Forms of metals in the littoral sediments in Kandalaksha Bay of the White Sea in the Russian Arctic |
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Authors: | S E Koukina G A Korneeva T A Bek |
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Affiliation: | 1.Shirshov Institute of Oceanology,Russian Academy of Sciences,Moscow,Russia;2.White Sea Biological Station,Moscow State University,Moscow,Russia |
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Abstract: | According to the results of the comparative study performed of the littoral sediments sampled in small inlets of Kandalaksha
Bay (the White Sea in the Russian Arctic), the metals (Fe, Mn, Cu, Zn, Pb, Cr, and Li) occur mainly in a biogeochemical-stable
mineral-incorporated form, which comprises 77–99% of the total metal content. The ratio of the liable form, which is easily
extracted by a weak acid, is on average 3.2% for the total Fe, 2.0% for Mn, 1.7% for Cr, 5.6% for Pb, 5.8% for Zn, 6.5% for
Cu, and is negligible for Li. The concentrations of the most studied trace metals are below the threshold level according
to the environmental quality guidelines (the sediment analysis). The ratio of the metal forms evidences the natural origin
of the elevated concentrations of both Zn and Cr in the sediments. |
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