Evidence for Hydroxamate Siderophores and Other N-Containing Organic Compounds Controlling ^sup 239,240^Pu Immobilization and Remobilization in a Wetland Sediment

Evidence for Hydroxamate Siderophores and Other N-Containing Organic Compounds Controlling ^sup 239,240^Pu Immobilization and Remobilization in a Wetland Sediment

Pu concentrations in wetland surface sediments collected downstream of a former nuclear processing facility in F-Area of the Savannah River Site (SRS), USA, were ~2.5 times greater than those measured in the associated upland aquifer sediments; similarly, the Pu concentration solid/water ratios were...

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Veröffentlicht in:Environmental science & technology 2015-10, Vol.49 (19), p.11458
Hauptverfasser: Xu, Chen, Zhang, Saijin, Kaplan, Daniel I, Ho, Yi-Fang, Schwehr, Kathleen A, Roberts, Kimberly A, Chen, Hongmei, DiDonato, Nicole, Athon, Matthew, Hatcher, Patrick G, Santschi, Peter H
Format: Artikel
Sprache:eng
Schlagworte:
Aquifers
Fourier transforms
Ions
Mass spectrometry
Molecular weight
Sediments
Wetlands
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Zusammenfassung:Pu concentrations in wetland surface sediments collected downstream of a former nuclear processing facility in F-Area of the Savannah River Site (SRS), USA, were ~2.5 times greater than those measured in the associated upland aquifer sediments; similarly, the Pu concentration solid/water ratios were orders of magnitude greater in the wetland than in the low-organic matter content aquifer soils. Sediment Pu concentrations were correlated to total organic carbon and total nitrogen contents and even more strongly to hydroxamate siderophore (HS) concentrations. The HS were detected in the particulate or colloidal phases of the sediments but not in the low molecular weight fractions (
ISSN:0013-936X