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Effect of biodegradable amendments on uranium solubility in contaminated soils

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Title: Effect of biodegradable amendments on uranium solubility in contaminated soils
Authors: Duquène, L.1 lduquene@sckcen.be, Tack, F.2, Meers, E.2, Baeten, J.3, Wannijn, J.1, Vandenhove, H.1
Source: Science of the Total Environment. Feb2008, Vol. 391 Issue 1, p26-33. 8p.
Subjects: Phytoremediation, Migration of uranium, Soil amendments, Citric acid, Ammonium compounds, Oxalic acid, Ethylenediamine, Succinic acid, Nitrilotriacetic acid, Chelates, Solubility
Abstract: Chelate-assisted phytoextraction has been proposed as a potential tool for phytoremediation of U contaminated sites. In this context, the effects of five biodegradable amendments on U release in contaminated soils were evaluated. Three soils were involved in this study, one with a relatively high background level of U, and two which were contaminated with U from industrial effluents. Soils were treated with 5 mmol kg−1 dry weight of either citric acid, NH4-citrate/citric acid, oxalic acid, S,S-ethylenediamine disuccinic acid or nitrilotriacetic acid. Soil solution concentration of U was monitored during 2 weeks. All amendments increased U concentration in soil solution, but citric acid and NH4-citrate/citric acid mixture were most effective, with up to 479-fold increase. For oxalic acid, S,S-ethylenediamine disuccinic acid and nitrilotriacetic acid, the increase ranged from 10-to 100-fold. The highest concentrations were observed 1 to 7 days after treatment, after which U levels in soil solution gradually decreased. All amendments induced a temporary increase of soil solution pH and TOC that could not be correlated with the release of U in the soil solution. Thermodynamic stability constants (log K) of complexes did not predict the relative efficiency of the selected biodegradable amendments on U release in soil solution. Amendments efficiency was better predicted by the relative affinity of the chelate for Fe compared to U. [Copyright &y& Elsevier]
Copyright of Science of the Total Environment is the property of Elsevier B.V. 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: 28071710
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effect of biodegradable amendments on uranium solubility in contaminated soils
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  Data: <searchLink fieldCode="JN" term="%22Science+of+the+Total+Environment%22">Science of the Total Environment</searchLink>. Feb2008, Vol. 391 Issue 1, p26-33. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Phytoremediation%22">Phytoremediation</searchLink><br /><searchLink fieldCode="DE" term="%22Migration+of+uranium%22">Migration of uranium</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+amendments%22">Soil amendments</searchLink><br /><searchLink fieldCode="DE" term="%22Citric+acid%22">Citric acid</searchLink><br /><searchLink fieldCode="DE" term="%22Ammonium+compounds%22">Ammonium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Oxalic+acid%22">Oxalic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Ethylenediamine%22">Ethylenediamine</searchLink><br /><searchLink fieldCode="DE" term="%22Succinic+acid%22">Succinic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrilotriacetic+acid%22">Nitrilotriacetic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Chelates%22">Chelates</searchLink><br /><searchLink fieldCode="DE" term="%22Solubility%22">Solubility</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Chelate-assisted phytoextraction has been proposed as a potential tool for phytoremediation of U contaminated sites. In this context, the effects of five biodegradable amendments on U release in contaminated soils were evaluated. Three soils were involved in this study, one with a relatively high background level of U, and two which were contaminated with U from industrial effluents. Soils were treated with 5 mmol kg−1 dry weight of either citric acid, NH4-citrate/citric acid, oxalic acid, S,S-ethylenediamine disuccinic acid or nitrilotriacetic acid. Soil solution concentration of U was monitored during 2 weeks. All amendments increased U concentration in soil solution, but citric acid and NH4-citrate/citric acid mixture were most effective, with up to 479-fold increase. For oxalic acid, S,S-ethylenediamine disuccinic acid and nitrilotriacetic acid, the increase ranged from 10-to 100-fold. The highest concentrations were observed 1 to 7 days after treatment, after which U levels in soil solution gradually decreased. All amendments induced a temporary increase of soil solution pH and TOC that could not be correlated with the release of U in the soil solution. Thermodynamic stability constants (log K) of complexes did not predict the relative efficiency of the selected biodegradable amendments on U release in soil solution. Amendments efficiency was better predicted by the relative affinity of the chelate for Fe compared to U. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Science of the Total Environment is the property of Elsevier B.V. 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:
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      – Type: doi
        Value: 10.1016/j.scitotenv.2007.10.042
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 26
    Subjects:
      – SubjectFull: Phytoremediation
        Type: general
      – SubjectFull: Migration of uranium
        Type: general
      – SubjectFull: Soil amendments
        Type: general
      – SubjectFull: Citric acid
        Type: general
      – SubjectFull: Ammonium compounds
        Type: general
      – SubjectFull: Oxalic acid
        Type: general
      – SubjectFull: Ethylenediamine
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      – SubjectFull: Succinic acid
        Type: general
      – SubjectFull: Nitrilotriacetic acid
        Type: general
      – SubjectFull: Chelates
        Type: general
      – SubjectFull: Solubility
        Type: general
    Titles:
      – TitleFull: Effect of biodegradable amendments on uranium solubility in contaminated soils
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              M: 02
              Text: Feb2008
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              Y: 2008
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