Journal article
27 Al Pulsed Field Gradient, Diffusion-NMR Spectroscopy of Solvation Dynamics and Ion Pairing in Alkaline Aluminate Solutions
The journal of physical chemistry. B, Vol.122(48), pp.10907-10912
12/06/2018
Handle:
https://hdl.handle.net/2376/102898
PMID: 30354130
Abstract
Pulsed field gradient nuclear magnetic resonance (PFG-NMR) measurements were successfully applied to the
Al ( I = 5/2) nucleus in concentrated electrolytes to investigate the diffusion of aluminate ions [Al(OH)
] in simulant high-level nuclear waste (3 M NaOH) between 25 and 85 °C. The temperature-dependent diffusion coefficients obtained from
H,
Na, and
Al PFG-NMR were well fit by a Vogel-Fulcher-Tammann model and a power law equation. Comparison of
Al diffusion coefficients of 0.1 M Al(OH)
in ∼3 M MOH (where M = Na
, K
, (CH
)
N
) at room temperature varied in agreement with the expected changes in solution viscosity via Stokes-Einstein relationship, confirming that the dominant Al species at these conditions are Al(OH)
monomers. This
Al PFG-NMR study extends an established methodology to a previously unexplored nucleus enabling this experimental technique to be leverage for exploring ion transport, speciation, and solution structure in concentrated electrolytes.
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Details
- Title
- 27 Al Pulsed Field Gradient, Diffusion-NMR Spectroscopy of Solvation Dynamics and Ion Pairing in Alkaline Aluminate Solutions
- Creators
- Trent R Graham - The Voiland School of Chemical and Biological Engineering , Washington State University , Pullman , Washington 99164 , United StatesKee Sung Han - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesMateusz Dembowski - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesAnthony J Krzysko - Department of Chemistry , Washington State University , Pullman , Washington 99164 , United StatesXin Zhang - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesJianzhi Hu - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesSue B Clark - Department of Chemistry , Washington State University , Pullman , Washington 99164 , United StatesAurora E Clark - Department of Chemistry , Washington State University , Pullman , Washington 99164 , United StatesGregory K Schenter - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesCarolyn I Pearce - Pacific Northwest National Laboratory , Richland , Washington 99354 , United StatesKevin M Rosso - Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
- Publication Details
- The journal of physical chemistry. B, Vol.122(48), pp.10907-10912
- Academic Unit
- Chemistry, Department of
- Publisher
- United States
- Identifiers
- 99900546549601842
- Language
- English
- Resource Type
- Journal article