Mercury in White Sea Bottom Sediments: Distribution, Sources, and Deposition Chronology

Fedorov, Yu. A.; Ovsepyan, Asya; Savitsky, V. A.; Lisitzin, A. P.; Шевченко, В. П.; Novigatsky, А. N.

doi:10.1134/s0001437019010028

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…Weak peak of specific activity in lake Malyy Liman at a depth of 33 cm is most likely a consequence of redeposition under the influence of gravitational-sedimentary landslide processes of the layer contaminated with artificial radionuclide. A similar phenomenon has been described by changes in mercury content in the bottom sediment section of the Kandalaksha Bay of the White Sea [1]. Thus, we can conclude that the lower boundary of the anthropogenic impact layer in both lakes is at a depth of 30-33 cm.…”

Section: Radionuclide Compositionsupporting

confidence: 87%

Granulometric, elemental and isotopic composition of bottom sediments of lakes of mountainous areas as a reflection of transformations in their watersheds

Fedorov,

Mikhailenko,

Dotsenko

et al. 2023

E3S Web Conf.

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The article provides a brief description of the geological and tectonic structure and technogenic transformations in the drainage basin of two lakes of the Krasnodar Krai (Malyy Liman and Abrau). They belong to a single natural-technogenic system. On the example of these mountain lakes, the grain-size distribution, elemental (mercury) and isotopic (cesium-137) composition of bottom sediments was studied. The use of a set of methods and technologies, including those developed by the authors, made it possible to determine the parameters of the anthropogenic impact layer in bottom sediments and the chronology of its formation. It is closely related to natural and man-made events in the drainage basin.

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Section: Radionuclide Compositionsupporting

confidence: 87%

Granulometric, elemental and isotopic composition of bottom sediments of lakes of mountainous areas as a reflection of transformations in their watersheds

Fedorov,

Mikhailenko,

Dotsenko

et al. 2023

E3S Web Conf.

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Distribution and bioavailability of mercury in the surface sediments of the Baltic Sea

Kwasigroch

Bełdowska

Jędruch

et al. 2021

Environ Sci Pollut Res

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The study aimed to determine the level of mercury (Hg) and its labile and stable forms in the surface sediments of the Baltic Sea. The work considers the impact of current and historical sources of Hg on sediment pollution, together with the influence of different environmental parameters, including water inflows from the North Sea. Surface sediments (top 5 cm) were collected in 2016–2017 at 91 stations located in different areas of the Baltic Sea, including Belt Sea, Arkona Basin, Bornholm Basin, Gdańsk Basin, West Gotland Basin, East Gotland Basin, and the Bothnian Sea. Besides, the particulate matter suspended in the surface and near-bottom water was also collected. The analysis of total Hg concentration and individual Hg forms in collected samples was carried out using a 5-step thermodesorption method. This method allows for the identification of three labile and thus biologically available, fractions of Hg, which are mercury halides, organic Hg, mercury oxide and sulphate. Two stable fractions, mercury sulphide and residual Hg, were also determined. The highest Hg concentrations, reaching 341 ng g−1, were measured in the highly industrialised Kiel Bay, which was additionally a munition dumping site during and after World War II. High Hg level, ranging from 228 to 255 ng g−1, was also recorded in the surface sediments of the Arkona Basin, which was a result of the cumulative effect of several factors, such as deposition of Hg-rich riverine matter, favourable hydrodynamic conditions and military activities in the past. The relatively elevated Hg concentrations, varying from 60 to 264 ng g−1, were found in the Gdańsk Basin, a region under strong anthropopressure and dominated by soft sediments. The sum of labile Hg in sediments was high and averaged 67% (with the domination of organic Hg compounds), which means that a large part of Hg can be released to the water column. It was found that the water inflows from the North Sea intensify the remobilisation of Hg and its transformation into bioavailable labile forms. As a consequence, the load of Hg introduced into the trophic chain can increase. Despite the significant reduction of Hg emission into the Baltic in the last decades, surface sediments can be an important secondary Hg source in the marine ecosystem. This is especially dangerous in the case of the western Baltic Sea.

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Assessment of mercury levels in modern sediments of the East Siberian Sea

Аксентов

Астахов

Ivanov

et al. 2021

Marine Pollution Bulletin

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Mercury in White Sea Bottom Sediments: Distribution, Sources, and Deposition Chronology

Cited by 9 publications

References 10 publications

Granulometric, elemental and isotopic composition of bottom sediments of lakes of mountainous areas as a reflection of transformations in their watersheds

Granulometric, elemental and isotopic composition of bottom sediments of lakes of mountainous areas as a reflection of transformations in their watersheds

Distribution and bioavailability of mercury in the surface sediments of the Baltic Sea

Assessment of mercury levels in modern sediments of the East Siberian Sea

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