ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The efficiency of natural wetlands for entrapment and concentration of aqueous uranium(U) was investigated in former uranium mining regions in the eastern part of Germany.Hydrogeochemical analyses of sediments, plants, surface and pore waters from selected small-sizedwetlands show that U is predominantly accumulated in an environment where sulfate reduction isinsignificant. From soil sequential extraction it is known that the bulk of U is retained in moderatelylabile forms, predominantly as organically bound or acid soluble phases (“specifically adsorbed”).Uranium could be identified by SEM/EDX, indicating that biosorption of U as cation or complex isimportant. However, the highest U concentrations prevail in Al-rich, inorganic agglomerates ofcolloidal phases. These agglomerates are as well very often non-specifically adsorbed to organicmatter (plant debris, microorganisms) in the soils, promoting indirect biosorption of U
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.275.pdf
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