Uraninite and fullerene in atmospheric particulates

Satoshi Utsunomiya, Keld A. Jensen, Gerald J. Keeler, Rodney C. Ewing

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

Particulates emitted from coal-burning power plants typically contain very small amounts of uranium (<10 ppm). Because of the extremely low concentrations, the form of the uranium has been unknown. Using a variety of advanced electron microscopy techniques, we have identified for the first time nanocrystals of uraninite, UO2+x encapsulated in carbonaceous matter (≤50 nm) similar to fullerene. We have also identified, for the first time, closely associated fullerenes, C60. The "carbon-caged" nanocrystals of uraninite are protected from the immediate oxidation that would lead to increased mobility of uranium in the environment. Still, the presence of uranium in the very fine fraction of atmospheric particulates provides another pathway for radiation exposure.

Original languageEnglish
Pages (from-to)4943-4947
Number of pages5
JournalEnvironmental Science and Technology
Volume36
Issue number23
DOIs
Publication statusPublished - Dec 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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