Yury Tatsy - Academia.edu (original) (raw)

Papers by Yury Tatsy

&lt;p&gt;Studies of dated cores of bottom sediments from Arctic lakes to determin... more &lt;p&gt;Studies of dated cores of bottom sediments from Arctic lakes to determine flows and the history of sedimentation of heavy metals have been carried out since the beginning of the 90s. This is largely due to the need to understand the spatial and temporal trends of pollution in the Arctic and the ways of influencing wildlife and people, especially in a changing climate. Arctic lakes are sensitive indicators of global changes in the environment and climate, as well as the effects of regional and transboundary transport of pollutants. Bottom sediments of Arctic lakes that are not subject to direct anthropogenic influences are a kind of paleoclimatic and paleogeochemical archives that contain information about biogeochemical processes on the catchment and in the reservoir itself, informatively reflect environmental changes.&lt;/p&gt;&lt;p&gt;Arctic mercury is of particular interest. Besides the fact that this metal is an element of the first hazard class, it is a global pollutant. Unfortunately, the published data on mercury in the bottom sediments of Arctic lakes are much less than for other heavy metals. To some extent, this is due to analytical problems in determining low mercury levels.&lt;/p&gt;&lt;p&gt;The aim of the research is to assess the dynamics of sedimentation of mercury and identify a possible anthropogenic contribution to the period of industrial activity.&lt;/p&gt;&lt;p&gt;The results of research of mercury distribution in sediments are presented for cores from five Arctic lakes &amp;#8211; NARY_1-2 (Malozemelskaya tundra), NARY_2-4 and 9-1 (Lovetsky Island, the mouth of the Pechora River), Langtibejto (Yamal Peninsula) and Gol&amp;#8217;tsovoe (Gydan Peninsula). Sedimentation rates were estimated using 210Pb and 137Cs geochronology. Chemical composition, granulometry and loss on ignition were determined layer by layer for all sediment cores.&lt;/p&gt;&lt;p&gt;The layer-by-layer analysis of all cores of bottom sediments showed that the distribution of mercury differs significantly from the distribution of other elements by a significantly stronger enrichment of the surface layers. The nature of this distribution in column NARY1_2 coincides with both the beginning of the industrial period (end of the 19th century) and the beginning of the work of the Norilsk industrial complex.&lt;/p&gt;&lt;p&gt;Enrichment of the surface layer of sediments can be caused not only by transboundary transport of mercury, but also by an increased content of organic matter in the upper horizons of sediments.&lt;/p&gt;&lt;p&gt;The nature of the distribution of mercury along the length of the columns and the distribution over fractions with different particle sizes showed that the finest fraction does not always determine the total concentration in the slice. At the same time, large particles (&gt; 0.2 mm) with a high mercury concentration are present in the columns.&lt;/p&gt;&lt;p&gt;The data obtained show that, unlike other elements, the studied lakes are conditionally background for mercury.&lt;/p&gt;&lt;p&gt;This work was supported by the Russian Science Foundation (project 18-17-00184)&lt;/p&gt;

Goldschmidt2021 abstracts, 2021

The paper presents data on the features of Hg distribution and its input in dated bottom sediment... more The paper presents data on the features of Hg distribution and its input in dated bottom sediments in two Arctic lakes: Longtibeito on the Yamal Peninsula and Gol'tsovoe on the Gydan Peninsula. The Hg concentrations are much higher in the upper layers of the sediments, and the enrichment factors are 14 and 10 at background concentrations of 4.3 and 5.2 ng g-1 , respectively. The sedimentation rates in both lakes are fairly high: the rate for Longtibeito Lake varied relatively little and is 660 ± 75 g m-2 year-1 on average, and that for Gol'tsovoe Lake decreased toward upper layers from 791 to 513 g m-2 year-1. The fluxes of total Hg in these lakes are principally different, but their lithogenic fluxes are approximately equal: 5-7 μg m-2 year-1. Mercury flux into Longtibeito Lake is much higher than into Gol'tsovoe Lake and amounts to 41.5 μg m-2 year-1. Layer-by-layer grain-size analysis with determination of Hg in each fraction, highlights differences between the lakes. The total Hg concentration in a layer in Gol'tsovoe Lake is controlled by the fine fraction (<0.045 mm), whereas this fraction in Longtibeito Lake dominates because of the high mass percentage. It has been shown that bottom sediments contain large (>0.2 mm) particles with high Hg concentrations. One of the likely reasons for the increase in Hg concentration in the upper layers may have been the development of oil and gas fields in this territory.

Atomic Spectroscopy, 1994

Two methods are described for the GFAAS analysis of a sorbent concentrate used in the determinati... more Two methods are described for the GFAAS analysis of a sorbent concentrate used in the determination of Cd, Co, Cu, Ni, and Pb in high-mineralized waters and of Se in biological samples. The sorbent concentrate was introduced into the graphite furnace in the form of a powder as well as in suspension. Ultrasonic mixing and introduction of the suspension by autosampler reduces the RSD to 0.02-0.03% and enables the determination of elements at lower determination limits : Cd = 0.01 μg/L, Co = 0.05 μg/L, Cu and Ni = 0.4 μg/L, Pb = 0.2 μg/L, and Se = 0.05 μg/L.

E3S Web of Conferences, 2013

The mercury content in bottom sediments of Kalkan Lake, of the Uchala district, the Southern Ural... more The mercury content in bottom sediments of Kalkan Lake, of the Uchala district, the Southern Ural. It was assumed that high concentrations of mercury in fish due to pollution of bottom sediments as a result of amalgamation at developing of gold placers. Detailed study of distribution of different elements in sediments show close association Hg with the chalcophylic elements, whose anomalies do not have technogenic nature. Association of mercury with the elements-companions of gold placers is evidence of basic contribution of natural mercury to its anomalous accumulation in sediments and fish. This is result of steady long-term natural mercury pollution.

Geochemistry International, 1998

Geochemistry International, 1999

Abstract-We studied interactions of various m ineral species o f mercury with fulvic acids (FAs) ... more Abstract-We studied interactions of various m ineral species o f mercury with fulvic acids (FAs) from river water and hum ic acids (HAs) from peat, which constitute the major families of humus acids. It was shown that mercury solubility increases greatly when elemental mercury or mercury sulfide reacts w ith FAs, due to the formation of strong anionic mercury fiilvate complexes with the com position H g : FAs = 1 : 1. Complex formation processes favor m ercury dissemination in the environment. In contrast, HAs-high-molecular-mass, low-solubility varieties of humus acids-exhibit high sorptive capacities to mercury (II) ions up to 350-370 mg mercury per gram HA. HAs perform as an efficient geochemical barrier in the mercury cycle o f the Earth's crust, promoting mercury concentration in soils, river particulates, and river and marine sediments.

Geochemistry International, 2020

Bottom sediment cores from the Langtibeito (Yamal Peninsula) and Gol'tsovoe (Gydan Peninsula) bac... more Bottom sediment cores from the Langtibeito (Yamal Peninsula) and Gol'tsovoe (Gydan Peninsula) background arctic lakes are studied. The sedimentation rate estimated from 210 Pb and 137 Cs accounted for 0.17 and 0.20 cm/y, respectively. The element composition, grain-size composition, and loss on ignition were determined layer-by-layer in both cores. The element concentrations in the bottom sediments of both lakes throughout the entire core length are at the background level. The mercury content in the subsurface layers of sediments in both lakes, unlike other elements, was much higher than its local background contents. This is likely related to its atmospheric influx through transboundary transport. The comparison of diatom and grain-size data revealed the rebuilding of lake ecosystems in response to lake shoaling. The bioindication methods are promising for reconstructing the recent climatic changes in arctic regions.

Geochemistry International, 2017

⎯Mercury emissions during production of blister copper at the smelter Karabashmed are roughly est... more ⎯Mercury emissions during production of blister copper at the smelter Karabashmed are roughly estimated. The high mercury content in the atmospheric dust, soils, lake sediments of the Karabash geotechnogenic system shows that emissions of the plant are the main source of environmental contamination. The mercury content in soils of residential territory ranges within 0.2-11.4 mg/kg, reaching 15 mg/kg in soils of the impact zone. The maximum mercury content in the bottom sediments of Lake Serebry is 32 mg/kg. The high degree of contamination by other elements of emissions (Cu, Pb, Zn, As, Cd) is also demonstrated. Obtained results justify the need for the instrumental control of mercury in emissions.

Geochemistry International, 2018

⎯The paper considerations of the possibility of the low-temperature (1000°C) and high-temperature... more ⎯The paper considerations of the possibility of the low-temperature (1000°C) and high-temperature (>1500°C) thermal decomposition of solid samples of suspensions and the selective fractional evaporation-condensation of elements in specialized electrothermal crucible and rod atomizers for the purposes of direct atomic-absorption analysis. The approach is applied to analyze samples of riverine and marine suspensions for Ag, Cd, and Tl.

Geochemistry International, 2015

The enrichment of different environments (atmospheric depositions, soil, water, bottom sedi ments... more The enrichment of different environments (atmospheric depositions, soil, water, bottom sedi ments) in elements that are transferred with atmospheric emissions of a copper smelter is demonstrated by the example of Lake Serebry, which is situated in the zone of direct and indirect air borne anthropogenic impact. The bioaccumulation and bioconcentartion of elements in the organs and tissues of fish from Lake Serebry are estimated in comparison with those of Lake Seliger, which is located far away from mining met allurgical complexes.

E3S Web of Conferences, 2013

Technogenic geochemical anomaly was formed as a result of large-scale copper-smelting production ... more Technogenic geochemical anomaly was formed as a result of large-scale copper-smelting production run for almost hundred years without any ecological standards in Karabash region. Environmental assessment of the area affected by the Cu smelter plant after the plant's substantial modernization shows that atmospheric emissions remain sufficiently high, and re-vegetation that began emerging during the time the plant was closed has slowed down after the plant reopened. The assessment of contamination of soil, bottom sediments and surface water showed extremely high concentrations of heavy metals.

Russian Meteorology and Hydrology, 2012

ABSTRACT

Book of the 18 International Conference on Heavy Metals in the Environment, 12 to 15 September 20... more Book of the 18 International Conference on Heavy Metals in the Environment, 12 to 15 September 2016, Ghent, Belgium This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. – 101 – 18th International Conference on avy Metals in the Environment 12 to 15 September 2016, Ghent, Belgium ICHMET 2016 Proceedings of the 18 International Confer nce on Heavy Metals in the Environment, 12 to 15 September 2016, Ghent, Belgium

Goldschmidt2021 abstracts, 2021

Atomic Spectroscopy, 1994

E3S Web of Conferences, 2013

Geochemistry International, 1998

Geochemistry International, 1999

Geochemistry International, 2020

Geochemistry International, 2017

Geochemistry International, 2018

Geochemistry International, 2015

E3S Web of Conferences, 2013

Russian Meteorology and Hydrology, 2012

ABSTRACT