Partitioning of silver,beryllium and molybdenum among chemical fractions in the sediments from the Labe (Elbe) river in Central Bohemia,Czech Rep. |
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| Authors: | Z Borovec |
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| Institution: | (1) Faculty of Sciences, Charles University, Albertov 6, CS-128 43 Praha 2, Czech Republic |
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| Abstract: | Sequential extraction of the fine fraction ( 63 µm) of the bottom sediments of the Labe river in Central Bohemia indicates that the readily reducible sediment fraction is a major reservoir of silver for release into the aqueous phase. Molybdenum is preferentially mobilized by ion-exchange, while beryllium is accumulated in all the chemical fractions of the sediments, especially in the moderately reducible and the organic/sulphidic phases.Contamination of the aquatic system from anthropogenic sources is characterized by the formation of relatively unstable chemical forms and only a small portion of these elements remain in the stable residual fraction. |
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