Accumulation of Subcolloidal Fraction Elements of Bottom Sediments in Amur Bay (Sea of Japan)

Polyakov, D. M.; Utkin, I. V.

doi:10.1134/s0001437018070044

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Here, in 1980, the content of Zn, Cu, Pb, Hg, and Ni increased 1.5-5.0-fold as compared to background concentrations corresponding to the period before 1900 [24]. This was followed by a decline in industrial volumes since 1990 that contributed to the improvement of the environmental situation [25] and decrease of the concentrations of heavy metals in water [9,26,27]. In the period until 2012, there was a gradual self-purification of marine waters, accompanied by a 2-8-fold decrease of the content of HM in bottom sediments, except for Cu and Cd, which could be due to the reduction of the discharge of household waste into the aqueous environment [19].…”

Section: Introductionmentioning

confidence: 94%

“…Chaotic fluctuations of concentrations of Cr and Pb are observed in the BS: from 0 to In Ussuri Bay's profiles (Figure 6, BS-3), during the transition from 22 cm to 10 cm, an increase of the concentration of all the studied HM by two to three times is observed, which could be related to the period of active development of the territories and local industry. The subsequent slowdown in the industrial development rate since the 1990s could contribute to a decrease of the level of environmental impact, which is reflected in a consistent decrease of the concentration of HM in the upper 10 cm layer of the BS [17,27].…”

Section: Assessment Of Hm Content In the Core Profilementioning

confidence: 99%

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Migration Features and Regularities of Heavy Metals Transformation in Fresh and Marine Ecosystems (Peter the Great Bay and Lake Khanka)

Tokar

Kuzmenkova

Rozhkova

et al. 2023

Water

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Peter the Great Bay and Lake Khanka are among the most important structural and industrial fishing parts of the Far East coastal ecosystem, which are used by a number of countries such as Russia, China, Korea, Japan, etc. At the same time, the active use of water resources, as well as industrial activities deployed on the coastal part of these reservoirs, are accompanied by a constant flow of pollutants into the water area. Among them, one can include heavy metals; their entry and migration are currently not fully controlled. There exists an important scientific and ecological task to study the features of heavy metal migration and transformation in natural objects. Bottom sediments act as a substrate for hydrobionts and, at the same time, serve as accumulators of pollutants, so that they can be used as the main component of the coastal-shelf ecosystem. The geochemical assessment of the behavior of heavy metals in the bottom sediments of Ussuri Bay and Amur Bay (Sea of Japan) and Lake Khanka (Xingkai) has been performed. Qualitative and quantitative elemental compositions of the bottom sediments have been established by means of the inductively coupled plasma-mass spectrometry (ICP-MS), atomic absorption spectrometry (AAS), and X-ray fluorescence analysis (XRF), whereas a correlation with the concentration of elements in seawater above sediments has been provided. The main phases of anthropogenic components as well as their relationship with an increased content of heavy metals have been established using X-ray diffraction analysis (XRD). Average values of the concentration of elements in the bottom sediments of Peter the Great Bay decrease in the following row: Fe > Cu > Cr > Zn ≥ Pb > Mn > Ni, and for Lake Khanka: Pb > Cu > Mn > Fe > Cr > Zn > Ni. Here, the excessive contents of Cr, Fe, Cu, Zn, and Pb in sea bottom sediments by 6, 32, 7, 3, and 4 times as compared with background values are the result of the formation of a large amount of carbonate and iron-oxide phases. At the same time, it was shown that, during the transition from the estuarine (coastal) area of river flow to the central (closer to the outlet to the ocean), the concentration of biogenic metals (Ni, Zn, Pb, Cu) generally decreased 2–4-fold along the profile, which was associated with the formation of their hydroxides and carbonates in the area of mixing of freshwater and seawater followed by that of complex compounds or absorption. A significant anthropogenic impact is observed in the lake sediments, which is demonstrated by the excess of Pb concentration by 6700 times, as compared with the Clarke number of the lithosphere. The non-uniform distribution of heavy metals along the core profile has been established, which is related to different contents of aluminosilicate and iron oxide phases in the form of hematite and magnetite. The sedimentation rate has been established by means of granulometric and radiometric analysis and equaled to 0.45 mm/year in Ussuri Bay, 1.6 mm/year in Amur Bay, and 0.43–0.50 mm/year in Lake Khanka. By calculating the distribution coefficients of heavy metals in the ‘water–deposits’ system, some features of migration and accumulation of individual elements have been established. To assess the potential pollution of the marine areas, the geoaccumulation index (Igeo) and the pollution factor (Kc) have been calculated. In comparison with the maximum permissible concentrations of the Russian Federation (MPC), the World Health Organization (WHO), the US Environmental Protection Agency (US EPA), and environmental protection agencies of China and Japan, Peter the Great Bay has an excess of Mn—2-fold, Fe—2-fold, Zn—3-fold, whereas in Lake Khanka, the situation is even less favorable, in particular, the excess of Mn is 79-fold, Fe—35-fold, Cu—2-fold, Zn—3–4-fold, which is clearly determined by the closeness of the water basin and the lack of water exchange. In comparison with the lithosphere Clarke number, the sediments of both water basins, as well as the coastal soil of the lake, are enriched with Pb and depleted with Cr, Ni, and Zn. The highest values of Igeo in both water basins have been observed for Pb, and equaled 12–16 in Peter the Great Bay and 6000 in Khanka Lake. Based on the data obtained, the areas with the greatest pollution caused by natural and anthropogenic factors have been identified.

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Section: Introductionmentioning

confidence: 94%

Section: Assessment Of Hm Content In the Core Profilementioning

confidence: 99%

Migration Features and Regularities of Heavy Metals Transformation in Fresh and Marine Ecosystems (Peter the Great Bay and Lake Khanka)

Tokar

Kuzmenkova

Rozhkova

et al. 2023

Water

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“…The final link in the cycle of technogenic elements in the landscape is the bottom sediments of reservoirs. Accumulation of pollutants in bottom sediments may cause secondary contamination of reservoirs [7]. A high concentration of copper was found in the bottom sediments of the small Manga and Gilchin rivers (Table 2).…”

Section: Heavy Metal Content In Bottom Sediments Of Small Riversmentioning

confidence: 99%

The content of heavy metals in the habitat of birds, Zeya-Bureya plain

Pakusina,

Platonova,

Fokin

et al. 2023

E3S Web of Conf.

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From 2019 to 2021, the content of heavy metals in the components of the aquatic ecosystem, which is the habitat of birds on the territory of the Zeya-Bureya plain, was studied (water, sediments, macrophytes, bird feathers). High levels of iron and manganese were found in the water of small rivers. Due to heavy rains and floods, heavy metals were washed out of the surface layers of soil in agricultural fields into rivers. High concentrations of copper and lead were found in the bottom sediments of small rivers. Agricultural pollution of aquatic ecosystems affected the accumulation of lead and manganese in macrophytes. Bird feathers contained the highest amounts of iron, zinc, copper, and manganese, and the lowest amounts of cobalt and cadmium. The feathers of protected bird species such as Swan Goose, Red-crowned Crane, Hooded Crane and Daurian white-naped Crane contained lead 13.5 -38.2 mg/kg, cadmium 0.17 - 0.51 mg/kg. The elements in the feathers of birds were of exogenous origin. Birds are bioindicators of anthropogenic pollution. Researches in this direction are necessary for an estimation of ecological risk of environment and acceptance of measures on its protection.

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“…Accumulation of pollutants in bottom sediments may cause secondary contamination of reservoirs. Therefore, the accumulation of heavy metals in bottom sediments is actively studied [15][16][17]. The level of heavy metals in the bottom sediments of the small river Arguzikha decreases in the series: FeMnZnСuPbCd ( Table 5).…”

Section: Heavy Metal Content In the Bottom Sediments Of The Arguzikhamentioning

confidence: 99%

Ecological and chemical characteristics of small river Arguzikha (Zeya-Bureya plain, Russia)

Пакусина

Платонова

2020

E3S Web Conf.

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The article considers the results of research from 2015 to 2019 on the study of hydrochemical indicators and the content of heavy metals in the ecosystem components of the small Arguzikha river , a left-Bank tributary of the Amur river (water, bottom sediments, macrophytes, birds ’ feathers). High oxygen content in the water (8.8-15.9 mgO2/dm3) and high BOD5 values (6-12 mgO2/dm3) in the middle and lower reaches of the Arguzikha river indicate the process of eutrophication. The value of permanganate oxidability (6.8-15.5 mgO/dm3) characterizes the high content of organic substances in water. In the spring, nitrate nitrogen (3.45-6.39 mgN-NO3-/dm3) was found in the water of the Arguzikha river, which had a pyrogenic origin. In the summer the rainy season was dominated by ammonium nitrogen (2.34 mgN-NН +/dm3). The high content of total phosphorus (0.337-0.609 mg/dm3) in the river water was in the spring. In the spring of 2015, the concentration of lead in the lower reaches of the river reached 6.36 µg/dm3, during the subsequent time, the lead content in the Arguzikha water was less than the MPC. Toxic concentrations of lead (> 30 mg / kg) and manganese (> 300 mg/kg) were found in macrophytes of Nymphoides peltata and Myriophyllum spicatum. In the feathers of waterfowl of the Arguzikha river the content of heavy metals decreases in a row Fe>Zn>Cu>Pb>Mn>Сг>Ni>Cо>Cd. The feathers of Anas acuta and Anas querquedula contained Pb 17.7 mg/kg and 22.2 mg/kg, Cd 0.15 mg/kg and 0.08 mg/kg, respectively.

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Accumulation of Subcolloidal Fraction Elements of Bottom Sediments in Amur Bay (Sea of Japan)

Cited by 4 publications

References 10 publications

Migration Features and Regularities of Heavy Metals Transformation in Fresh and Marine Ecosystems (Peter the Great Bay and Lake Khanka)

Migration Features and Regularities of Heavy Metals Transformation in Fresh and Marine Ecosystems (Peter the Great Bay and Lake Khanka)

The content of heavy metals in the habitat of birds, Zeya-Bureya plain

Ecological and chemical characteristics of small river Arguzikha (Zeya-Bureya plain, Russia)

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