Paper Titles
Bioremediation of Acid Mine Drainage in an Uranium Deposit
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Sustainable Approach for the Immobilization of Metals in the Saturated Zone: In Situ Bioprecipitation
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Development of a Novel Biological System for Removing Manganese from Contaminated Waters
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In-Lake Bioreactors for the Treatment of Acid Mine Water in Pit Lakes
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Biosorption as Main Uranium Accumulation Mechanism in Wetlands
p.275
Integrated System to Biological Solubilization and Precipitation of Heavy Metals
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Remediation of Acid Mine Drainage by Means of Biological and Chemical Methods
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Bioremediation In Situ of an Alkaline Soil Polluted with Heavy Metals
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Mine Waste Stabilization with Biosludge and Ca Carbonate Residues: Column Experiments
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Biosorption as Main Uranium Accumulation Mechanism in Wetlands

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Abstract:

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-sized wetlands show that U is predominantly accumulated in an environment where sulfate reduction is insignificant. From soil sequential extraction it is known that the bulk of U is retained in moderately labile 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 is important. However, the highest U concentrations prevail in Al-rich, inorganic agglomerates of colloidal phases. These agglomerates are as well very often non-specifically adsorbed to organic matter (plant debris, microorganisms) in the soils, promoting indirect biosorption of U.

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Periodical:

Advanced Materials Research (Volumes 20-21)

Pages:

275-278

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.20-21.275

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Online since:

July 2007

Authors:

Angelika Schöner, Georg Büchel, Martin Sauter

Keywords:

Biosorption, Remediation, Uranium, Wetlands

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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