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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Bibliographic Details
Published in:Environmental science & technology 2017-10, Vol.51 (20), p.11742-11751
Main Authors: Lin, Peng, Xu, Chen, Zhang, Saijin, Fujitake, Nobuhide, Kaplan, Daniel I, Yeager, Chris M, Sugiyama, Yuko, Schwehr, Kathleen A, Santschi, Peter H
Format: Article
Language:English
Subjects:
Acidic soils
Airborne particulates
Binding
Colloids
Correlation analysis
Flooding
Groundwater
Humic acids
Humic Substances
Nitrogen
NMR
Nuclear magnetic resonance
Organic Chemicals
Organic compounds
Organic matter
Organic nitrogen
Partitioning
pH effects
Plutonium
Soil
Soil Pollutants, Radioactive
Soil types
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Summary: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