Influence of Dynamical Conditions on the Reduction of UVI at the Magnetite--Solution Interface.
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| Title: | Influence of Dynamical Conditions on the Reduction of UVI at the Magnetite--Solution Interface. |
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| Authors: | ILTON, EUGENE S.1 Eugene.Ilton@PNL.gov, BOILY, JEAN-FRANÇOIS2, BUCK, EDGAR C.1, SKOMURSKI, FRANCES N.1, ROSSO, KEVIN M.1, CAHILL, CHRISTOPHER L.3, BARGAR, JOHN R.4, FELMY, ANDREW R.1 |
| Source: | Environmental Science & Technology. 1/1/2010, Vol. 44 Issue 1, p170-176. 7p. |
| Subject Terms: | *Oxidation-reduction reaction, Chemical reduction, Scientific experimentation, Magnetite, Effect of temperature on chemical kinetics, Migration of uranium |
| Abstract: | The heterogeneous reduction of UVI to UIV by ferrous iron is believed to be a key process influencing the fate and transport of U in the environment. The reactivity of both sorbed and structural FeII has been studied for numerous substrates, including magnetite. Published results from UVI-magnetite experiments have been variable, ranging from no reduction to clear evidence for the formation of UIV. In this contribution, we used XAS and high resolution (±cryogenic) XPS to study the interaction of UVI with nanoparticulate magnetite. The results indicated that UVI was partially reduced to UV with no evidence of UVI. However, thermodynamic calculations indicated that U phases with average oxidation states below (V) should have been stable, indicating that the system was out in redox equilibrium. A reaction pathway that involves incorporation and stabilization of UV and UVI into secondary phases is invoked to explain the observations. The results suggests an important and previously unappreciated role of UV in the fate and transport of uranium in the environment. [ABSTRACT FROM AUTHOR] |
| Copyright of Environmental Science & Technology is the property of American Chemical Society 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: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 48143424 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Influence of Dynamical Conditions on the Reduction of U<superscript>VI</superscript> at the Magnetite--Solution Interface. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22ILTON%2C+EUGENE+S%2E%22">ILTON, EUGENE S.</searchLink><relatesTo>1</relatesTo><i> Eugene.Ilton@PNL.gov</i><br /><searchLink fieldCode="AR" term="%22BOILY%2C+JEAN-FRANÇOIS%22">BOILY, JEAN-FRANÇOIS</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22BUCK%2C+EDGAR+C%2E%22">BUCK, EDGAR C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22SKOMURSKI%2C+FRANCES+N%2E%22">SKOMURSKI, FRANCES N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22ROSSO%2C+KEVIN+M%2E%22">ROSSO, KEVIN M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22CAHILL%2C+CHRISTOPHER+L%2E%22">CAHILL, CHRISTOPHER L.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22BARGAR%2C+JOHN+R%2E%22">BARGAR, JOHN R.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22FELMY%2C+ANDREW+R%2E%22">FELMY, ANDREW R.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Technology%22">Environmental Science & Technology</searchLink>. 1/1/2010, Vol. 44 Issue 1, p170-176. 7p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reduction%22">Chemical reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Scientific+experimentation%22">Scientific experimentation</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetite%22">Magnetite</searchLink><br /><searchLink fieldCode="DE" term="%22Effect+of+temperature+on+chemical+kinetics%22">Effect of temperature on chemical kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Migration+of+uranium%22">Migration of uranium</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The heterogeneous reduction of UVI to UIV by ferrous iron is believed to be a key process influencing the fate and transport of U in the environment. The reactivity of both sorbed and structural FeII has been studied for numerous substrates, including magnetite. Published results from UVI-magnetite experiments have been variable, ranging from no reduction to clear evidence for the formation of UIV. In this contribution, we used XAS and high resolution (±cryogenic) XPS to study the interaction of UVI with nanoparticulate magnetite. The results indicated that UVI was partially reduced to UV with no evidence of UVI. However, thermodynamic calculations indicated that U phases with average oxidation states below (V) should have been stable, indicating that the system was out in redox equilibrium. A reaction pathway that involves incorporation and stabilization of UV and UVI into secondary phases is invoked to explain the observations. The results suggests an important and previously unappreciated role of UV in the fate and transport of uranium in the environment. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Environmental Science & Technology is the property of American Chemical Society 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: 10.1021/es9014597 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 170 Subjects: – SubjectFull: Oxidation-reduction reaction Type: general – SubjectFull: Chemical reduction Type: general – SubjectFull: Scientific experimentation Type: general – SubjectFull: Magnetite Type: general – SubjectFull: Effect of temperature on chemical kinetics Type: general – SubjectFull: Migration of uranium Type: general Titles: – TitleFull: Influence of Dynamical Conditions on the Reduction of UVI at the Magnetite--Solution Interface. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: ILTON, EUGENE S. – PersonEntity: Name: NameFull: BOILY, JEAN-FRANÇOIS – PersonEntity: Name: NameFull: BUCK, EDGAR C. – PersonEntity: Name: NameFull: SKOMURSKI, FRANCES N. – PersonEntity: Name: NameFull: ROSSO, KEVIN M. – PersonEntity: Name: NameFull: CAHILL, CHRISTOPHER L. – PersonEntity: Name: NameFull: BARGAR, JOHN R. – PersonEntity: Name: NameFull: FELMY, ANDREW R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: 1/1/2010 Type: published Y: 2010 Identifiers: – Type: issn-print Value: 0013936X Numbering: – Type: volume Value: 44 – Type: issue Value: 1 Titles: – TitleFull: Environmental Science & Technology Type: main |
| ResultId | 1 |
