FEATURES OF THE ORGANIC CARBON DISTRIBUTION AND ITS RELATIONSHIP WITH CONTENTS OF HEAVY METALS IN BOTTOM SEDIMENTS OF THE NORTHERN DVINA RIVER MOUTH AREA

The paper presents the results of studies of the Kalamitsky Bay bottom sediments pollution level with microelements and heavy metals (Pb, Zn, Cu, Ni, Co, Cr, V, As, Sr, Ti, Fe, Mn) in comparison with the content of these microelements and heavy metals in the Balaklava Bay sediments. The paper analyzes data obtained during expeditions on the R/V Professor Vodyanitsky in the Kalamitsky Gulf in August 2011 (seaward part) and on the R/V Rioni in September 2012 (coastal area) as well as in the Balaklava Bay in October 2018. Content of microelements and heavy metals in bottom sediments of the studied water areas was determined by the X-ray fluorescence method using Spectroscan MAX-G device. For the water area of the Kalamitsky Gulf, the features of the studied trace element spatial distribution are considered, groups of trace elements with different spatial distribution patterns are identified. The correlation analysis determined influence of physicochemical characteristics of the sediments on distribution and accumulation of trace elements. In the water area of the Kalamitsky Gulf, a statistically significant correlation was observed of nickel, iron and zinc content with the clay fraction; dependance of increased concentrations of zinc, nickel and chrome on the content of organic carbon and predominance of lead in highcarbonate sediments. For the Balaklava Bay, the maximum positive values of correlations with the pelitic-silty fraction were noted for iron, manganese, vanadium and chrome; organic carbon correlates with chrome, iron, nickel and copper, whereas carbonates correlate with strontium. Similar patterns were observed earlier in the Sevastopol region bays, Feodosiya Gulf and Kerch Strait.

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Migration of heavy metals in system of coastal soil – bottom sediments – plants of the Khodtsa river during summer mean water in 2019

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES FISHING INDUSTRY ◽

10.24143/2072-9502-2020-2-67-74 ◽

2020 ◽

Vol 2020 (2) ◽

pp. 67-74

Author(s):

Zhanna Sergeevna Makakhaniuk ◽

Valentina Mikhailovna Zubkova ◽

Lyubov Anatolievna Rozumnaya

Keyword(s):

Heavy Metals ◽

Bottom Sediments ◽

Aquatic Vegetation ◽

River Mouth ◽

Petroleum Products ◽

Small River ◽

Laboratory Research ◽

Intermediate Point ◽

Higher Aquatic Vegetation ◽

Environmental Monitoring System

The article describes the purpose of the work, which is determining the distribution and relationships between the composition of pollutants in coastal soil, bottom sediments and higher aquatic vegetation in the small river Khodtsa. There have been presented the data of the laboratory research based on the results of the field work onselecting samples, on concentration of toxicants (cadmium, lead, iron, nitrogen, ammonium and petroleum products) in deposit media, as well as in Carex aquatilis plants of the small river Hodza. This plant species is limiting throughout the river due to the low intensity of biological absorption. The studies were carried out during the summer low water season in 2019 on the river section from the source (Elektrostal city) to the river mouth in the area of Pavlovsky Posad. In all the studied objects there have been found increased concentrations of iron. In the coastal ground and bottom sediments the pollution with heavy metals is manifested to a much greater extent: at the source and intermediate point. Petroleum products and ammonia nitrogen are distributed unevenly in space. A correlation analysis of the experimental data obtained in the components of the environment of the studied territory (the Khodtsa river) was performed. In general, the highest measurement results are observed in the upper reaches of the small river Khodtsa in the industrial city of Elektrostal. The obtained data on the heavy metals migration in the system “сoastal ground – bottom sediments – higher aquatic vegetation” of the small river Khodtsa can be successfully used as indicators an environmental monitoring system and serve as the basis for organizing further research, as well as for developing a strategy for environmental management and environmental protection in the Moscow Region.

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Combined influence of river discharge and wind on littoral nematode communities of a river mouth area of Lake Constance

Aquatic Ecology ◽

10.1007/s10452-006-9076-9 ◽

2007 ◽

Vol 41 (2) ◽

pp. 231-242 ◽

Cited By ~ 2

Author(s):

A. Witthöft-Mühlmann ◽

W. Traunspurger ◽

K. O. Rothhaupt

Keyword(s):

River Discharge ◽

River Mouth ◽

Mouth Area ◽

Lake Constance ◽

Nematode Communities ◽

River Mouth Area

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Why should the Odra River mouth area not be regarded as an estuary? A geologist's point of view

Oceanological and Hydrobiological Studies ◽

10.2478/v10009-007-0011-8 ◽

2007 ◽

Vol 36 (2) ◽

Cited By ~ 2

Author(s):

Andrzej Osadczuk ◽

Stanisław Musielak ◽

Ryszard Borówka

Keyword(s):

Coastal Lagoons ◽

River Mouth ◽

Mouth Area ◽

Point Of View ◽

River Mouth Area ◽

Open Sea ◽

Odra River ◽

Flow Through ◽

The Baltic ◽

Shallow Water Body

Why should the Odra River mouth area not be regarded as an estuary? A geologist's point of viewThe authors find no arguments that would justify application of the term "estuary" to the area of the Odra River discharge into the Baltic Sea. The physiography, geology, and hydrology of the Odra river mouth show that the area possesses many more characteristics typical of flow-through coastal lagoons than those of estuaries. Of key importance in this respect is the Szczecin Lagoon, an extensive, shallow water body separated from the open sea by a barrier intersected by three narrow and long straits. The lagoonal nature of the area is demonstrated also by its geological history.

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