Method to Attenuate U(VI) Mobility in Acidic Waste Plumes Using Humic Acids.
Saved in:
| Title: | Method to Attenuate U(VI) Mobility in Acidic Waste Plumes Using Humic Acids. |
|---|---|
| Authors: | Jiamin Wan1 jwan@lbl.gov, Wenming Dong1, Tokunaga, Tetsu K.1 |
| Source: | Environmental Science & Technology. 3/15/2011, Vol. 45 Issue 6, p2331-2337. 7p. |
| Subject Terms: | *In situ remediation, *Groundwater remediation, *Humic acid, *Uranium mining & the environment, *Groundwater pollution, *Uranium & the environment, *Plutonium & the environment, *Biodegradation, Migration of uranium |
| Abstract: | Acidic uranium (U) groundwater plumes have resulted from acid-extraction of plutonium during the Cold War and from U mining and milling operations. A sustainable method for in situ immobilization of U under acidic conditions is not yet available. Here, we propose to use humic acids (HAs) for in situ U immobilization in acidic waste plumes. Our laboratory batch experiments show that HA can adsorb onto aquifer sediments rapidly, strongly and practically irreversibly. Adding HA greatly enhanced U adsorption capacity to sediments at pH below 5.0. Our column experiments using historically contaminated sediments from the Savannah River Site under slow flow rates (120 and 12 m/year) show that desorption of U and HA were nondetectable over 100 pore-volumes of leaching with simulated acidic groundwaters. Upon HA-treatment, 99% of the contaminant [U] was immobilized at pH ≤ 4.5, compared to 5% and 5896 immobilized ih the control columns at pH 3.5 and 4.5, respectively. These results indicate that HA-treatment is a promising in situ remediation method for acidic U waste plumes. As a remediation reagent, HAs are resistant to biodegradation, cost-effective, nontoxic, and easily intraducible to the subsurface. [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 |
|---|---|
| Header | DbId: 8gh DbLabel: GreenFILE An: 59694233 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Method to Attenuate U(VI) Mobility in Acidic Waste Plumes Using Humic Acids. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Jiamin+Wan%22">Jiamin Wan</searchLink><relatesTo>1</relatesTo><i> jwan@lbl.gov</i><br /><searchLink fieldCode="AR" term="%22Wenming+Dong%22">Wenming Dong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tokunaga%2C+Tetsu+K%2E%22">Tokunaga, Tetsu K.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Technology%22">Environmental Science & Technology</searchLink>. 3/15/2011, Vol. 45 Issue 6, p2331-2337. 7p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22In+situ+remediation%22">In situ remediation</searchLink><br />*<searchLink fieldCode="DE" term="%22Groundwater+remediation%22">Groundwater remediation</searchLink><br />*<searchLink fieldCode="DE" term="%22Humic+acid%22">Humic acid</searchLink><br />*<searchLink fieldCode="DE" term="%22Uranium+mining+%26+the+environment%22">Uranium mining & the environment</searchLink><br />*<searchLink fieldCode="DE" term="%22Groundwater+pollution%22">Groundwater pollution</searchLink><br />*<searchLink fieldCode="DE" term="%22Uranium+%26+the+environment%22">Uranium & the environment</searchLink><br />*<searchLink fieldCode="DE" term="%22Plutonium+%26+the+environment%22">Plutonium & the environment</searchLink><br />*<searchLink fieldCode="DE" term="%22Biodegradation%22">Biodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Migration+of+uranium%22">Migration of uranium</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Acidic uranium (U) groundwater plumes have resulted from acid-extraction of plutonium during the Cold War and from U mining and milling operations. A sustainable method for in situ immobilization of U under acidic conditions is not yet available. Here, we propose to use humic acids (HAs) for in situ U immobilization in acidic waste plumes. Our laboratory batch experiments show that HA can adsorb onto aquifer sediments rapidly, strongly and practically irreversibly. Adding HA greatly enhanced U adsorption capacity to sediments at pH below 5.0. Our column experiments using historically contaminated sediments from the Savannah River Site under slow flow rates (120 and 12 m/year) show that desorption of U and HA were nondetectable over 100 pore-volumes of leaching with simulated acidic groundwaters. Upon HA-treatment, 99% of the contaminant [U] was immobilized at pH ≤ 4.5, compared to 5% and 5896 immobilized ih the control columns at pH 3.5 and 4.5, respectively. These results indicate that HA-treatment is a promising in situ remediation method for acidic U waste plumes. As a remediation reagent, HAs are resistant to biodegradation, cost-effective, nontoxic, and easily intraducible to the subsurface. [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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=8gh&AN=59694233 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1021/es103864t Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 2331 Subjects: – SubjectFull: In situ remediation Type: general – SubjectFull: Groundwater remediation Type: general – SubjectFull: Humic acid Type: general – SubjectFull: Uranium mining & the environment Type: general – SubjectFull: Groundwater pollution Type: general – SubjectFull: Uranium & the environment Type: general – SubjectFull: Plutonium & the environment Type: general – SubjectFull: Biodegradation Type: general – SubjectFull: Migration of uranium Type: general Titles: – TitleFull: Method to Attenuate U(VI) Mobility in Acidic Waste Plumes Using Humic Acids. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Jiamin Wan – PersonEntity: Name: NameFull: Wenming Dong – PersonEntity: Name: NameFull: Tokunaga, Tetsu K. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 03 Text: 3/15/2011 Type: published Y: 2011 Identifiers: – Type: issn-print Value: 0013936X Numbering: – Type: volume Value: 45 – Type: issue Value: 6 Titles: – TitleFull: Environmental Science & Technology Type: main |
| ResultId | 1 |
