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

Journal Article · · Chemistry Select
 [1];  [1];  [2];  [3];  [4];  [4];  [2];  [1];  [1];  [1];  [5]
  1. Marine Sciences Laboratory, Pacific Northwest National Laboratory, Sequim WA 98382 USA
  2. Oak Ridge National Laboratory, Oak Ridge TN 37831 USA
  3. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley CA 94720 USA
  4. Department of Chemistry, University of Idaho, Moscow ID 83844 USA
  5. Rosensteil School of Marine and Atmospheric Chemistry, University of Miami, Miami FL 33149 USA

The apparent enthalpy and entropy of the complexation of uranium (VI) and vanadium (V) with amidoxime ligands grafted onto polyethylene fiber was determined using time series measurements of adsorption capacities in natural seawater at three different temperatures. The complexation of uranium was highly endothermic, while the complexation of vanadium showed minimal temperature sensitivity. Amidoxime-based polymeric adsorbents exhibit significantly increased uranium adsorption capacities and selectivity in warmer waters.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1421330
Report Number(s):
PNNL-SA-126070; AF5855000
Journal Information:
Chemistry Select, Vol. 3, Issue 2; ISSN 2365-6549
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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conference January 2012

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Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets journal November 2019