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Bicarbonate Elution of Uranium from Amidoxime-Based Polymer Adsorbents for Sequestering Uranium from Seawater

Journal Article · · Chemistry Select
 [1];  [1];  [2];  [2];  [3];  [3];  [4];  [4];  [4]
  1. Univ. of Idaho, Moscow, ID (United States). Dept. of Chemistry
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Marine Sciences Lab.
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
+ Show Author Affiliations
Uranium adsorbed on amidoxime-based polyethylene fibers in simulated seawater can be quantitatively eluted using 3 M KHCO3 at 40°C. Thermodynamic calculations are in agreement with the experimental observation that at high bicarbonate concentrations (3 M) uranyl ions bound to amidoxime molecules are converted to uranyl tris-carbonato complex in the aqueous solution. The elution process is basically the reverse reaction of the uranium adsorption process which occurs at a very low bicarbonate concentration (~10-3 M) in seawater. The bicarbonate elution is followed by a NaOH treatment to remove natural organic matter adsorbed on the polymer adsorbent, in real seawater experiments. Furthermore, by using the sequential bicarbonate and NaOH elution, the adsorbent is reusable after rinsing with deionized water and the recycled adsorbent shows no loss of uranium loading capacity based on real seawater experiments.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1362216
Alternate ID(s):
OSTI ID: 1400853
OSTI ID: 1356490
Journal Information:
Chemistry Select, Journal Name: Chemistry Select Journal Issue: 13 Vol. 2; ISSN 2365-6549
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

A Relativistic DFT Probe of Thorium and Protactinium Complexes Supported by Heterocalix[4]arene and Redox Properties of Early-Middle Actinides journal May 2018
Polypropylene nonwoven fabric modified with oxime and guanidine for antibiofouling and highly selective uranium recovery from seawater journal May 2019
A highly efficient uranium grabber derived from acrylic fiber for extracting uranium from seawater journal January 2020

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Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
amidoxime
bicarbonate
polyethyethylene
seawater
uranium