X-ray absorption fine structure spectroscopy of plutonium complexes with bacillus sphaericus
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Petra J. Panak
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.
© Oldenbourg Wissenschaftsverlag, München
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Articles in the same Issue
- Excitation functions of proton induced reactions on 68Zn from threshold up to 71 MeV, with specific reference to the production of 67Cu
- X-ray absorption fine structure spectroscopy of plutonium complexes with bacillus sphaericus
- Separation of neptunium and plutonium from acidic medium using 3-phenyl-4-benzoyl-5-isoxazolone
- A statistical study of 238U and 234U/238U distributions in coral samples from the Egyptian shoreline of the north-western Red Sea and in fossil mollusk shells from the Atlantic coast of High Atlas in Morocco: Implications for 230Th/234U dating
- Ion-molecule reactions of Ru+ and Os+ with oxygen in a Penning trap
- Inner-sphere, outer-sphere and ternary surface complexes: a TRLFS study of the sorption process of Eu(III) onto smectite and kaolinite
- Radiochemical neutron activation analysis of total trace tin and determination of its differentiated compounds in aquatic biota
- Rate effected adsorption profile of selenium-thiocyanate complex onto polyurethane foam
- Production and radiochemical separation of rhodium-105 for radiopharmaceutical applications
