Stabilization of Plutonium Nano-Colloids by Epitaxial Distortion on Mineral Surfaces.
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| Title: | Stabilization of Plutonium Nano-Colloids by Epitaxial Distortion on Mineral Surfaces. |
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| Authors: | Powell, Brian A.1 bpowell@clemson.edu, Zurong Dai2, Zavarin, Mavrik2, Pihong Zhao2, Kersting, Annie B.2 |
| Source: | Environmental Science & Technology. 4/1/2011, Vol. 45 Issue 7, p2698-2703. 6p. |
| Subject Terms: | *Environmental chemistry, *Plutonium, *Radioactive waste disposal & the environment, Nanofluids, Transmission electron microscopy, Radioactive waste characterization, Diffusion in hydrology |
| Abstract: | The subsurface migration of Pu may be enhanced by the presence of colloidal ferns of Pu. Therefore, complete evaluation of the risk posed by subsurface Pu contamination needs to include a detailed physical/chemical understanding of Pu colloid formation and interactions of Pu colloids with environmentally relevant solid phases. Transmission electron microscopy (TEM) was used to characterize Pu nanucolloids and interactions of Pu nanocolloids with goethite and quartz. We report that intrinsic Pu nanocolloids generated in the absence of goethite or quartz were 2-5 nm in diameter, and both electron diffraction analysis and HRTEM confirm the expected Fm3m space group with the fcc, PuO2 structure. Plutonium nanocolloids formed on goethite have undergone a lattice distortion relative to the ideal fluorite-type structure, fcc, PoO2, resulting in the formation of a bcc, Pu4O7 structure. This structural distortion results from an epitaxial growth of the plutonium colloid on goethite, leading to stronger binding of plutonium to goethite compared with other minerals such as quartz: where the distortion was not observed. This finding provides new insight for understanding how molecular-scale behavior at the mineral-water interface may facilitate transport of plutonium at the field scale. [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: 60712436 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Stabilization of Plutonium Nano-Colloids by Epitaxial Distortion on Mineral Surfaces. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Powell%2C+Brian+A%2E%22">Powell, Brian A.</searchLink><relatesTo>1</relatesTo><i> bpowell@clemson.edu</i><br /><searchLink fieldCode="AR" term="%22Zurong+Dai%22">Zurong Dai</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zavarin%2C+Mavrik%22">Zavarin, Mavrik</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pihong+Zhao%22">Pihong Zhao</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kersting%2C+Annie+B%2E%22">Kersting, Annie B.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Technology%22">Environmental Science & Technology</searchLink>. 4/1/2011, Vol. 45 Issue 7, p2698-2703. 6p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Environmental+chemistry%22">Environmental chemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Plutonium%22">Plutonium</searchLink><br />*<searchLink fieldCode="DE" term="%22Radioactive+waste+disposal+%26+the+environment%22">Radioactive waste disposal & the environment</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofluids%22">Nanofluids</searchLink><br /><searchLink fieldCode="DE" term="%22Transmission+electron+microscopy%22">Transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+waste+characterization%22">Radioactive waste characterization</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+in+hydrology%22">Diffusion in hydrology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The subsurface migration of Pu may be enhanced by the presence of colloidal ferns of Pu. Therefore, complete evaluation of the risk posed by subsurface Pu contamination needs to include a detailed physical/chemical understanding of Pu colloid formation and interactions of Pu colloids with environmentally relevant solid phases. Transmission electron microscopy (TEM) was used to characterize Pu nanucolloids and interactions of Pu nanocolloids with goethite and quartz. We report that intrinsic Pu nanocolloids generated in the absence of goethite or quartz were 2-5 nm in diameter, and both electron diffraction analysis and HRTEM confirm the expected Fm3m space group with the fcc, PuO2 structure. Plutonium nanocolloids formed on goethite have undergone a lattice distortion relative to the ideal fluorite-type structure, fcc, PoO2, resulting in the formation of a bcc, Pu4O7 structure. This structural distortion results from an epitaxial growth of the plutonium colloid on goethite, leading to stronger binding of plutonium to goethite compared with other minerals such as quartz: where the distortion was not observed. This finding provides new insight for understanding how molecular-scale behavior at the mineral-water interface may facilitate transport of plutonium at the field scale. [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/es1033487 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 2698 Subjects: – SubjectFull: Environmental chemistry Type: general – SubjectFull: Plutonium Type: general – SubjectFull: Radioactive waste disposal & the environment Type: general – SubjectFull: Nanofluids Type: general – SubjectFull: Transmission electron microscopy Type: general – SubjectFull: Radioactive waste characterization Type: general – SubjectFull: Diffusion in hydrology Type: general Titles: – TitleFull: Stabilization of Plutonium Nano-Colloids by Epitaxial Distortion on Mineral Surfaces. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Powell, Brian A. – PersonEntity: Name: NameFull: Zurong Dai – PersonEntity: Name: NameFull: Zavarin, Mavrik – PersonEntity: Name: NameFull: Pihong Zhao – PersonEntity: Name: NameFull: Kersting, Annie B. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: 4/1/2011 Type: published Y: 2011 Identifiers: – Type: issn-print Value: 0013936X Numbering: – Type: volume Value: 45 – Type: issue Value: 7 Titles: – TitleFull: Environmental Science & Technology Type: main |
| ResultId | 1 |
