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Title: The relative viscosity of NaNO 3 and NaNO 2 aqueous solutions

Abstract

In aqueous solution, both nitrate and nitrite are planar, monovalent, and have the same elements but different sizes and charge densities. Comparing the viscosity of NaNO 2 and NaNO 3 aqueous solutions provides an opportunity to determine the relative importance of anion size versus strength of anion interaction with water. The viscosity of aqueous NaNO 2 and NaNO 3 were measured over a temperature and concentration range relevant to nuclear waste processing. The viscosity of NaNO 2 solutions was consistently larger than NaNO 3 under all conditions, even though nitrate is larger than nitrite. This was interpreted in terms of quantum mechanical charge field molecular dynamics calculations that indicate that nitrite forms more and stronger hydrogen bonds with water per oxygen atom than nitrate. Furthermore, these hydrogen bonds inhibit rotational motion required for fluid flow, thus increasing the nitrite solution viscosity relative to that of an equivalent nitrate solution.

Authors:
 [1];  [2];  [3]
  1. Washington River Protection Solutions, LLC, Richland, WA (United States)
  2. United States Dept. of Energy, Richland, WA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1437023
Report Number(s):
PNNL-SA-130851
Journal ID: ISSN 0167-7322; PII: S0167732218305993
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Molecular Liquids
Additional Journal Information:
Journal Name: Journal of Molecular Liquids; Journal ID: ISSN 0167-7322
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Sodium nitrate; Sodium nitrite; Viscosity; Hanford; Mode coupling

Citation Formats

Reynolds, Jacob G., Mauss, Billie M., and Daniel, Richard C. The relative viscosity of NaNO3 and NaNO2 aqueous solutions. United States: N. p., 2018. Web. doi:10.1016/j.molliq.2018.05.036.
Reynolds, Jacob G., Mauss, Billie M., & Daniel, Richard C. The relative viscosity of NaNO3 and NaNO2 aqueous solutions. United States. doi:10.1016/j.molliq.2018.05.036.
Reynolds, Jacob G., Mauss, Billie M., and Daniel, Richard C. Wed . "The relative viscosity of NaNO3 and NaNO2 aqueous solutions". United States. doi:10.1016/j.molliq.2018.05.036.
@article{osti_1437023,
title = {The relative viscosity of NaNO3 and NaNO2 aqueous solutions},
author = {Reynolds, Jacob G. and Mauss, Billie M. and Daniel, Richard C.},
abstractNote = {In aqueous solution, both nitrate and nitrite are planar, monovalent, and have the same elements but different sizes and charge densities. Comparing the viscosity of NaNO2 and NaNO3 aqueous solutions provides an opportunity to determine the relative importance of anion size versus strength of anion interaction with water. The viscosity of aqueous NaNO2 and NaNO3 were measured over a temperature and concentration range relevant to nuclear waste processing. The viscosity of NaNO2 solutions was consistently larger than NaNO3 under all conditions, even though nitrate is larger than nitrite. This was interpreted in terms of quantum mechanical charge field molecular dynamics calculations that indicate that nitrite forms more and stronger hydrogen bonds with water per oxygen atom than nitrate. Furthermore, these hydrogen bonds inhibit rotational motion required for fluid flow, thus increasing the nitrite solution viscosity relative to that of an equivalent nitrate solution.},
doi = {10.1016/j.molliq.2018.05.036},
journal = {Journal of Molecular Liquids},
number = ,
volume = ,
place = {United States},
year = {Wed May 09 00:00:00 EDT 2018},
month = {Wed May 09 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 9, 2019
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