Recent advances in the detection of specific natural organic compounds as carriers for radionuclides in soil and water environments, with examples of radioiodine and plutonium

Santschi, P. H.; Xu, C.; Zhang, S.; Schwehr, K. A.; Lin, P.; Yeager, C. M.; Kaplan, D. I.

doi:10.1016/j.jenvrad.2017.02.023

Recent advances in the detection of specific natural organic compounds as carriers for radionuclides in soil and water environments, with examples of radioiodine and plutonium

Journal Article · Thu Mar 09 00:00:00 EST 2017 · Journal of Environmental Radioactivity

DOI:https://doi.org/10.1016/j.jenvrad.2017.02.023· OSTI ID:1369198

^[1]; Xu, C. ^[1]; Zhang, S. ^[1]; Schwehr, K. A. ^[1]; Lin, P. ^[1]; Yeager, C. M. ^[2]; Kaplan, D. I. ^[3]

Texas A & M Univ., Galveston, TX (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

Among the key environmental factors influencing the fate and transport of radionuclides in the environment is natural organic matter (NOM). While this has been known for decades, there still remains great uncertainty in predicting NOM-radionuclide interactions because of lack of understanding of radionuclide interactions with the specific organic moieties within NOM. Furthermore, radionuclide-NOM studies conducted using modelled organic compounds or elevated radionuclide concentrations provide compromised information related to true environmental conditions. Thus, sensitive techniques are required not only for the detection of radionuclides, and their different species, at ambient and/or far-field concentrations, but also for potential trace organic compounds that are chemically binding these radionuclides. GC-MS and AMS techniques developed in our lab are reviewed in this paper that aim to assess how two radionuclides, iodine and plutonium, form strong bonds with NOM by entirely different mechanisms; iodine tends to bind to aromatic functionalities, whereas plutonium binds to N-containing hydroxamate siderophores at ambient concentrations. While low-level measurements are a prerequisite for assessing iodine and plutonium migration at nuclear waste sites and as environmental tracers, it is necessary to determine their in-situ speciation, which ultimately controls their mobility and transport in natural environments. Finally and more importantly, advanced molecular-level instrumentation (e.g., nuclear magnetic resonance (NMR) and Fourier-transform ion cyclotron resonance coupled with electrospray ionization (ESI-FTICRMS) were applied to resolve either directly or indirectly the molecular environments in which the radionuclides are associated with the NOM.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Savannah River Site (SRS), Aiken, SC (United States); Texas A & M Univ., Galveston, TX (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)

Grant/Contract Number:: AC09-08SR22470; AC52-06NA25396; SC0014152

OSTI ID:: 1369198

Alternate ID(s):: OSTI ID: 1414317
OSTI ID: 22706301

Report Number(s):: LA-UR--17-21389

Journal Information:: Journal of Environmental Radioactivity, Journal Name: Journal of Environmental Radioactivity Vol. 171; ISSN 0265-931X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Recent advances in the detection of specific natural organic compounds as carriers for radionuclides in soil and water environments, with examples of radioiodine and plutonium

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References (41)

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