Plutonium Partitioning Behavior to Humic Acids from Widely Varying Soils Is Related to Carboxyl-Containing Organic Compounds

In order to examine the influence of the HA molecular composition on the partitioning of Pu, ten different kinds of humic acids (HAs) of contrasting chemical composition, collected and extracted from different soil types around the world were equilibrated with groundwater at low Pu concentrations (1...

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Veröffentlicht in:Environmental science & technology 2017-10, Vol.51 (20), p.11742-11751
Hauptverfasser: Lin, Peng, Xu, Chen, Zhang, Saijin, Fujitake, Nobuhide, Kaplan, Daniel I, Yeager, Chris M, Sugiyama, Yuko, Schwehr, Kathleen A, Santschi, Peter H
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Sprache:eng
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Zusammenfassung:In order to examine the influence of the HA molecular composition on the partitioning of Pu, ten different kinds of humic acids (HAs) of contrasting chemical composition, collected and extracted from different soil types around the world were equilibrated with groundwater at low Pu concentrations (10–14 M). Under mildly acidic conditions (pH ∼ 5.5), 29 ± 24% of the HAs were released as colloidal organic matter (>3 kDa to
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.7b03409