Uranium speciation in plants
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A. Günther
Summary
Detailed knowledge of the nature of uranium complexes formed after the uptake by plants is an essential prerequisite to describe the migration behavior of uranium in the environment. This study focuses on the determination of uranium speciation after uptake of uranium by lupine plants. For the first time, time-resolved laser-induced fluorescence spectroscopy and X-ray absorption spectroscopy were used to determine the chemical speciation of uranium in plants. Differences were detected between the uranium speciation in the initial solution (hydroponic solution and pore water of soil) and inside the lupine plants. The oxidation state of uranium did not change and remained hexavalent after it was taken up by the lupine plants. The chemical speciation of uranium was identical in the roots, shoot axis, and leaves and was independent of the uranium speciation in the uptake solution. The results indicate that the uranium is predominantly bound as uranyl(VI) phosphate to the phosphoryl groups. Dandelions and lamb´s lettuce showed uranium speciation identical to lupine plants.
© 2003 Oldenbourg Wissenschaftsverlag GmbH
Artikel in diesem Heft
- The influence of ozone on ligand-assisted extraction of 239Pu and 241Am from Rocky Flats soil
- Biosorption of americium-241 by Candida sp.
- Uranium speciation in plants
- A fluorescence spectroscopic study on the speciation of Cm(III) and Eu(III) in the presence of organic chelates in highly basic solutions
- Synthesis and characterization of neptunyl(VI) and plutonyl(VI) orthosilicates
- Determination of uranium(IV) hydrolysis constants and solubility product of UO2·xH2O
- A comparision of the extraction of carrier-free 176,177W and 99Mo with that of U, Th, Am, Cm, La, Ce, Tm, Yb, Lu and Hf into Aliquat 336 in toluene from nitric, phosphoric, and sulphuric acid media
- Field study of the migration of 90Sr in a weak loess aquifer
- Standardisation of the prompt gamma activation analysis method
Artikel in diesem Heft
- The influence of ozone on ligand-assisted extraction of 239Pu and 241Am from Rocky Flats soil
- Biosorption of americium-241 by Candida sp.
- Uranium speciation in plants
- A fluorescence spectroscopic study on the speciation of Cm(III) and Eu(III) in the presence of organic chelates in highly basic solutions
- Synthesis and characterization of neptunyl(VI) and plutonyl(VI) orthosilicates
- Determination of uranium(IV) hydrolysis constants and solubility product of UO2·xH2O
- A comparision of the extraction of carrier-free 176,177W and 99Mo with that of U, Th, Am, Cm, La, Ce, Tm, Yb, Lu and Hf into Aliquat 336 in toluene from nitric, phosphoric, and sulphuric acid media
- Field study of the migration of 90Sr in a weak loess aquifer
- Standardisation of the prompt gamma activation analysis method
