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Open AccessFeature PaperArticle

The Hydrochemistry and Recent Sediment Geochemistry of Small Lakes of Murmansk, Arctic Zone of Russia

1
Institute of the North Industrial Ecology Problems of Kola Science Center of RAS, 184209 Apatity, Russia
2
Institute of Geology of Karelian Research Centre of RAS, 185910 Petrozavodsk, Russia
3
Institute of Limnology RAS, 196105 Saint Petersburg, Russia
4
Saint Petersburg State University, 199034 Saint Petersburg, Russia
*
Author to whom correspondence should be addressed.
Water 2020, 12(4), 1130; https://doi.org/10.3390/w12041130
Received: 6 March 2020 / Revised: 10 April 2020 / Accepted: 11 April 2020 / Published: 15 April 2020
(This article belongs to the Special Issue Geochemistry of Water and Sediment)
This paper presents the first study of five small lakes located in the city of Murmansk. Field work was carried out during 2018–2019. Water samples were collected using a bathometer, while the sediments were sampled using an Ekman grab and Limnos gravity corer. It was found that the water of the studied lakes in Murmansk belong to the sodium group of the chloride class and to the calcium group of the hydrocarbonate class. Compared to the background level, elevated pH, concentrations of the main cations of alkali and alkaline-earth metals, N compounds, total dissolved solids, and heavy metals were found in the lakes, which indicate exposure to anthropogenic impacts. The sediments of the lakes, composed of organomineral and mineral silts, also have an elevated content of heavy metals compared to the background. The most significant excessive concentrations were found for V, Ni, Sb, Pb, Co, Cr, and W. Based on the calculated pollution load index and geoaccumulation index of the sediments, the studied water bodies in Murmansk can be classified as lakes with heavy and extremely heavy pollution levels. The primary pollution sources are emissions from the Murmansk thermal power plant, coal port, road and, rail transport. View Full-Text
Keywords: urban lakes; water and sediment pollution; heavy metals; Murmansk; Arctic urban lakes; water and sediment pollution; heavy metals; Murmansk; Arctic
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Slukovskii, Z.; Dauvalter, V.; Guzeva, A.; Denisov, D.; Cherepanov, A.; Siroezhko, E. The Hydrochemistry and Recent Sediment Geochemistry of Small Lakes of Murmansk, Arctic Zone of Russia. Water 2020, 12, 1130.

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