Long-term dynamics of mercury pollution of the Bratsk reservoir bottom sediments, Baikal region, Russia

Pastukhov, Mikhail V.; Poletaeva, V. I.; Tirskikh, Elvira

doi:10.1088/1755-1315/321/1/012041

Cited by 17 publications

(5 citation statements)

References 14 publications

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“…As anthropogenic polluting activities continue to change and permafrost thaw intensifies land–freshwater linkages ( 13 , 14 , 30 ), hydrochemical and biological monitoring programs building on continuous, long-term data collection will be imperative to capture changes in Hg cycling at northern high latitudes ( 53 ). Future research should also prioritize 1) investigating the fate of PHg within northern reservoirs, lakes, and coastal regions, where large accumulations of Hg in sediments ( 54 ) may influence methylmercury dynamics and accumulation within food webs; 2) modeling of permafrost region Hg cycling ( 30 ) which incorporates potential effects from regional human activities on Hg mass budgets; and 3) tracing sources of fluvial Hg, to discriminate between permafrost and nonpermafrost Hg sources and to elucidate Hg cycling ( 55 ).…”

Section: Resultsmentioning

confidence: 99%

Multidecadal declines in particulate mercury and sediment export from Russian rivers in the pan-Arctic basin

Zolkos

Zhulidov²,

Gurtovaya³

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Significance Russian rivers are the predominant source of riverine mercury to the Arctic Ocean, where methylmercury biomagnifies to high levels in food webs. Pollution controls are thought to have decreased late–20th-century mercury loading to Arctic watersheds, but there are no published long-term observations on mercury in Russian rivers. Here, we present a unique hydrochemistry dataset to determine trends in Russian river particulate mercury concentrations and fluxes in recent decades. Using hydrologic and mercury deposition modeling together with multivariate time series analysis, we determine that 70 to 90% declines in particulate mercury fluxes were driven by pollution reductions and sedimentation in reservoirs. Results suggest that Russian rivers likely dominated over all other sources of mercury to the Arctic Ocean until recently.

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Section: Resultsmentioning

confidence: 99%

Multidecadal declines in particulate mercury and sediment export from Russian rivers in the pan-Arctic basin

Zolkos

Zhulidov²,

Gurtovaya³

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…In the Bratsk Reservoir, the decrease in anthropogenic impact led to better water quality characteristics [47]. However, the results of layer-by-layer sampling of its bottom sediments showed the accumulation of the vast majority of trace elements in the middle layers of the bottom sediments formed during the period of the greatest anthropogenic impact [67]. In this regard, the bottom sediments of the Irkutsk Reservoir have not been sufficiently studied.…”

Section: Irkutsk Reservoirmentioning

confidence: 99%

Hydrochemical Characteristics and Water Quality Assessment of Irkutsk Reservoir (Baikal Region, Russia)

Pastukhov,

Poletaeva,

Hommatlyyev

2023

Water

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The Irkutsk Reservoir, belonging to the largest unified freshwater Baikal–Angara system, is an important source of drinking water in the region. Therefore, studies of its hydrochemical characteristics are of prime importance in deciding on the role of anthropogenic activity in water quality. The water samples were collected across the reservoir in 2007, 2012, and 2021 and then were analyzed for major ions and trace elements. The data revealed that the distribution of HCO3−, SO42−, Cl−, Ca2+, Mg2+, Na+ and K+ is stable across the reservoir. Trace element concentrations varied from 1.13 to 15.39 µg L−1 for Al, from <DL to 0.39 µg L−1 for Cr, from 0.39 to 23.12 µg L−1 for Mn, from 1.25 to 53.22 µg L−1 for Fe, from 0.005 to 0.100 µg L−1 for Co, from 0.20 to 1.98 µg L−1 for Cu, from <DL to 13.40 µg L−1 for Zn, from 0.25 to 0.48 µg L−1 for As, from 0.004 to 0.127 µg L−1 for Cd, from <DL to 0.195 µg L−1 for Sn, from <DL to 0.0277 µg L−1 for Cs, from <DL to 1.13 µg L−1 for Pb, from <DL to 0.0202 µg L−1 for Th, and from 0.27 to 0.75 µg L−1 for U. The concentrations of all major ions and trace elements in water were below the drinking water standards. CF values showed considerable and high contamination of samples with Al, Mn, Fe, Co, Cu, Cd, Sn, Pb, and Th. PLI values classified the majority of water samples as water with baseline levels of pollutants, and part of the samples was classified as either polluted or highly polluted.

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“…Pastukhov, Poletaeva, and Tirskikh (2019) had identified and monitored Hg contamination by anthropogenic industrial activities near the Baikal region of Russia where about 1,327 tons of Hg were released into the environment by activities of chlor‐alkali plant operations. But Hg concentration was decreased from 2.03 to 0.79 mg/kg in the past 20 years due to decreasing plant's operations and environmental awareness although Hg concentration was higher than the concentration of Hg background level; and water availability and sediment transport rate were the two most important factors for Hg deposition in the sediment.…”

Section: Contamination Identification and Monitoringmentioning

confidence: 99%

Contaminated aquatic sediments

Hossain

2020

Water Environment Research

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Aquatic sediments are contaminated by different anthropogenic activities and natural deposition. This review manuscript has discussed on published manuscript in 2019 based on monitoring and identification of contaminants, GIS application and isotopic evaluation for monitoring of pollutants, physicochemical and biochemical fate and transport of the pollutants as well as remediation and toxicity analysis so that environmental and ecological impacts due to pollution can be minimized.

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Long-term dynamics of mercury pollution of the Bratsk reservoir bottom sediments, Baikal region, Russia

Cited by 17 publications

References 14 publications

Multidecadal declines in particulate mercury and sediment export from Russian rivers in the pan-Arctic basin

Multidecadal declines in particulate mercury and sediment export from Russian rivers in the pan-Arctic basin

Hydrochemical Characteristics and Water Quality Assessment of Irkutsk Reservoir (Baikal Region, Russia)

Contaminated aquatic sediments

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