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Title: Temperature Dependence of Uranium and Vanadium Adsorption on Amidoxime-Based Adsorbents in Natural Seawater

Abstract

Recent advances in the development of amidoxime-based adsorbents have made it highly promising for seawater uranium extraction. However, there is a great need to understand the influence of temperature on the uranium sequestration performance of the adsorbents in natural seawater. Here in this work, the apparent enthalpy and entropy of the sorption of uranium (VI) and vanadium (V) with amidoxime-based adsorbents were determined in natural seawater tests at 8, 20, and 31 °C that cover a broad range of ambient seawater temperature. The sorption of U was highly endothermic, producing apparent enthalpies of 57 ± 6.0 and 59 ± 11 kJ mol-1 and apparent entropies of 314 ± 21 and 320 ± 36 J K-1 mol-1, respectively, for two adsorbent formulations. In contrast, the sorption of V showed a much smaller temperature sensitivity, producing apparent enthalpies of 6.1 ± 5.9 and -11 ± 5.7 kJ mol-1 and apparent entropies of 164 ± 20 and 103 ± 19 J K-1 mol-1, respectively. This new thermodynamic information suggests that amidoxime-based adsorbents will deliver significantly increased U adsorption capacities and improved selectivity in warmer waters. A separate field study of seawater uranium adsorption conducted in a warm seawater site (Miami, FL, USA) confirmmore » the observed strong temperature effect on seawater uranium mining. Lastly, this strong temperature dependence demonstrates that the warmer the seawater where the amidoxime-based adsorbents are deployed the greater the yield for seawater uranium extraction.« less

Authors:
 [1];  [1]; ORCiD logo [2];  [3];  [4];  [4]; ORCiD logo [2];  [1];  [1];  [1];  [5]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Marine Sciences Laboratory
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
  4. Univ. of Idaho, Moscow, ID (United States). Department of Chemistry
  5. University of Miami, FL (United States). Rosensteil School of Marine and Atmospheric Chemistry
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1422590
Alternate Identifier(s):
OSTI ID: 1417215
Grant/Contract Number:  
AC05-00OR22725; AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry Select
Additional Journal Information:
Journal Volume: 3; Journal Issue: 2; Journal ID: ISSN 2365-6549
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES

Citation Formats

Kuo, Li-Jung, Gill, Gary A., Tsouris, Costas, Rao, Linfeng, Pan, Horng-Bin, Wai, Chien M., Janke, Christopher James, Strivens, Jonathan E., Wood, Jordana R., Schlafer, Nicholas, and D'Alessandro, Evan K. Temperature Dependence of Uranium and Vanadium Adsorption on Amidoxime-Based Adsorbents in Natural Seawater. United States: N. p., 2018. Web. doi:10.1002/slct.201701895.
Kuo, Li-Jung, Gill, Gary A., Tsouris, Costas, Rao, Linfeng, Pan, Horng-Bin, Wai, Chien M., Janke, Christopher James, Strivens, Jonathan E., Wood, Jordana R., Schlafer, Nicholas, & D'Alessandro, Evan K. Temperature Dependence of Uranium and Vanadium Adsorption on Amidoxime-Based Adsorbents in Natural Seawater. United States. doi:10.1002/slct.201701895.
Kuo, Li-Jung, Gill, Gary A., Tsouris, Costas, Rao, Linfeng, Pan, Horng-Bin, Wai, Chien M., Janke, Christopher James, Strivens, Jonathan E., Wood, Jordana R., Schlafer, Nicholas, and D'Alessandro, Evan K. Tue . "Temperature Dependence of Uranium and Vanadium Adsorption on Amidoxime-Based Adsorbents in Natural Seawater". United States. doi:10.1002/slct.201701895. https://www.osti.gov/servlets/purl/1422590.
@article{osti_1422590,
title = {Temperature Dependence of Uranium and Vanadium Adsorption on Amidoxime-Based Adsorbents in Natural Seawater},
author = {Kuo, Li-Jung and Gill, Gary A. and Tsouris, Costas and Rao, Linfeng and Pan, Horng-Bin and Wai, Chien M. and Janke, Christopher James and Strivens, Jonathan E. and Wood, Jordana R. and Schlafer, Nicholas and D'Alessandro, Evan K.},
abstractNote = {Recent advances in the development of amidoxime-based adsorbents have made it highly promising for seawater uranium extraction. However, there is a great need to understand the influence of temperature on the uranium sequestration performance of the adsorbents in natural seawater. Here in this work, the apparent enthalpy and entropy of the sorption of uranium (VI) and vanadium (V) with amidoxime-based adsorbents were determined in natural seawater tests at 8, 20, and 31 °C that cover a broad range of ambient seawater temperature. The sorption of U was highly endothermic, producing apparent enthalpies of 57 ± 6.0 and 59 ± 11 kJ mol-1 and apparent entropies of 314 ± 21 and 320 ± 36 J K-1 mol-1, respectively, for two adsorbent formulations. In contrast, the sorption of V showed a much smaller temperature sensitivity, producing apparent enthalpies of 6.1 ± 5.9 and -11 ± 5.7 kJ mol-1 and apparent entropies of 164 ± 20 and 103 ± 19 J K-1 mol-1, respectively. This new thermodynamic information suggests that amidoxime-based adsorbents will deliver significantly increased U adsorption capacities and improved selectivity in warmer waters. A separate field study of seawater uranium adsorption conducted in a warm seawater site (Miami, FL, USA) confirm the observed strong temperature effect on seawater uranium mining. Lastly, this strong temperature dependence demonstrates that the warmer the seawater where the amidoxime-based adsorbents are deployed the greater the yield for seawater uranium extraction.},
doi = {10.1002/slct.201701895},
journal = {Chemistry Select},
number = 2,
volume = 3,
place = {United States},
year = {2018},
month = {1}
}

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Cited by: 7 works
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Figures / Tables:

Fig. 1 Fig. 1: The amidoxime-based polyethylene fibers containing cyclic imide dioxime (glutarimidedioxime) and open-chain amidoxime (glutardiamidoxime).

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