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Title: Uranium Resource Recovery from Desalination Plant Feed and Reject Water Using Amidoxime Functionalized Adsorbent

Abstract

With global demand for nuclear power expected to rise, new nuclear fuel resources must be explored to ensure the viability and sustainability of nuclear power. Uranium recovery from seawater is one potential source, though the low concentration of uranium in seawater is a significant obstacle. As a concentrate of seawater, desalination brine reject would have a significantly higher uranyl concentration. In this work, the adsorption of uranium and competing ions in brine reject is investigated. Adsorption experiments were performed over 84 days in 5-gallon batch tanks with amidoxime adsorbents and samples taken from the feed seawater and reverse osmosis brine reject of the Tampa Bay Desalination Plant. The aqueous concentration and adsorbed mass of uranium, zinc, copper, iron, vanadium, calcium, and magnesium were determined through inductively coupled plasma mass spectroscopy. Aqueous adsorption modeling was used to simulate speciation and adsorption of these ions under the experimental conditions. The adsorbed mass of uranium in seawater was 6.22 mg/g adsorbent which declined to 3.95 mg/g in brine. This is a result of increased competition from iron and vanadium whose adsorbed masses increased from 1.06 to 3.00 mg/g and 1.05 to 2.67 mg/g, respectively. Good agreement between experimental and predicted results was obtainedmore » for all ions in seawater. Uranium adsorption was overpredicted in brine which may be attributed to the presence of other competing ions and the system not being at equilibrium. Results demonstrate that the influence of competing ions, such as those of iron and vanadium, on uranium adsorption would need to be reduced for brine reject to become a significant uranium resource.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [2];  [1]; ORCiD logo [3]
  1. Georgia Institute of Technology, Atlanta, Georgia 30332, United States
  2. Marine Sciences Laboratory, Pacific Northwest National Laboratory, Sequim, Washington 98382, United States
  3. Georgia Institute of Technology, Atlanta, Georgia 30332, United States; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1497042
Report Number(s):
PNNL-SA-140886
Journal ID: ISSN 0888-5885
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 57; Journal Issue: 50; Journal ID: ISSN 0888-5885
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
Uranium, desalination, seawater, amidoxime-based adsorbent, desalination brine reject

Citation Formats

Wiechert, Alexander I., Ladshaw, Austin P., Gill, Gary A., Wood, Jordana R., Yiacoumi, Sotira, and Tsouris, Costas. Uranium Resource Recovery from Desalination Plant Feed and Reject Water Using Amidoxime Functionalized Adsorbent. United States: N. p., 2018. Web. doi:10.1021/acs.iecr.8b04673.
Wiechert, Alexander I., Ladshaw, Austin P., Gill, Gary A., Wood, Jordana R., Yiacoumi, Sotira, & Tsouris, Costas. Uranium Resource Recovery from Desalination Plant Feed and Reject Water Using Amidoxime Functionalized Adsorbent. United States. doi:10.1021/acs.iecr.8b04673.
Wiechert, Alexander I., Ladshaw, Austin P., Gill, Gary A., Wood, Jordana R., Yiacoumi, Sotira, and Tsouris, Costas. Fri . "Uranium Resource Recovery from Desalination Plant Feed and Reject Water Using Amidoxime Functionalized Adsorbent". United States. doi:10.1021/acs.iecr.8b04673.
@article{osti_1497042,
title = {Uranium Resource Recovery from Desalination Plant Feed and Reject Water Using Amidoxime Functionalized Adsorbent},
author = {Wiechert, Alexander I. and Ladshaw, Austin P. and Gill, Gary A. and Wood, Jordana R. and Yiacoumi, Sotira and Tsouris, Costas},
abstractNote = {With global demand for nuclear power expected to rise, new nuclear fuel resources must be explored to ensure the viability and sustainability of nuclear power. Uranium recovery from seawater is one potential source, though the low concentration of uranium in seawater is a significant obstacle. As a concentrate of seawater, desalination brine reject would have a significantly higher uranyl concentration. In this work, the adsorption of uranium and competing ions in brine reject is investigated. Adsorption experiments were performed over 84 days in 5-gallon batch tanks with amidoxime adsorbents and samples taken from the feed seawater and reverse osmosis brine reject of the Tampa Bay Desalination Plant. The aqueous concentration and adsorbed mass of uranium, zinc, copper, iron, vanadium, calcium, and magnesium were determined through inductively coupled plasma mass spectroscopy. Aqueous adsorption modeling was used to simulate speciation and adsorption of these ions under the experimental conditions. The adsorbed mass of uranium in seawater was 6.22 mg/g adsorbent which declined to 3.95 mg/g in brine. This is a result of increased competition from iron and vanadium whose adsorbed masses increased from 1.06 to 3.00 mg/g and 1.05 to 2.67 mg/g, respectively. Good agreement between experimental and predicted results was obtained for all ions in seawater. Uranium adsorption was overpredicted in brine which may be attributed to the presence of other competing ions and the system not being at equilibrium. Results demonstrate that the influence of competing ions, such as those of iron and vanadium, on uranium adsorption would need to be reduced for brine reject to become a significant uranium resource.},
doi = {10.1021/acs.iecr.8b04673},
journal = {Industrial and Engineering Chemistry Research},
issn = {0888-5885},
number = 50,
volume = 57,
place = {United States},
year = {2018},
month = {11}
}