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Title: High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification

Abstract

The utilization of anion-exchange resins to separate and purify plutonium from various sources represents a major bottleneck in the throughput that can be achieved when this step is part of a larger separation scheme. Slow sorption kinetics and broad elution profiles necessitate long contact times with the resin, and the recovered Pu is relatively dilute, requiring the handling of large volumes of hazardous material. In this work, high internal-phase emulsion (HIPE) foams were prepared with a comonomer containing a dormant nitroxide. Using surface-initiated nitroxide-mediated polymerization, the foam surface was decorated with a brush of poly(4-vinylpyridine), and the resulting materials were tested under controlled flow conditions as anion-exchange media for plutonium separations. It was discovered that the grafted foams demonstrated greater ionexchange capacity per unit volume than a commercial resin commonly used for Pu separations and had narrower elution profiles. The ion-exchange sites (quaternized pyridine) were exposed on the surface of the large pores of the foam, resulting in convective mass transfer, the driving force for the excellent separation properties exhibited by the synthesized polyHIPE foams.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [1]
  1. Department of Chemistry and Biochemistry, University of South Carolina, 541 Main Street, Horizon I Building, Columbia, South Carolina 29208, United States
  2. Environmental Stewardship, Savannah River National Laboratory, Savannah River Site, Building 773-A, Aiken, South Carolina 29808, United States
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1461245
Alternate Identifier(s):
OSTI ID: 1548291
Grant/Contract Number:  
AC09-08SR22470
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Name: ACS Omega Journal Volume: 3 Journal Issue: 7; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Pribyl, Julia G., Taylor-Pashow, Kathryn M. L., Shehee, Thomas C., and Benicewicz, Brian C. High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification. United States: N. p., 2018. Web. doi:10.1021/acsomega.8b01057.
Pribyl, Julia G., Taylor-Pashow, Kathryn M. L., Shehee, Thomas C., & Benicewicz, Brian C. High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification. United States. https://doi.org/10.1021/acsomega.8b01057
Pribyl, Julia G., Taylor-Pashow, Kathryn M. L., Shehee, Thomas C., and Benicewicz, Brian C. Mon . "High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification". United States. https://doi.org/10.1021/acsomega.8b01057.
@article{osti_1461245,
title = {High-Capacity Poly(4-vinylpyridine) Grafted PolyHIPE Foams for Efficient Plutonium Separation and Purification},
author = {Pribyl, Julia G. and Taylor-Pashow, Kathryn M. L. and Shehee, Thomas C. and Benicewicz, Brian C.},
abstractNote = {The utilization of anion-exchange resins to separate and purify plutonium from various sources represents a major bottleneck in the throughput that can be achieved when this step is part of a larger separation scheme. Slow sorption kinetics and broad elution profiles necessitate long contact times with the resin, and the recovered Pu is relatively dilute, requiring the handling of large volumes of hazardous material. In this work, high internal-phase emulsion (HIPE) foams were prepared with a comonomer containing a dormant nitroxide. Using surface-initiated nitroxide-mediated polymerization, the foam surface was decorated with a brush of poly(4-vinylpyridine), and the resulting materials were tested under controlled flow conditions as anion-exchange media for plutonium separations. It was discovered that the grafted foams demonstrated greater ionexchange capacity per unit volume than a commercial resin commonly used for Pu separations and had narrower elution profiles. The ion-exchange sites (quaternized pyridine) were exposed on the surface of the large pores of the foam, resulting in convective mass transfer, the driving force for the excellent separation properties exhibited by the synthesized polyHIPE foams.},
doi = {10.1021/acsomega.8b01057},
journal = {ACS Omega},
number = 7,
volume = 3,
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acsomega.8b01057

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Cited by: 5 works
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