica Acta. Oct2009, Vol. 73 Issue 20, p6029-6051. 23p.
Subjects: Multiphase flow, Migration of uranium, Bioremediation, Field research, Chemical models, Data analysis, Phyllosilicates
Geographic Terms: Rifle (Colo.), Colorado
Abstract: Abstract: A reaction network integrating abiotic and microbially mediated reactions has been developed to simulate biostimulation field experiments at a former Uranium Mill Tailings Remedial Action (UMTRA) site in Rifle, Colorado. The reaction network was calibrated using data from the 2002 field experiment, after which it was applied without additional calibration to field experiments performed in 2003 and 2007. The robustness of the model specification is significant in that (1) the 2003 biostimulation field experiment was performed with 3 times higher acetate concentrations than the previous biostimulation in the same field plot (i.e., the 2002 experiment), and (2) the 2007 field experiment was performed in a new unperturbed plot on the same site. The biogeochemical reactive transport simulations accounted for four terminal electron-accepting processes (TEAPs), two distinct functional microbial populations, two pools of bioavailable Fe(III) minerals (iron oxides and phyllosilicate iron), uranium aqueous and surface complexation, mineral precipitation and dissolution. The conceptual model for bioavailable iron reflects recent laboratory studies with sediments from the UMTRA site that demonstrated that the bulk (∼90%) of initial Fe(III) bioreduction is associated with phyllosilicate rather than oxide forms of iron. The uranium reaction network includes a U(VI) surface complexation model based on laboratory studies with Rifle site sediments and aqueous complexation reactions that include ternary complexes (e.g., calcium–uranyl–carbonate). The bioreduced U(IV), Fe(II), and sulfide components produced during the experiments are strongly associated with the solid phases and may play an important role in long-term uranium immobilization. [Copyright &y& Elsevier]
Copyright of Geochimica et Cosmochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 44178347
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Multicomponent reactive transport modeling of uranium bioremediation field experiments
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  Data: <searchLink fieldCode="AR" term="%22Fang%2C+Yilin%22">Fang, Yilin</searchLink><relatesTo>1</relatesTo><i> yilin.fang@pnl.gov</i><br /><searchLink fieldCode="AR" term="%22Yabusaki%2C+Steven+B%2E%22">Yabusaki, Steven B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Morrison%2C+Stan+J%2E%22">Morrison, Stan J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Amonette%2C+James+P%2E%22">Amonette, James P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Long%2C+Philip+E%2E%22">Long, Philip E.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Geochimica+et+Cosmochimica+Acta%22">Geochimica et Cosmochimica Acta</searchLink>. Oct2009, Vol. 73 Issue 20, p6029-6051. 23p.
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  Data: <searchLink fieldCode="DE" term="%22Multiphase+flow%22">Multiphase flow</searchLink><br /><searchLink fieldCode="DE" term="%22Migration+of+uranium%22">Migration of uranium</searchLink><br /><searchLink fieldCode="DE" term="%22Bioremediation%22">Bioremediation</searchLink><br /><searchLink fieldCode="DE" term="%22Field+research%22">Field research</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+models%22">Chemical models</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Phyllosilicates%22">Phyllosilicates</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Rifle+%28Colo%2E%29%22">Rifle (Colo.)</searchLink><br /><searchLink fieldCode="DE" term="%22Colorado%22">Colorado</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: A reaction network integrating abiotic and microbially mediated reactions has been developed to simulate biostimulation field experiments at a former Uranium Mill Tailings Remedial Action (UMTRA) site in Rifle, Colorado. The reaction network was calibrated using data from the 2002 field experiment, after which it was applied without additional calibration to field experiments performed in 2003 and 2007. The robustness of the model specification is significant in that (1) the 2003 biostimulation field experiment was performed with 3 times higher acetate concentrations than the previous biostimulation in the same field plot (i.e., the 2002 experiment), and (2) the 2007 field experiment was performed in a new unperturbed plot on the same site. The biogeochemical reactive transport simulations accounted for four terminal electron-accepting processes (TEAPs), two distinct functional microbial populations, two pools of bioavailable Fe(III) minerals (iron oxides and phyllosilicate iron), uranium aqueous and surface complexation, mineral precipitation and dissolution. The conceptual model for bioavailable iron reflects recent laboratory studies with sediments from the UMTRA site that demonstrated that the bulk (∼90%) of initial Fe(III) bioreduction is associated with phyllosilicate rather than oxide forms of iron. The uranium reaction network includes a U(VI) surface complexation model based on laboratory studies with Rifle site sediments and aqueous complexation reactions that include ternary complexes (e.g., calcium–uranyl–carbonate). The bioreduced U(IV), Fe(II), and sulfide components produced during the experiments are strongly associated with the solid phases and may play an important role in long-term uranium immobilization. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Geochimica et Cosmochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.gca.2009.07.019
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 23
        StartPage: 6029
    Subjects:
      – SubjectFull: Multiphase flow
        Type: general
      – SubjectFull: Migration of uranium
        Type: general
      – SubjectFull: Bioremediation
        Type: general
      – SubjectFull: Field research
        Type: general
      – SubjectFull: Chemical models
        Type: general
      – SubjectFull: Data analysis
        Type: general
      – SubjectFull: Phyllosilicates
        Type: general
      – SubjectFull: Rifle (Colo.)
        Type: general
      – SubjectFull: Colorado
        Type: general
    Titles:
      – TitleFull: Multicomponent reactive transport modeling of uranium bioremediation field experiments
        Type: main
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            NameFull: Fang, Yilin
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            NameFull: Yabusaki, Steven B.
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            NameFull: Morrison, Stan J.
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            NameFull: Amonette, James P.
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            NameFull: Long, Philip E.
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            – D: 15
              M: 10
              Text: Oct2009
              Type: published
              Y: 2009
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              Value: 00167037
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              Value: 73
            – Type: issue
              Value: 20
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            – TitleFull: Geochimica et Cosmochimica Acta
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