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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year

IMPACT FACTOR 2012: 1.373
5-year IMPACT FACTOR: 1.424
Rank 6 out of 34 in category Nuclear Science & Technology in the 2012 Thomson Reuters Journal Citation Report/Science Edition

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X-ray absorption fine structure spectroscopy of plutonium complexes with bacillus sphaericus

Petra J. Panak / C. H. Booth / D. L. Caulder / J. J. Bucher / D. K. Shuh / Heino Nitsche

Citation Information: Radiochimica Acta. Volume 90, Issue 6, Pages 315–321, ISSN (Print) 0033-8230, DOI: 10.1524/ract.2002.90.6.315, September 2009

Publication History:
Received:
September 12, 2001
Accepted:
January 14, 2002
Published Online:
2009-09-25

Summary

Knowledge of the plutonium complexes formed with bacterial cells is critical for predicting the influence of microbial interactions on the migration behavior of actinides in the environment. This investigation describes the interaction of plutonium(VI) with cells of the aerobic soil bacteria, Bacillus sphaericus. The studies include the quantification of carboxylate and phosphate functional groups on the cell walls by potentiometric titration and the determination of the plutonium speciation by X-ray absorption fine structure (XAFS). Extended-XAFS (EXAFS) was used to determine the identity of the Pu(VI) interfacial complex with the bacteria, and the Pu(VI) was found primarily bound to phosphate groups on the cell surface. No carboxylate complexation was detected.

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