Tracking nitrite's deviation from Stokes–Einstein predictions with pulsed field gradient 15N NMR spectroscopy
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Univ. of Utah, Salt Lake City, UT (United States)
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Washington State Univ., Pullman, WA (United States)
Predicting the behavior of oxyanions in radioactive waste stored at the Department of Energy legacy nuclear sites requires the development of novel analytical methods. This work demonstrates 15N pulsed field gradient nuclear magnetic resonance spectroscopy to quantify the diffusivity of nitrite. Experimental results, supported by molecular dynamics simulations, indicate that the diffusivity of free hydrated nitrite exceeds that of free hydrated sodium despite the greater hydrodynamic radius of nitrite. Investigations are underway to understand how the compositional and dynamical heterogeneities of the ion networks at high concentrations affect rheological and transport properties.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL); Energy Frontier Research Centers (EFRC) (United States). Interfacial Dynamics in Radioactive Environments and Materials (IDREAM)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE
- Grant/Contract Number:
- AC05-76RL01830; FWP 68932
- OSTI ID:
- 2216982
- Alternate ID(s):
- OSTI ID: 2337910
- Report Number(s):
- PNNL-SA-189626
- Journal Information:
- ChemComm, Vol. 59, Issue 97; ISSN 1359-7345
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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