Radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide
Abstract
Uptake of six particle-reactive and/or redox-sensitive radionuclides (210Pb, 234Th, 7Be, 59Fe, 237Np and 233Pa) by 14 humic acids (HAs) was investigated in artificial groundwater under mildly acidic conditions (pH~5.5). In HA-groundwater slurry, Pb, Be, Fe and Pa bound strongly to particulate HA (>0.45 μm), supporting their application as tracers of soil erosion. Th bound strongly to the colloidal HA (3 kDa- 0.45 μm) and as such, would not be a good candidate as a tracer for monitoring soil erosion. HAs likely reduced the oxidized neptunyl form (Np(V)O4+) to Np(IV) based on its enhanced particle-reactivity and Np uptake by particulate HAs, partially retarding the movement of anthropogenic 237Np in field polluted environments. Particulate/colloidal carbonyl/O-aryl (likely through hydroquinone/quinone) functionalities in the HA correlated to Np and Pa uptake, but only particulate O-aryl functionalities was responsible for Fe uptake. The carboxylate- and carbonyl/O-aryl-containing organic functionalities in the HA correlated strongly with Th uptake. In contrast, no significant correlations between organic parameters and Pb or Be uptake implied their predominance of uniform surface adsorption onto particles. Our work provides novel insight into the binding of six radionuclides with different organic functionalities of three size fractions, as well as its possible impact on their applicationmore »
- Authors:
-
- Texas A&M Univ., Galveston, TX (United States)
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
- Kobe Univ. (Japan)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Texas A&M Univ., Galveston, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1547374
- Grant/Contract Number:
- SC0014152; AC09-08SR22470
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Lin, Peng, Xu, Chen, Xing, Wei, Sun, Luni, Kaplan, Daniel I., Fujitake, Nobuhide, Yeager, Chris M., Schwehr, Kathleen A., and Santschi, Peter H. Radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide. United States: N. p., 2018.
Web. doi:10.1038/s41598-018-23270-0.
Lin, Peng, Xu, Chen, Xing, Wei, Sun, Luni, Kaplan, Daniel I., Fujitake, Nobuhide, Yeager, Chris M., Schwehr, Kathleen A., & Santschi, Peter H. Radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide. United States. https://doi.org/10.1038/s41598-018-23270-0
Lin, Peng, Xu, Chen, Xing, Wei, Sun, Luni, Kaplan, Daniel I., Fujitake, Nobuhide, Yeager, Chris M., Schwehr, Kathleen A., and Santschi, Peter H. Mon .
"Radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide". United States. https://doi.org/10.1038/s41598-018-23270-0. https://www.osti.gov/servlets/purl/1547374.
@article{osti_1547374,
title = {Radionuclide uptake by colloidal and particulate humic acids obtained from 14 soils collected worldwide},
author = {Lin, Peng and Xu, Chen and Xing, Wei and Sun, Luni and Kaplan, Daniel I. and Fujitake, Nobuhide and Yeager, Chris M. and Schwehr, Kathleen A. and Santschi, Peter H.},
abstractNote = {Uptake of six particle-reactive and/or redox-sensitive radionuclides (210Pb, 234Th, 7Be, 59Fe, 237Np and 233Pa) by 14 humic acids (HAs) was investigated in artificial groundwater under mildly acidic conditions (pH~5.5). In HA-groundwater slurry, Pb, Be, Fe and Pa bound strongly to particulate HA (>0.45 μm), supporting their application as tracers of soil erosion. Th bound strongly to the colloidal HA (3 kDa- 0.45 μm) and as such, would not be a good candidate as a tracer for monitoring soil erosion. HAs likely reduced the oxidized neptunyl form (Np(V)O4+) to Np(IV) based on its enhanced particle-reactivity and Np uptake by particulate HAs, partially retarding the movement of anthropogenic 237Np in field polluted environments. Particulate/colloidal carbonyl/O-aryl (likely through hydroquinone/quinone) functionalities in the HA correlated to Np and Pa uptake, but only particulate O-aryl functionalities was responsible for Fe uptake. The carboxylate- and carbonyl/O-aryl-containing organic functionalities in the HA correlated strongly with Th uptake. In contrast, no significant correlations between organic parameters and Pb or Be uptake implied their predominance of uniform surface adsorption onto particles. Our work provides novel insight into the binding of six radionuclides with different organic functionalities of three size fractions, as well as its possible impact on their application in the soiltracing research.},
doi = {10.1038/s41598-018-23270-0},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {Mon Mar 19 00:00:00 EDT 2018},
month = {Mon Mar 19 00:00:00 EDT 2018}
}
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