Extraction of copper and zinc ions from wastewater by a sorbent based on chitosan
E.A. Tatarintseva, O.A. Arefieva, L.N. Olshanskaya, A.A. Petrov, F. Bugerara
Section: Ecologization of industry
The aim of this work was to obtain sorption magnetic materials based on ferritized galvanic sludge, thermally expanded graphene oxide, and chitosan for the removal of heavy metal ions (Cu2+, Zn2+) from aqueous media. Thermally expanded graphene oxide was obtained by electrochemical oxidation of graphite followed by hydrolysis and heat treatment at 900 оС. Ferritized iron-containing galvanic sludge was obtained by deposition by successive acid-base treatment from an aqueous suspension of galvanic sludge followed by heat treatment at 900 оС for 1.5 h. Methods for forming a magnetic composite sorbent by introducing ferritized galvanic sludge simultaneously with thermally expanded graphene oxide are considered. The resulting sorbent has the form of grains with a particle size of 2–3 mm, which have magnetic properties (≈ 0.02 T). The composition of the resulting sorption material is characterized using the IR spectroscopy method. Functional groups (primary amino and hydroxyl groups), that are capable of coordinating with various metal ions or participating in ion exchange have been determined. Studies of sorption with respect to zinc and copper(II) ions were carried out under static conditions during their extraction from model wastewater solutions. The maximum sorption capacity of the sorbent for Cu2+ ions was 6.9±0.1 mmol/g, for Zn2+ ions – 2.6±0.01 mmol/g. Sorption isotherms of Cu2+ and Zn2+ ions by the developed sorption material belong to type I according to the IUPAC classification, which is compiled on the basis of the classical classification of adsorption–desorption isotherms of Brunauer, Deming, Deming and Teller (BDDT classification), this type is typical for adsorption with the formation of a monolayer on a porous solid body.
Keywords: sorbents, water treatment, heavy metal ions, graphene oxide, magnetosorbents, industrial waste
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-148-153
Views: 30
Influence of industrial emissions from heat power engineering enterprises on the absorption of solar radiation in the atmosphere
V.A. Kuzmin, I.A. Zagrai, N.A. Shmakova
Section: Ecology and climate change
The paper evaluates the effect of emissions from heat power engineering enterprises on the absorption of radiation in the atmosphere through the calculation of absorption coefficients and absorption functions of combustion products during flaring of solid fuels (coal and peat) in the furnace of BKZ-210-140F steam boiler. The chemical composition of the gas phase and condensed phase particles were used to calculate the absorption coefficients at a temperature of 300 K and the spectral range of 0.4–14 μm, as well as the absorption functions at layer thicknesses of 5 and 10 m. The presence of ash particles makes a significant contribution to the absorption of solar radiation by combustion products in the transparency windows of the gas phase.In the absence of a flue gas purification system for the optical range (0.4–0.78 μm), absorption can be up to 20% during flaring of coal and up to 46% during flaring of peat. For the atmospheric transparency window of 7.5–14 μm, the absorption function of combustion products takes values from 73 to 100% during flaring of coal and from 64 to 100% during flaring of peat. The largest optical thickness in terms of the absorption coefficients of gas phase is accounted for the components H2O and CO2, which make the main contribution to the creation of the greenhouse effect.
Keywords: atmosphere, greenhouse effect, flaring of coal and peat, combustion products, gas phase, ash particles, absorption coefficient, absorption function
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-170-178
Views: 28
Environmental protection during mining in the Arctic: legal aspects
Р.P. Battakhov
Section: Social ecology
The article discusses the main aspects of environmental protection and legal regulation of mining operations in the Russian Arctic regions, as required by Russian legislation and international conventions. The work highlights the distinctive legal, economic and environmental aspects of the Arctic region. Moreover, it points out that the minerals and raw materials base of the Arctic is the foundation of the Russian economy. The author focused on issues within the Constitution of the Russian Federation, that officially authorizes ownership of the subsoil. It is found that extractive industries often cause damage to the Arctic environment. Major environmental disasters, their consequences and possible measures to prevent them were also analyzed. For example, the criterion of proportionality in the extraction of
natural resources, preventive measures, environmental monitoring, improvement of the legal framework, etc. And the special role of the increasing number of environmental disasters is also mentioned. We propose that property liability measures for extractive companies in violating environmental and economic requirements should be stricter. However, extractive commercial organizations must be granted a subsoil license in accordance with Federal Law No. 2395-I of 21 February 1992 “On Subsoil”. Accordingly, it is necessary to replace the auction with a tender-based bidding process in the above-mentioned law. The author has pointed out that an important element in the protection and conservation of the environment is the development of the activities of native minorities of the North as custodians of the Russian Arctic. It draws the conclusion stating the necessity of proposing the passage of a comprehensive law “On environmental protection in the extraction of mineral resources within the Arctic of the Russian Federation”, taking into account the existing international conventions and the Russian Constitution, its structure is defined.
Keywords: Arctic, license for the use of mineral resources, economic activity, subsoil, ecology, subjects
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-179-185
Views: 25
Accumulation of polyarenes in higher plants of hummock peatlands in the southern and northern tundra
E.V. Yakovleva, D.N. Gabov
Section: Chemistry of natural environments and objects
We studied the content of polycyclic aromatic hydrocarbons (PAHs) in plants of the background hummock peatlands in the southern (Vorkuta district, Komi Republic) and northern (Nenets Autonomous District) tundra. PAHs in plants were determined by high-performance liquid chromatography. We used ASE–350 Accelerated Solvent Extraction System (Dionex Corporation, USA) to extract PAHs from samples. Totally, 11 individual PAH structures were found in the plant samples studied. Low molecular weight PAHs were prevalent in all studied plants. The highest content of PAHs was found in plants at site 2, southern tundra; the lowest - at site 2 northern tundra. In the plants of the southern tundra, an increased content of 2-3-ring polyarenes was detected, that was possibly caused by long-distance transport from the Vorkuta industrial agglomeration. In plants from the Barents Sea coast, we revealed an increase in mass fraction of high molecular PAHs of biopedogenic origin, which were accumulated by plants from the peat waters. For sedges and cotton grasses, an increased content of benz[k]fluoranthene and benz[a]pyrene has been detected. This fact may be associated with the active root uptake of polyarenes characteristic of herbaceous plants. The results of the cluster analysis showed that the polyarenes content of the plants was determined both by their species composition and by the geographical location of the study sites. The clustering of different plant species from different sites indicates the background concentrations of PAHs, which are maintained by plants under natural conditions without anthropogenic impact. Based on these studies, background concentrations of PAHs in different species of peatland plants have been proposed, which can be used for monitoring PAH pollution in mire ecosystems of the north.
Section: Chemistry of natural environments and objects
Soils are the largest reservoir of organic carbon in terrestrial ecosystems. However, current estimates of pools of soil organic carbon (SOC) are characterized by the wide variations of obtained values. So, there is a requirement for upgrading of SOC calculation techniques. One of the ways is an evaluation of mean SOC for separate soil group or type of vegetation. The aim of this work is to determine mean SOC dependence on soil group and dominant tree species for forest ecosystems of Krasnoyarsk Region. Calculations were carried out for next layers of mineral soil: 0–30 cm (reference layer
FAO), 0–50 cm (root zone) and 0–100 cm (concentrates the most SOC of soil profile) that didn’t include carbon stocks in forest litter. Estimates of the mean SOC were made according to our own research data obtained near ZOTTO (Zotino Tall Tower Observatory) and the results of soil descriptions given in the literature for the forests of the Krasnoyarsk Region. Higher concentration of carbon (24±6 kg/m2) was observed in Phaeozems but Albic Podzols contained the lowest stock of SOC (6.2±0.7 kg/m2). It was found that belonging to a certain soil group had a statistically significant effect on carbon stocks in all analyzed layers. Most of the SOC is concentrated in the 0–50 cm layer, which contains the bulk of plant roots. The type of dominant tree species is not a statistically significant factor in determining SOC. The values we have calculated can be considered as the basis for creating a database for subsequent estimates of SOC in the forests of the Krasnoyarsk Region.
Keywords: soil carbon, boreal forests, Krasnoyarsk Region
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-067-074
Views: 28
Statistical analysis of the relationship between heavy metal accumulation and plants biochemical responses in the urban area
A.S. Petukhov, T.A. Kremleva, N.A. Khritokhin, G.A. Petukhova
Section: Chemistry of natural environments and objects
This study is devoted to heavy metal accumulation (Cu, Zn, Fe, Mn, Pb, Cd, Ni, Co, Cr) in soils and coltsfoot leaves
from the industrial area of Tyumen impact on biochemical parameters of plants. Regression and factor analysis were
conducted using data of heavy metal concentration in coltsfoot, heavy metals mobile and acid-soluble fraction in soils,
and biochemical parameters (concentration of photosynthetic pigments, lipid peroxidation products, phenols, flavonoids,
activity of catalase and peroxidase). Samples were collected during 2017–2020 in Tyumen at areas with different pollution level (n = 28). Regression analysis established equations linking photosynthetic pigments content with Cu, Fe, Mn, and Zn concentration in soils and coltsfoot. Phenolic antioxidants negatively correlate with Cu and Mn content in plants. Regression equations allow predicting Fe, Zn, and Cu concentration in coltsfoot by its content in the soil. Factor analysis revealed photosynthetic pigments to be the most important biochemical parameter in plants adaption to heavy
metal accumulation. Probably, this is due to plants’ elevated need in energy in polluted conditions. According to factor
analysis, Pb accumulation in plants contributes the most to the biochemical change. Cd and Pb concentration in soil
mostly conditions plants stress from heavy metal soil pollution.
Keywords: heavy metals, soils, plants, photosynthesis, antioxidants, urban area
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-083-092
Views: 35
Developing a system of environmental indicators reflecting the water management aspects of an enterprise in the light of sustainable development
S.A. Dvinskikh, O.V. Larchenko, M.A. Oskina
Section: Ecologization of industry
The negative consequences of the enterprise production activities in the current conditions have a significant destructive effect on the state of the environment, including water resources. In recent decades, the shortage of fresh water is increasing everywhere and occurs in regions where it has not existed before. The reason is the expansion of water consumption by both the population and the growing economy. There are two reasons for water scarcity. First, the decrease in the amount of water resources due to the consumption of water by industry, agriculture and people; indirect water losses as a result of deforestation, drainage of reservoirs and swamps. Secondly, water pollution, which is equivalent to the loss of fresh water reserves; in terms of volume, water pollution can significantly exceed the volume of water directly used in production and everyday life. We have proposed a method for assessing the water deficit based on the calculation of the integral index of water resources. It allows us to draw a conclusion about the contribution of the enterprise under study to the formation (or the absence of formation) of the water deficit of the territory. The index is the geometric mean of the two indicators. The wastewater discharge indicator characterizes the quality of water resources, and the water use
indicator characterizes their quantity. The limit values of the indicators and the integral index are equal to one, its excess indicates the occurrence of water shortage. The proposed methodology was used in assessing the possible occurrence of a quantitative and qualitative shortage of water resources in the territory of influence of a large mining enterprise located in the northeast of the Perm Krai. It has been established that the region under study is characterized by the absence of a water deficit in terms of the number of water resources even in extremely dry years. Specific water supply per 1 inhabitant is characterized as “average”. Its value will not decrease even with the planned increase in water intake for the needs of the enterprise for the period up to 2030. However, there is a shortage in the quality of water bodies. We’ve identified the wastewater outlets, which are characterized by an excess of the discharge indicator for all elements during the period under review. This requires taking measures to reduce the concentrations of pollutants in the discharged waters. The proposed integral indicator can be used when planning the activities of an enterprise in the light of sustainable development.
Keywords: sustainable development, enterprise, water resources, indicator, index, water management balance, water supply, wastewater, scarcity, water quality
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-140-147
Views: 25
Size-age and histomorphological indicators of the Arctic grayling (Thymallus arcticus) of Putorana Nature Reserve
I.S. Nekrasov, A.G. Selyukov
Section: Population ecology
In waterbodies of high latitudes, ichthyofauna of the boreal foothill complex is highly sensitive to unfavorable factors. Poorly studied and extremely vulnerable freshwater ecosystems of the Subarctic require an especially close attention, considering conditions of global climate changes and increasing anthropogenic impact. An important method of their protection is creation of Specially Protected Natural Areas (SPNA) with purpose of preserving natural ecosystems in their intact state. However, territories that are not subjects of anthropogenic influence are extremely rare presently. While studying the Arctic grayling (Thymallus arcticus) of the Irkinda River (the Putorana Plateau), flowing through the territory of Putorana Reserve, some histopathologies pointing on an unstable ecological situation in this region were revealed. The noted initial stages of pathological process in branchial apparatus, namely - hyperplasia, aneurysms, fusion of respiratory lamellae, and an increase of cells layers in intercalary epithelium - indicate suppression of respiratory function. The reproductive system is less affected, but abnormalities are also found in it. Resorption of vitellogenic oocytes was revealed in 83% of individuals. Moreover, all the males of the Arctic grayling took part in the past spawning, while the number of spawned females was not more than 67%.
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-117-124
Views: 14
Integral classification of air quality in European cities
V.S. Tikunov, S.K. Belousov
Section: Monitoring of natural and anthropogenically disturbed areas
The article presents a method of integral assessment of air quality in European. The approaches to the integrated assessment of air quality in Russia and other countries have a number of significant differences in the set of used indicators and in the methodology for obtaining its integral characteristics. The air pollution index (IZA) used in Russia is cumulative and includes hazardous pollutants with low absolute concentrations, while the Air Quality Index (AQI) widely used in Europe and the United States shows the quality of atmospheric air by the largest pollutant without considering the hazard classes of substances. This leads to weak compatibility of assessments made in Russia and those made in other countries. In the study, the Air Quality Index and the Index of Atmospheric Pollution were calculated, as well as their comparison was carried out for European cities. The results obtained using two approaches to the assessment make it possible to reduce shortcomings of indices and give a more detailed characterization of the air quality in cities. The research shows that multiparameter classification made by one of air quality indices perform weak, but using both indices at the same time significantly improve results. It is possible to make a relevant cities air quality classification by the main pollutants using both AQI and IZA. Cities in air quality classes form clear-cut clusters that strongly correlate with current economical zoning in Europe.
Keywords: integral indices, air quality, air quality index, multiparameter pollutant classification
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-047-055
Views: 29
To estimation of the probability of human primary incidence growth in the conditions of a natural biogeochemical province without endemic diseases
E.A. Malkova, E.V. Mikheeva, I.A. Kshnyasev
Section: Social ecology
The article is dedicated to the human population primary morbidity in the natural biogeochemical province with heavy metal abundance (nickel, cobalt, chromium). In the studied region the concentrations of chemical elements, which form province, do not reach the endemic diseases limits. To investigate a five-year period human morbidity, the retrospective method was used. To classify the studied diseases, the International Classification of Diseases of the tenth revision was applied.
The primary morbidity investigations were carried through three territories: nickel-cobalt-chromium natural
biogeochemical province, the Ekaterinburg megapolis, the biogeochemical background region, that are situated in the Sverdlovsk region of Russian Federation. The abnormal soil concentrations of heave metal are from natural ultrabasic rocks chemistry origin. For morbidity odds analysis the generalized linear model was used; and canonical correspondence analysis was used for the investigation of morbidity structure. Statistically significant differences in the structure of primary morbidity of three investigated territories were found. The maximum level of primary morbidity odds was found in the natural biogeochemical province.
The odds of the primary occurrence of the circulatory system diseases in the province are 3.44 times higher than in megapolis (Ekaterinburg) and 2.57 times higher than in a biogeochemical background with a similar age structure of the studied population. The respiratory diseases odds in the provinces are 1.49 and 1.85 times higher than in the Ekaterinburg and biogeochemical background respectively. The musculoskeletal system diseases risk in the biogeochemical province is 2.5 and 1.38 times higher than in the Ekaterinburg and biogeochemical background respectively.
The differences between the populations of the natural biogeochemical province, megapolis, and geochemical background territory are more significant than interannual primary morbidity fluctuations in the each studied population. This indicates a significant risk of non-endemic diseases caused by the natural geochemical factor.
ISSN 1995-4301
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