Macroporous monoliths for trace metal extraction from seawater
Abstract
The viability of seawater-based uranium recovery depends on the uranium adsorption rate and capacity, since the concentration of uranium in the oceans is relatively low (3.3 gL-1). An important consideration for a fast adsorption is to maximize the adsorption properties of adsorbents such as surface areas and pore structures, which can greatly improve the kinetics of uranium extraction and the adsorption capacity simultaneously. Following this consideration, macroporous monolith adsorbents were prepared from the copolymerization of acrylonitrile (AN) and N,N -methylenebis(acrylamide) (MBAAm) based on a cryogel method using both hydrophobic and hydrophilic monomers. The monolithic sorbents were tested with simulated seawater containing a high uranyl concentration (–6 ppm) and the uranium adsorption results showed that the adsorption capacities are strongly influenced by the ratio of monomer to the crosslinker, i.e., the density of the amidoxime groups. Furthermore, the preliminary seawater testing indicates the high salinity content of seawater does not hinder the adsorption of uranium.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1252140
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 62; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; amidoxime; seawater; cryogel; monolith; uranium
Citation Formats
Yue, Yanfeng, Mayes, Richard T., Gill, Gary, Kuo, Li -Jung, Wood, Jordana, Binder, Andrew J., Brown, Suree, and Dai, Sheng. Macroporous monoliths for trace metal extraction from seawater. United States: N. p., 2015.
Web. doi:10.1039/C5RA02131F.
Yue, Yanfeng, Mayes, Richard T., Gill, Gary, Kuo, Li -Jung, Wood, Jordana, Binder, Andrew J., Brown, Suree, & Dai, Sheng. Macroporous monoliths for trace metal extraction from seawater. United States. https://doi.org/10.1039/C5RA02131F
Yue, Yanfeng, Mayes, Richard T., Gill, Gary, Kuo, Li -Jung, Wood, Jordana, Binder, Andrew J., Brown, Suree, and Dai, Sheng. Fri .
"Macroporous monoliths for trace metal extraction from seawater". United States. https://doi.org/10.1039/C5RA02131F. https://www.osti.gov/servlets/purl/1252140.
@article{osti_1252140,
title = {Macroporous monoliths for trace metal extraction from seawater},
author = {Yue, Yanfeng and Mayes, Richard T. and Gill, Gary and Kuo, Li -Jung and Wood, Jordana and Binder, Andrew J. and Brown, Suree and Dai, Sheng},
abstractNote = {The viability of seawater-based uranium recovery depends on the uranium adsorption rate and capacity, since the concentration of uranium in the oceans is relatively low (3.3 gL-1). An important consideration for a fast adsorption is to maximize the adsorption properties of adsorbents such as surface areas and pore structures, which can greatly improve the kinetics of uranium extraction and the adsorption capacity simultaneously. Following this consideration, macroporous monolith adsorbents were prepared from the copolymerization of acrylonitrile (AN) and N,N -methylenebis(acrylamide) (MBAAm) based on a cryogel method using both hydrophobic and hydrophilic monomers. The monolithic sorbents were tested with simulated seawater containing a high uranyl concentration (–6 ppm) and the uranium adsorption results showed that the adsorption capacities are strongly influenced by the ratio of monomer to the crosslinker, i.e., the density of the amidoxime groups. Furthermore, the preliminary seawater testing indicates the high salinity content of seawater does not hinder the adsorption of uranium.},
doi = {10.1039/C5RA02131F},
journal = {RSC Advances},
number = 62,
volume = 5,
place = {United States},
year = {Fri May 29 00:00:00 EDT 2015},
month = {Fri May 29 00:00:00 EDT 2015}
}
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