Viktor Komov | Institute for the Biology of Inland Waters, Russian Academy of Sciences (original) (raw)
Papers by Viktor Komov
ЗДОРОВЬЕ НАСЕЛЕНИЯ И СРЕДА ОБИТАНИЯ - ЗНиСО / PUBLIC HEALTH AND LIFE ENVIRONMENT
Introduction: Mercury is considered by the World Health Organization as one of the top ten chemic... more Introduction: Mercury is considered by the World Health Organization as one of the top ten chemicals of major public health concern. Fish consumption is known to be the main source of exposure to mercury. It has been previously established that freshwater fish of the water bodies of the Vologda Region can be a significant source of mercury exposure in the local population. Objective: To establish the relationship between hair mercury concentrations in residents of the Vologda Region and diseases of the cardiovascular system. Materials and methods: The study involved 849 participants (274 men and 575 women) aged 18 to 94 years living in the city of Cherepovets (Vologda Region: 59° 07' N 37° 54' E). Occipital hair was sampled in accordance with WHO recommendations and then tested using the RA-915M mercury analyzer with a PYRO-915+ pyrolysis attachment (measurement range: 0.002–200 mg/kg) without preliminary sample preparation, by atomic absorption with Zeeman correction of non...
The content of total mercury in the hair of adolescent residents of the industrial center of Nort... more The content of total mercury in the hair of adolescent residents of the industrial center of North-West Russia varied from less than 0.002 to 0.83 mg/kg. The content of total mercury in the hair of males is 1.5-2 times lower than that of females. The relationship between the body mass index of females and the content of total mercury in the hair (for the entire observation period rs=0.28–0.48, at p < 0.05) was observed. It was found that the concentration of metal in the hair of the study participants depended on the frequency of fish consumption. Over a three-year observation period, an increase in the indicator values of the concentration of total mercury in the hair was recorded among 70% of the study participants, on average by 0.03 mg/kg per year. Indicators of the content of total mercury in the hair of females and males in the city of Cherepovets did not exceed the standard values established in Russia and in the world. At the same time, the recorded values of the annual i...
Limnology and Freshwater Biology
. In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Acad... more . In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academy of Sciences have been studying mercury concentrations in the muscles of fish from water bodies situated in different natural and climatic zones. Overall, more than 5000 fish samples from 102 lakes and 35 rivers in Russia were analysed. In the absence of local sources of mercury entering the water body, its concentrations in the fish muscles varied in wide ranges, exceeding two orders of magnitude. Minimum concentration (<0.03 mg/kg wet weight) was recorded in the muscles of omul, rotan (Chinese sleeper), minnow, and bleak (Lake Baikal, Transbaikalia and European Russia). Maximum mercury concentration (2-3 mg/kg wet weight) was recorded in the muscles of perches from lakes in the northwest of Russia (Vologda and Novgorod regions, Karelia). Most of the measurement results ranged from 0.05 to 0.30 mg/kg wet weight. Differences in mercury concentrations in the muscles of fish of the same species, similar in size and from one water body, as a rule, did not exceed ranges of one order of magnitude. In the absence of local mercury sources, mercury concentrations in fish muscles from closely spaced water bodies could have more than tenfold differences.
Limnology and Freshwater Biology, 2022
In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academ... more In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academy of Sciences have been studying mercury concentrations in the muscles of fish from water bodies situated in different natural and climatic zones. Overall, more than 5000 fish samples from 102 lakes and 35 rivers in Russia were analysed. In the absence of local sources of mercury entering the water body, its concentrations in the fish muscles varied in wide ranges, exceeding two orders of magnitude. Minimum concentration (<0.03 mg/kg wet weight) was recorded in the muscles of omul, rotan (Chinese sleeper), minnow, and bleak (Lake Baikal, Transbaikalia and European Russia). Maximum mercury concentration (2-3 mg/kg wet weight) was recorded in the muscles of perches from lakes in the northwest of Russia (Vologda and Novgorod regions, Karelia). Most of the measurement results ranged from 0.05 to 0.30 mg/kg wet weight. Differences in mercury concentrations in the muscles of fish of the same species, similar in size and from one water body, as a rule, did not exceed ranges of one order of magnitude. In the absence of local mercury sources, mercury concentrations in fish muscles from closely spaced water bodies could have more than tenfold differences.
Труды - Институт биологии внутренних вод, Dec 20, 2022
Поступила в редакцию 16.09.2022 Ртуть (Hg) и ее соединения, представляющие риск для здоровья насе... more Поступила в редакцию 16.09.2022 Ртуть (Hg) и ее соединения, представляющие риск для здоровья населения, не занятого на вредных производствах, поступают в организм человека преимущественно с продуктами питания. В первую очередь это морепродукты, рыба и рыбные консервы. В настоящем исследовании были определены концентрации Hg в мышцах представителей разных видов рыб из водоемов Ярославской области. Средние значения содержания ртути варьируют в интервале 0.03-0.41 мг/кг сырой массы. Зарегистрированные уровни накопления металла соответствуют или близки к ранее установленным величинам в мышцах рыб из пресноводных водоемов европейской части России и европейских государств. Отмечена видоспецифичность процесса накопления Hg, зависимость от трофической специализации и размерно-весовых характеристик рыб, типа водоема. Установленные в РФ нормативы по содержанию металла в мышцах мирных (<0.3 мг/кг сырой) и хищных видов рыб (<0.6 мг/кг) превышены у 0.3 и 16% исследованных мирных и хищных рыб, соответственно. Больше всего представителей хищных видов рыб с концентрациями Hg в мышцах, превышающими принятые нормативы, зарегистрировано в малых озерах с заболоченными водосборными бассейнами, меньше-в водохранилищах, редко-в средних по площади водного зеркала озерах. Пределы допустимого содержания ртути в рыбе и рыбной продукции, установленные в РФ, соответствуют или близки к действующим нормативам, принятым в странах Европейского сообщества, США и рекомендациям ВОЗ, хотя детализации регламента по возрастным группам и группам риска не существует.
Transactions of Papanin Institute for Biology of Inland Waters RAS, Dec 20, 2022
Soil invertebrates are the main food resource for birds and small mammals. The migration of mercu... more Soil invertebrates are the main food resource for birds and small mammals. The migration of mercury into the food webs of terrestrial ecosystems is still poorly investigated. The mercury content in soil, earthworms, wolf spiders and harvesters of the forest park zone of Cherepovets (Vologda region) was determined. The collection
of the material was carried out on 5 sites (birch-aspen forest, wet pine forest, dry pine forest, wet meadow, dry meadow) differing in the composition of vegetation and the position in the cascade of geochemical landscapes. The minimum mercury content was found in the soils of the dry meadow (eluvial landscape) – 25 ng/g, the maximum – in the soils of the wet meadow (accumulative landscape) – 188 ng/g. The maximum concentrations of mercury in all sites were found in earthworms – from 261 ng/g in the dry pine forest to 1095 ng/g in the wet meadow. The concentration of mercury in wolf spiders was lower than in earthworms. The minimum values were found in a dry meadow. In all sites, the mercury content in wolf spiders was significantly higher than
in harvesters. There are no significant correlations between the mercury content in soils and the organism of the studied invertebrates.
Sanitarnyj vrač, Feb 27, 2022
The mercury content in the muscle tissue of roach and perch from the reservoirs of the Vologda re... more The mercury content in the muscle tissue of roach and perch from the reservoirs of the Vologda region of the Russian Federation varies from 0,001 to 1,57 mg/kg of raw mass. Using the recommendations of the FAO/WHO, the safe amount of local fish in the diet of the population of the Vologda region is calculated: for adults — 309–1989 kg/week, depending on the type; for children — 83–525 g per week, depending on the type of fish and the age of the child. Using the recommendations of the US EPA, the safe amount of local fish in the diet of the population of the Vologda region is calculated: for adults— 182–350 kg/week, depending on the type; for children— 42–129 g per week, depending on the type of fish and the age of the child. The number of predatory fish in the diet of the population should be two times less than peaceful fish. It was found that the mercury content exceeds the normative levels in place in the Russian Federation (≥ 0,3 μg/g and ≥ 0,6 μg/g, respectively) in 6 % of the fish from non-predatory species and 8 % from predatory fish species. For children of school and preschool age, the proportion of perch that is recommended to be excluded from consumption is 60 and 51 %, respectively; the share of roach is 32 and 18 %, respectively. For the health of the adult population, it may be unsafe to eat more than 30 % of the studied perch and 4 % of the studied roach. English version of the article is available at URL: https://panor.ru/articles/calculation-of-mercury-intake-from-the-consumption-of-wild-fish-by-the-population-of-the-vologda-region/80552.html
The biodiversity of the Selenga river basin and the receiving waters of the lake Baikal, are amon... more The biodiversity of the Selenga river basin and the receiving waters of the lake Baikal, are among the greatest in the world with over 1,700 known endemic species of plants and animals. Mining activities along the Selenga river and its tributaries pose a major threat of chemical contamination, potentially reducing habitat quality and suitability for aquatic species. Moreover, the Selenga river serves as a major water source for the lake Baikal. Little information exists on the chemical contaminant concentrations in the Selenga river basin. Thus, the objectives of our study were to evaluate the concentrations of metals in soil, sediment, and fish in the Selenga. The concentrations of the metals were then compared to thresholds for toxicity to aquatic organisms. We sampled at 16 locations in the Tuul, Selbe, Khangal, Boro, Orkhon, and Selenge rivers in Mongolia in 2010. Concentrations of copper, chromium, nickel, lead and mercury were above predicted thresholds for toxicity at selecte...
International Archives of Occupational and Environmental Health, 2021
The purpose of this work is to study mercury levels in the hair of different social and demograph... more The purpose of this work is to study mercury levels in the hair of different social and demographic groups of the population of the Vologda region in Northwest Russia. This region is selected due to a heterogeneous distribution of rivers and lakes—a resource base for fishing. The mercury content was determined in the hair from the root with a length of about 2 cm. The concentration of total mercury in human hair was determined by the atomic absorption method without preliminary sample preparation using an RA-915M mercury analyzer and a PYRO-915 + pyrolysis unit. The average level of mercury in the human hair was 0.445 μg/g (median 0.220 μg/g). The concentration of mercury in the hair of people older than 44 years (0.875 μg/g) was three times higher than in the hair of children under 18 years of age (0.270 μg/g). People who eat fish less than once per month had a hair mercury concentration of 0.172 μg/g, for 1–2 times a month 0.409 μg/g, once a week 0.555 μg/g, and several times a week 0.995 μg/g. The concentration of mercury in the hair of smokers (0.514 μg/g) was higher than in the hair of non-smokers (0.426 μg/g). Significantly higher concentrations of mercury were observed in the hair of participants from the western part of the region, where reservoirs are the main commercial sources of fish products. The data showed that the main source of people’s mercury intake was fish.
Heliyon, 2020
The main aim of this study was to assess the level of mercury accumulation in the hair of student... more The main aim of this study was to assess the level of mercury accumulation in the hair of students studying in the Vologda Region, Russia. Particular attention is devoted to clarifying the relationship between the metal concentration in the hair and the amount of fish in the diet. It was found that the mercury content in the hair of Vologda Region residents aged 17-21 is in the range from less than 0.002 mg/kg to 1.69 mg/kg, the median of the indicator for the entire sample is 0.14 mg/kg. The median value of mercury content in the hair of males (0.12 mg/ kg) is lower than in the hair of females (0.16 mg/kg). The lowest metal concentrations were observed in individuals living in the city of Cherepovets and the highest metal concentration among the entire sample and in females in the western areas, and males in the eastern areas of the Vologda Region. The concentration of metal in the hair of the urban population is lower than in subjects living in rural areas. A higher metal content in the hair was recorded in individuals whose diet usually contains fish twice a month.
Samara Journal of Science, 2018
Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemica... more Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemicals. The content of mercury in the coat was 136 cats and 113 dogs in the territory of the Vologda Region in Cherepovets. The total mercury concentration in the wool samples was measured on a mercury analyzer RA-915 +. The values of the mercury index in cats range from less than 0,001 mg / kg to 13,00 mg / kg, in dogs from less than 0,001 mg / kg to 1,858 mg / kg. Statistical difference in the content of mercury in wool between cats and dogs was revealed. The Hg content in cats is 3,5 times higher than the dogs have. Comparison analysis showed the concentration of mercury in the wool of cats and dogs have no statistically significant differences. The authors noted that cats had 4 times more mercury who ate fish. The average content of Hg in the wool of dogs is slightly different for those who ate fish.
Ecosystem Transformation, 2019
Проведено исследование содержания ртути (Hg) в мышечной ткани речного окуня (Perca fluviatilis Li... more Проведено исследование содержания ртути (Hg) в мышечной ткани речного окуня (Perca fluviatilis Linnaeus, 1758) из разных плесов Рыбинского водохранилища в период с 1997 по 2012 г. Концентрации Hg в мышцах были выше у окуня из Шекснинского и Волжского плесов, ниже-из Главного и Моложского, так же, как и Hg в донных отложениях из мест обитания рыб. Отмечена зависимость значения показателя от размеров рыб и тенденция к его увеличению в последние десятилетия. Определено содержание ртути в различных органах и тканях окуня. Установлена положительная корреляционная зависимость между значениями показателя во всех исследованных образцах с концентрацией металла в мышечной ткани, в которой она была самой высокой (до 0.91 мг/кг сырой массы). Основная доля аккумулированной рыбой ртути приходится на мышцы.
Ecosystem Transformation, 2019
The influence of forest fire on the gross mercury content in soddy podburs formed in typical fore... more The influence of forest fire on the gross mercury content in soddy podburs formed in typical foreststeppe conditions is studied. The metal concentration in the soils of the control area not affected by the fire is 0.063 ± 0.045 mg/kg at a depth of 0-10 cm, compared to 0.041 ± 0.008 mg/kg in soils of the burnt forest area. The relationship between the content of organic carbon and the amount of mercury in the top 20 cm of the soil profile of burnt areas has not been established (r = 0.26; p = 0.19). In the soils of the control plot, on the contrary, these indicators showed a significant positive correlation (r = 0.74; p ≤ 0.05). The estimated amount of mercury released from the soil during a fire is 3 mg/m 2. The area of forest affected by fires in 2010 in the Voronezh Region was 15,910 ha. Thus, the amount of mercury released into the atmosphere as a result of the combustion of the upper soil layer is estimated at 477.3 kg.
Environmental Monitoring and Assessment, 2018
The long-term dynamics of mercury in bottom sediments of Uglich Reservoir were examined. Samples ... more The long-term dynamics of mercury in bottom sediments of Uglich Reservoir were examined. Samples of the 0-5-cm surface layer of bottom sediment collected during research expeditions in 1958, 1977, 1991, and 2012 were analyzed. An increase in the average mercury concentration from 1958 to 1977 (0.440 ± 0.039 and 0.668 ± 0.065 mg/kg d.w., respectively) was followed by a decrease in 2012 (0.260 ± 0.021 mg/kg d.w.). During all years except 1991, a significant correlation was found between mercury content and the amount of organic matter in the sediments (r = 0.54-0.87, p < 0.01), flow velocity (r = 0.38-0.53, p < 0.01), and the rate of sedimentation in the reservoir (r = − 0.51 to − 0.69, p < 0.01). Calculations based on these results and previously published data from the study region on the density of atmospheric mercury precipitation showed that the watershed as a whole received 2.4-3.0 t on an annual basis, and in the same period, the water surface received 9.7-12.8 kg of mercury. The bottom sediment contained 4.31 (2012)-7.40 (1977) tons of mercury. Thus, most of the mercury in the Uglich Reservoir is assumed to originate from runoff and terrigenous sources within the watershed.
Environmental Earth Sciences, 2018
The total mercury content of the surface layer (0-5 cm) of different types of bottom sediment in ... more The total mercury content of the surface layer (0-5 cm) of different types of bottom sediment in Gorky and Cheboksary reservoirs was determined. The content of mercury in bottom sediments varied within a wide range, 0.001-0.234 mg/kg. In spite of large industrial enterprises near the watersheds, which are potential sources of mercury in the environment, the content is comparable to background values. Depending on the sediment type, the metal concentration rises within a sequence: sand and loamy sand > sandy loams > clay and silt. The content of mercury positively correlates with the amount of organic matter in bottom sediments (r = 0.49-0.86, p ≤ 0.001) and the proportion of clay silt particles (r = 0.55-0.76, p ≤ 0.001). This relationship indicates the presence of two forms of mercury: sorbed on fine particle surfaces and as part of complex compounds. A negative correlation between Hg concentration and the flow velocity in the reservoir was revealed (r = − 0.40 to − 0.58, p ≤ 0.05). This relationship is due to the effect of pulsating discharge and wind currents on sedimentation conditions, and thus on the accumulation of mercury. The rate of accumulation was calculated as 15 kg/year in Gorky reservoir and 9 kg/year in Cheboksary, with average concentrations of 0.057 and 0.046 mg/kg, respectively, in the surface layer of bottom sediments.
ЗДОРОВЬЕ НАСЕЛЕНИЯ И СРЕДА ОБИТАНИЯ - ЗНиСО / PUBLIC HEALTH AND LIFE ENVIRONMENT
Introduction: Mercury is considered by the World Health Organization as one of the top ten chemic... more Introduction: Mercury is considered by the World Health Organization as one of the top ten chemicals of major public health concern. Fish consumption is known to be the main source of exposure to mercury. It has been previously established that freshwater fish of the water bodies of the Vologda Region can be a significant source of mercury exposure in the local population. Objective: To establish the relationship between hair mercury concentrations in residents of the Vologda Region and diseases of the cardiovascular system. Materials and methods: The study involved 849 participants (274 men and 575 women) aged 18 to 94 years living in the city of Cherepovets (Vologda Region: 59° 07' N 37° 54' E). Occipital hair was sampled in accordance with WHO recommendations and then tested using the RA-915M mercury analyzer with a PYRO-915+ pyrolysis attachment (measurement range: 0.002–200 mg/kg) without preliminary sample preparation, by atomic absorption with Zeeman correction of non...
The content of total mercury in the hair of adolescent residents of the industrial center of Nort... more The content of total mercury in the hair of adolescent residents of the industrial center of North-West Russia varied from less than 0.002 to 0.83 mg/kg. The content of total mercury in the hair of males is 1.5-2 times lower than that of females. The relationship between the body mass index of females and the content of total mercury in the hair (for the entire observation period rs=0.28–0.48, at p < 0.05) was observed. It was found that the concentration of metal in the hair of the study participants depended on the frequency of fish consumption. Over a three-year observation period, an increase in the indicator values of the concentration of total mercury in the hair was recorded among 70% of the study participants, on average by 0.03 mg/kg per year. Indicators of the content of total mercury in the hair of females and males in the city of Cherepovets did not exceed the standard values established in Russia and in the world. At the same time, the recorded values of the annual i...
Limnology and Freshwater Biology
. In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Acad... more . In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academy of Sciences have been studying mercury concentrations in the muscles of fish from water bodies situated in different natural and climatic zones. Overall, more than 5000 fish samples from 102 lakes and 35 rivers in Russia were analysed. In the absence of local sources of mercury entering the water body, its concentrations in the fish muscles varied in wide ranges, exceeding two orders of magnitude. Minimum concentration (<0.03 mg/kg wet weight) was recorded in the muscles of omul, rotan (Chinese sleeper), minnow, and bleak (Lake Baikal, Transbaikalia and European Russia). Maximum mercury concentration (2-3 mg/kg wet weight) was recorded in the muscles of perches from lakes in the northwest of Russia (Vologda and Novgorod regions, Karelia). Most of the measurement results ranged from 0.05 to 0.30 mg/kg wet weight. Differences in mercury concentrations in the muscles of fish of the same species, similar in size and from one water body, as a rule, did not exceed ranges of one order of magnitude. In the absence of local mercury sources, mercury concentrations in fish muscles from closely spaced water bodies could have more than tenfold differences.
Limnology and Freshwater Biology, 2022
In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academ... more In recent decades, researchers from Papanin Institute for Biology of Inland Waters Russian Academy of Sciences have been studying mercury concentrations in the muscles of fish from water bodies situated in different natural and climatic zones. Overall, more than 5000 fish samples from 102 lakes and 35 rivers in Russia were analysed. In the absence of local sources of mercury entering the water body, its concentrations in the fish muscles varied in wide ranges, exceeding two orders of magnitude. Minimum concentration (<0.03 mg/kg wet weight) was recorded in the muscles of omul, rotan (Chinese sleeper), minnow, and bleak (Lake Baikal, Transbaikalia and European Russia). Maximum mercury concentration (2-3 mg/kg wet weight) was recorded in the muscles of perches from lakes in the northwest of Russia (Vologda and Novgorod regions, Karelia). Most of the measurement results ranged from 0.05 to 0.30 mg/kg wet weight. Differences in mercury concentrations in the muscles of fish of the same species, similar in size and from one water body, as a rule, did not exceed ranges of one order of magnitude. In the absence of local mercury sources, mercury concentrations in fish muscles from closely spaced water bodies could have more than tenfold differences.
Труды - Институт биологии внутренних вод, Dec 20, 2022
Поступила в редакцию 16.09.2022 Ртуть (Hg) и ее соединения, представляющие риск для здоровья насе... more Поступила в редакцию 16.09.2022 Ртуть (Hg) и ее соединения, представляющие риск для здоровья населения, не занятого на вредных производствах, поступают в организм человека преимущественно с продуктами питания. В первую очередь это морепродукты, рыба и рыбные консервы. В настоящем исследовании были определены концентрации Hg в мышцах представителей разных видов рыб из водоемов Ярославской области. Средние значения содержания ртути варьируют в интервале 0.03-0.41 мг/кг сырой массы. Зарегистрированные уровни накопления металла соответствуют или близки к ранее установленным величинам в мышцах рыб из пресноводных водоемов европейской части России и европейских государств. Отмечена видоспецифичность процесса накопления Hg, зависимость от трофической специализации и размерно-весовых характеристик рыб, типа водоема. Установленные в РФ нормативы по содержанию металла в мышцах мирных (<0.3 мг/кг сырой) и хищных видов рыб (<0.6 мг/кг) превышены у 0.3 и 16% исследованных мирных и хищных рыб, соответственно. Больше всего представителей хищных видов рыб с концентрациями Hg в мышцах, превышающими принятые нормативы, зарегистрировано в малых озерах с заболоченными водосборными бассейнами, меньше-в водохранилищах, редко-в средних по площади водного зеркала озерах. Пределы допустимого содержания ртути в рыбе и рыбной продукции, установленные в РФ, соответствуют или близки к действующим нормативам, принятым в странах Европейского сообщества, США и рекомендациям ВОЗ, хотя детализации регламента по возрастным группам и группам риска не существует.
Transactions of Papanin Institute for Biology of Inland Waters RAS, Dec 20, 2022
Soil invertebrates are the main food resource for birds and small mammals. The migration of mercu... more Soil invertebrates are the main food resource for birds and small mammals. The migration of mercury into the food webs of terrestrial ecosystems is still poorly investigated. The mercury content in soil, earthworms, wolf spiders and harvesters of the forest park zone of Cherepovets (Vologda region) was determined. The collection
of the material was carried out on 5 sites (birch-aspen forest, wet pine forest, dry pine forest, wet meadow, dry meadow) differing in the composition of vegetation and the position in the cascade of geochemical landscapes. The minimum mercury content was found in the soils of the dry meadow (eluvial landscape) – 25 ng/g, the maximum – in the soils of the wet meadow (accumulative landscape) – 188 ng/g. The maximum concentrations of mercury in all sites were found in earthworms – from 261 ng/g in the dry pine forest to 1095 ng/g in the wet meadow. The concentration of mercury in wolf spiders was lower than in earthworms. The minimum values were found in a dry meadow. In all sites, the mercury content in wolf spiders was significantly higher than
in harvesters. There are no significant correlations between the mercury content in soils and the organism of the studied invertebrates.
Sanitarnyj vrač, Feb 27, 2022
The mercury content in the muscle tissue of roach and perch from the reservoirs of the Vologda re... more The mercury content in the muscle tissue of roach and perch from the reservoirs of the Vologda region of the Russian Federation varies from 0,001 to 1,57 mg/kg of raw mass. Using the recommendations of the FAO/WHO, the safe amount of local fish in the diet of the population of the Vologda region is calculated: for adults — 309–1989 kg/week, depending on the type; for children — 83–525 g per week, depending on the type of fish and the age of the child. Using the recommendations of the US EPA, the safe amount of local fish in the diet of the population of the Vologda region is calculated: for adults— 182–350 kg/week, depending on the type; for children— 42–129 g per week, depending on the type of fish and the age of the child. The number of predatory fish in the diet of the population should be two times less than peaceful fish. It was found that the mercury content exceeds the normative levels in place in the Russian Federation (≥ 0,3 μg/g and ≥ 0,6 μg/g, respectively) in 6 % of the fish from non-predatory species and 8 % from predatory fish species. For children of school and preschool age, the proportion of perch that is recommended to be excluded from consumption is 60 and 51 %, respectively; the share of roach is 32 and 18 %, respectively. For the health of the adult population, it may be unsafe to eat more than 30 % of the studied perch and 4 % of the studied roach. English version of the article is available at URL: https://panor.ru/articles/calculation-of-mercury-intake-from-the-consumption-of-wild-fish-by-the-population-of-the-vologda-region/80552.html
The biodiversity of the Selenga river basin and the receiving waters of the lake Baikal, are amon... more The biodiversity of the Selenga river basin and the receiving waters of the lake Baikal, are among the greatest in the world with over 1,700 known endemic species of plants and animals. Mining activities along the Selenga river and its tributaries pose a major threat of chemical contamination, potentially reducing habitat quality and suitability for aquatic species. Moreover, the Selenga river serves as a major water source for the lake Baikal. Little information exists on the chemical contaminant concentrations in the Selenga river basin. Thus, the objectives of our study were to evaluate the concentrations of metals in soil, sediment, and fish in the Selenga. The concentrations of the metals were then compared to thresholds for toxicity to aquatic organisms. We sampled at 16 locations in the Tuul, Selbe, Khangal, Boro, Orkhon, and Selenge rivers in Mongolia in 2010. Concentrations of copper, chromium, nickel, lead and mercury were above predicted thresholds for toxicity at selecte...
International Archives of Occupational and Environmental Health, 2021
The purpose of this work is to study mercury levels in the hair of different social and demograph... more The purpose of this work is to study mercury levels in the hair of different social and demographic groups of the population of the Vologda region in Northwest Russia. This region is selected due to a heterogeneous distribution of rivers and lakes—a resource base for fishing. The mercury content was determined in the hair from the root with a length of about 2 cm. The concentration of total mercury in human hair was determined by the atomic absorption method without preliminary sample preparation using an RA-915M mercury analyzer and a PYRO-915 + pyrolysis unit. The average level of mercury in the human hair was 0.445 μg/g (median 0.220 μg/g). The concentration of mercury in the hair of people older than 44 years (0.875 μg/g) was three times higher than in the hair of children under 18 years of age (0.270 μg/g). People who eat fish less than once per month had a hair mercury concentration of 0.172 μg/g, for 1–2 times a month 0.409 μg/g, once a week 0.555 μg/g, and several times a week 0.995 μg/g. The concentration of mercury in the hair of smokers (0.514 μg/g) was higher than in the hair of non-smokers (0.426 μg/g). Significantly higher concentrations of mercury were observed in the hair of participants from the western part of the region, where reservoirs are the main commercial sources of fish products. The data showed that the main source of people’s mercury intake was fish.
Heliyon, 2020
The main aim of this study was to assess the level of mercury accumulation in the hair of student... more The main aim of this study was to assess the level of mercury accumulation in the hair of students studying in the Vologda Region, Russia. Particular attention is devoted to clarifying the relationship between the metal concentration in the hair and the amount of fish in the diet. It was found that the mercury content in the hair of Vologda Region residents aged 17-21 is in the range from less than 0.002 mg/kg to 1.69 mg/kg, the median of the indicator for the entire sample is 0.14 mg/kg. The median value of mercury content in the hair of males (0.12 mg/ kg) is lower than in the hair of females (0.16 mg/kg). The lowest metal concentrations were observed in individuals living in the city of Cherepovets and the highest metal concentration among the entire sample and in females in the western areas, and males in the eastern areas of the Vologda Region. The concentration of metal in the hair of the urban population is lower than in subjects living in rural areas. A higher metal content in the hair was recorded in individuals whose diet usually contains fish twice a month.
Samara Journal of Science, 2018
Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemica... more Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemicals. The content of mercury in the coat was 136 cats and 113 dogs in the territory of the Vologda Region in Cherepovets. The total mercury concentration in the wool samples was measured on a mercury analyzer RA-915 +. The values of the mercury index in cats range from less than 0,001 mg / kg to 13,00 mg / kg, in dogs from less than 0,001 mg / kg to 1,858 mg / kg. Statistical difference in the content of mercury in wool between cats and dogs was revealed. The Hg content in cats is 3,5 times higher than the dogs have. Comparison analysis showed the concentration of mercury in the wool of cats and dogs have no statistically significant differences. The authors noted that cats had 4 times more mercury who ate fish. The average content of Hg in the wool of dogs is slightly different for those who ate fish.
Ecosystem Transformation, 2019
Проведено исследование содержания ртути (Hg) в мышечной ткани речного окуня (Perca fluviatilis Li... more Проведено исследование содержания ртути (Hg) в мышечной ткани речного окуня (Perca fluviatilis Linnaeus, 1758) из разных плесов Рыбинского водохранилища в период с 1997 по 2012 г. Концентрации Hg в мышцах были выше у окуня из Шекснинского и Волжского плесов, ниже-из Главного и Моложского, так же, как и Hg в донных отложениях из мест обитания рыб. Отмечена зависимость значения показателя от размеров рыб и тенденция к его увеличению в последние десятилетия. Определено содержание ртути в различных органах и тканях окуня. Установлена положительная корреляционная зависимость между значениями показателя во всех исследованных образцах с концентрацией металла в мышечной ткани, в которой она была самой высокой (до 0.91 мг/кг сырой массы). Основная доля аккумулированной рыбой ртути приходится на мышцы.
Ecosystem Transformation, 2019
The influence of forest fire on the gross mercury content in soddy podburs formed in typical fore... more The influence of forest fire on the gross mercury content in soddy podburs formed in typical foreststeppe conditions is studied. The metal concentration in the soils of the control area not affected by the fire is 0.063 ± 0.045 mg/kg at a depth of 0-10 cm, compared to 0.041 ± 0.008 mg/kg in soils of the burnt forest area. The relationship between the content of organic carbon and the amount of mercury in the top 20 cm of the soil profile of burnt areas has not been established (r = 0.26; p = 0.19). In the soils of the control plot, on the contrary, these indicators showed a significant positive correlation (r = 0.74; p ≤ 0.05). The estimated amount of mercury released from the soil during a fire is 3 mg/m 2. The area of forest affected by fires in 2010 in the Voronezh Region was 15,910 ha. Thus, the amount of mercury released into the atmosphere as a result of the combustion of the upper soil layer is estimated at 477.3 kg.
Environmental Monitoring and Assessment, 2018
The long-term dynamics of mercury in bottom sediments of Uglich Reservoir were examined. Samples ... more The long-term dynamics of mercury in bottom sediments of Uglich Reservoir were examined. Samples of the 0-5-cm surface layer of bottom sediment collected during research expeditions in 1958, 1977, 1991, and 2012 were analyzed. An increase in the average mercury concentration from 1958 to 1977 (0.440 ± 0.039 and 0.668 ± 0.065 mg/kg d.w., respectively) was followed by a decrease in 2012 (0.260 ± 0.021 mg/kg d.w.). During all years except 1991, a significant correlation was found between mercury content and the amount of organic matter in the sediments (r = 0.54-0.87, p < 0.01), flow velocity (r = 0.38-0.53, p < 0.01), and the rate of sedimentation in the reservoir (r = − 0.51 to − 0.69, p < 0.01). Calculations based on these results and previously published data from the study region on the density of atmospheric mercury precipitation showed that the watershed as a whole received 2.4-3.0 t on an annual basis, and in the same period, the water surface received 9.7-12.8 kg of mercury. The bottom sediment contained 4.31 (2012)-7.40 (1977) tons of mercury. Thus, most of the mercury in the Uglich Reservoir is assumed to originate from runoff and terrigenous sources within the watershed.
Environmental Earth Sciences, 2018
The total mercury content of the surface layer (0-5 cm) of different types of bottom sediment in ... more The total mercury content of the surface layer (0-5 cm) of different types of bottom sediment in Gorky and Cheboksary reservoirs was determined. The content of mercury in bottom sediments varied within a wide range, 0.001-0.234 mg/kg. In spite of large industrial enterprises near the watersheds, which are potential sources of mercury in the environment, the content is comparable to background values. Depending on the sediment type, the metal concentration rises within a sequence: sand and loamy sand > sandy loams > clay and silt. The content of mercury positively correlates with the amount of organic matter in bottom sediments (r = 0.49-0.86, p ≤ 0.001) and the proportion of clay silt particles (r = 0.55-0.76, p ≤ 0.001). This relationship indicates the presence of two forms of mercury: sorbed on fine particle surfaces and as part of complex compounds. A negative correlation between Hg concentration and the flow velocity in the reservoir was revealed (r = − 0.40 to − 0.58, p ≤ 0.05). This relationship is due to the effect of pulsating discharge and wind currents on sedimentation conditions, and thus on the accumulation of mercury. The rate of accumulation was calculated as 15 kg/year in Gorky reservoir and 9 kg/year in Cheboksary, with average concentrations of 0.057 and 0.046 mg/kg, respectively, in the surface layer of bottom sediments.