Bottom sediments and their role in surface water pollution with mercury (with a special reference to the Northern Dvina River Mouth and the Dvina Bay of the White Sea) |
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Authors: | Yu A Fedorov A E Ovsepyan V B Korobov I V Dotsenko |
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Institution: | 1.Southern Federal University,Rostov-on-Don,Russia;2.Arkhangel’sk Center for Hydrometeorology and Monitoring of Environment with Regional Functions,Arkhangel’sk,Russia |
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Abstract: | Mercury content in bottom estuarine sediments of the Northern Dvina River and the Dvina Bay of the White Sea is studied. Major
regularities of the behavior of the metal and its compounds in bottom sediments of the water area are defined. The role of
lithological composition, pH and Eh of the environment, the presence of hydrogen sulfide for determining the content and forms
of the mercury presence in the bottom sediments of the region are studied. The sediments related to technogenic formations
are specified. The paths and forms of mercury coming from bottom sediments to the near-bottom water level are detected, and
the methylmercury content in the sediments is calculated. |
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