Patterns of mercury distribution in bottom sediments along the Severnaya Dvina-White Sea section |
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| Authors: | Yu A Fedorov A E Ovsepyan A P Lisitzin I V Dotsenko A N Novigatskii and V P Shevchenko |
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| Abstract: | This paper analyses the data on the distribution of mercury in the surface layer of bottom sediments (0–5 cm) obtained in
course of sampling trips within the mouth region of the Severnaya Dvina River and the White Sea area. A total of 170 analyses
for mercury were performed. Such wide-scale determination of the mercury content in the bottom sediments was carried out for
the first time in the study region. The patterns of mercury distribution in the Severnaya Dvina River-White Sea transect are
revealed and described. It is shown that the marginal filter of the Severnaya Dvina River facilitates cosedimentation of the
main portion of anthropogenic mercury with suspended matter. This drastically decreases the risk of penetration of mercury
to the White Sea waters and partially (with the gravity current) to the Barents Sea waters. In general, the Severnaya Dvina
River is characterized by mercury pollution of a local scale within the urban territories. No regional pollution of the White
Sea off the marginal filter was revealed. |
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