Colloidal Size and Redox State of Uranium Species in the Porewater of a Pristine Mountain Wetland

Colloidal Size and Redox State of Uranium Species in the Porewater of a Pristine Mountain Wetland

Uranium (U) speciation was investigated in anoxically preserved porewater samples of a natural mountain wetland in Gola di Lago, Ticino, Switzerland. U porewater concentrations ranged from less than 1 μg/L to tens of μg/L, challenging the available analytical approaches for U speciation in natural s...

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Veröffentlicht in:Environmental science & technology 2019-08, Vol.53 (16), p.9361-9369
Hauptverfasser: Dublet, Gabrielle, Worms, Isabelle, Frutschi, Manon, Brown, Ashley, Zünd, Giada C, Bartova, Barbora, Slaveykova, Vera I, Bernier-Latmani, Rizlan
Format: Artikel
Sprache:eng
Schlagworte:
Anion exchange
Anion exchanging
Colloids
Fractionation
Inductively coupled plasma mass spectrometry
Iron
Mass spectrometry
Mass spectroscopy
Mountains
Nanoparticles
Organic compounds
Organic matter
Pore water
Redox properties
Resins
Size distribution
Speciation
Species
Uranium
Wetlands
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Zusammenfassung:Uranium (U) speciation was investigated in anoxically preserved porewater samples of a natural mountain wetland in Gola di Lago, Ticino, Switzerland. U porewater concentrations ranged from less than 1 μg/L to tens of μg/L, challenging the available analytical approaches for U speciation in natural samples. Asymmetrical flow field-flow fractionation coupled with inductively coupled plasma mass spectrometry allowed the characterization of colloid populations and the determination of the size distribution of U species in the porewater. Most of the U was associated with three fractions:
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.9b01417