Uptake of uranium from seawater by amidoxime-based polymeric adsorbent: Marine testing

C. Tsouris, J. Kim, Y. Oyola, R. Mayes, C. Hexel, F. Sostre Gonzalez, C. Janke, S. Dai, G. Gill, L. J. Kuo, J. Wood, K. Y. Choe, A. Pourmand, E. D'Alessandro, K. Buesseler, S. Pike

Research output: Contribution to conferencePaper

Abstract

Amidoxime-based polymer adsorbents in the form of functionalized fibers were prepared at the Oak Ridge National Laboratory (ORNL) and screened in laboratory experiments, in terms of uranium uptake capacity, using spiked uranium solution and seawater samples. Batch laboratory experiments conducted with 5-gallon seawater tanks provided equilibrium information. Based on results from 5-gallon experiments, the best adsorbent was selected for field-testing of uranium adsorption from seawater. Flow-through column tests have been performed at different marine sites to investigate the uranium uptake rate and equilibrium capacity under diverse biogeochemistry. The maximum amount of uranium uptake from seawater tests at Sequim, WA, was 3.3 mg U/g adsorbent after eight weeks of contact of the adsorbent with seawater. This amount was three times higher than the maximum adsorption capacity achieved in this study by a leading adsorbent developed by the Japan Atomic Energy Agency (JAEA), which was 1.1 mg U/g adsorbent at equilibrium. The initial uranium uptake rate of the ORNL adsorbent was 2.6 times higher than that of the JAEA adsorbent under similar conditions. A mathematical model derived from the mass balance of uranium was employed to describe the data.

Original languageEnglish (US)
Pages23-27
Number of pages5
StatePublished - Jan 1 2013
EventInternational Nuclear Fuel Cycle Conference: Nuclear Energy at a Crossroads, GLOBAL 2013 - Salt Lake City, UT, United States
Duration: Sep 29 2013Oct 3 2013

Other

OtherInternational Nuclear Fuel Cycle Conference: Nuclear Energy at a Crossroads, GLOBAL 2013
CountryUnited States
CitySalt Lake City, UT
Period9/29/1310/3/13

    Fingerprint

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

Cite this

Tsouris, C., Kim, J., Oyola, Y., Mayes, R., Hexel, C., Sostre Gonzalez, F., Janke, C., Dai, S., Gill, G., Kuo, L. J., Wood, J., Choe, K. Y., Pourmand, A., D'Alessandro, E., Buesseler, K., & Pike, S. (2013). Uptake of uranium from seawater by amidoxime-based polymeric adsorbent: Marine testing. 23-27. Paper presented at International Nuclear Fuel Cycle Conference: Nuclear Energy at a Crossroads, GLOBAL 2013, Salt Lake City, UT, United States.