ISSN 1995-4301(Print)
ISSN 2618-8406
(Online)
Current issues:
Online version of the journal
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Select viewing optionsPhotocatalytic degradation of azo dyes in aqueous solution by using highly ordered titania nanotube films |
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| A.N. Morozov, Z.P. Thant, I.A. Pochitalkina | ||||
| Section: Ecologization of industry |
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| The heterogeneous process of photocatalytic degradation of azorubine in aqueous medium on coatings of highly ordered TiO2 nanotube (NT) matrix was studied. The photoactive coatings consist of TiO2 NTs with an inner diameter of 115±10 nm, a wall thickness of 10±2 nm, and a length of 17.2±1.1 µm. Using X-ray diffraction, it was shown that the studied TiO2 coatings have a nanosized polycrystalline anatase structure. It was found that the saturation of the nanotube coating with substrate played the key role in determining the rate of the photocatalytic process. The degree of saturation itself can be determined either by the intensity of mass transfer or by the surface area of the photocatalyst. Using electron spectroscopy, it was shown that the process of photocatalytic oxidation of azorubine on the surface of TiO2 NTs occurs without desorption of intermediate organic compounds into the reaction volume. Based on the obtained results, recommendations for the water purification application of TiO2 NT films as photoactive coatings in microchannel systems were formulated. | ||||
| Keywords: titanium dioxide, photocatalysis, nanotubes, azorubine, degradation |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-111-118 |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-065-071 |
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Evaluating perspectives for the forming an eco-industrial park in the Nizhnekamsk industrial hub |
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| I.O. Tikhonova, E.M. Danilova, V.A. Maryev, E.M. Averochkin | ||||
| Section: Methodology and research methods. Models and forecasts |
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| Various types of industrial wastes formed in the Nizhnekamsk industrial hub are considered. Requirements to the development of eco-industrial parks are discussed, and a typical scheme for making decisions concerning setting such parks is suggested. Two types of wastes characteristic for the considered industrial hub are identified, namely: low-tonnage (less than 500 tons per year) and large-tonnage (over 500 tons per year). While assessing qualitative characteristics of waste formation, alternative waste management ways are recognized. The priority attention is paid to petroleum-containing wastes, wastes of rubber technical goods and tires, as well as spent oil wastes. Options for waste processing are considered – of both secondary energy resources and secondary material resources, which are preferable for a circular economy. The following methods of waste processing have been selected: pyrolysis for petroleum-containing wastes; production of rubber crumb and bitumen-rubber composition – for wastes of rubber technical goods and tires; production of refined technical oils for spent oil wastes. Based on the results of the consolidated financial assessment, authors suggest the most feasible solution, namely: the technological scheme with the production of 3 products – rubber crumb, bitumenrubber composition and refined technical oils. It is evident, that at the initial stage, this solution requires investment in capital equipment. The least expensive is the technological scheme with obtaining only purified oil, when other wastes are pyrolyzed. Although this scheme is expected to be less profitable, the authors believe that this scheme should be se | ||||
| Keywords: eco-industrial park, secondary resources, industrial waste, recycling, circular economy, utilization, pyrolysis |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-045-051 |
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Recycling of waste from primary chemical power sources |
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| S.L. Fuchs, S.V. Devyaterikova | ||||
| Section: Ecologization of industry |
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| Nowadays, due to a great quantity of spent chemical sources of electric energy (batteries) (up to 0.25% of total waste in big cities), the issue of their recycling is very topical. Batteries are not to be utilized with solid household waste, as after destruction of battery cases in conditions of high humidity in solid waste refuse dumps, alkali and heavy metals get into the environment. Toxic substances get into soil and then into ground water and into water bodies. Besides, if solid waste dumps get burned, batteries emit dioxins into the atmosphere. Nevertheless, a spent chemical source of electric energy is a concentration of metals which could and should be recycled. The residue after metal winning (spent slurry) is also to be properly recycled. The paper offers the conditions of recycling primary zinc-manganese chemical sources of electric energy. We crushed spent chemical sources of electric energy, then we divided their components into metal (a steel case, a zinc current lead) and non-metal ones (active mass). From the active mass we extricated hydroxides and salts of ferrum, zinc, and manganese, and the residual matter was dried in а drying oven till it had a fixed weight. In active mass powder, the residue after extracting metals, we stated the particles’ morphology and element composition using a scanning electron microscope with an internal energy-dispersive analysis sensor. After heat treatment at 250–300 оС and fractionating, active mass powder was used in composites on the basis of high-pressure polyethylene. With the ratio of high-pressure polyethylene and active mass equal to 2.75 : 1, we got a high hardness composite. The average value of the microhardness of the composite is almost 2 times higher than that of the reference materials, and is 70.99±0.04 kg/mm2. | ||||
| Keywords: chemical sources of electric energy, utilization of chemical current sources, active mass |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-119-123 |
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Melanin-containing micromycetes in soils and organic waste |
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| V.A. Terekhova, E.V. Fedoseeva, V.D. Volkova, А.E. Ivanova, O.S. Yakimenko | ||||
| Section: Population ecology |
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| Melanin formation in fungi used to indicate chemical and radiation contamination of soils depends on the composition of the environment and nutritional conditions. The relevance of this study is due to the assessment of the indicator significance of melanin-containing fungi under different conditions. The structure of mycobiota was studied in technosoil samples from organic composted wastes and in natural soils differing in the content of heavy metals (HMs) and available sources of carbon nutrition (Corg.). The total number of micromycetes, diversity, and representation of melanin-containing fungi were assessed by inoculation method and using high-throughput genome sequencing. Both methods showed an increase in the number of colony-forming units (CFU) of melanin-containing fungi with an increase in the load of HMs in samples of soddy-podzolic soils. However, the traditional inoculation method also revealed a noticeable effect of the content of Corg. on the increase in melanized forms in the formed mycobiota of soils with HMs. Thus, in slightly humus soil (Сorg. = 1.3%), the introduction of HMs led to an increase in the number of CFU for melanized forms by 38%, in highly humus soil (Сorg. = 3.9) only by 18%. The obtained data confirm the proposition that in substrates depleted of carbohydrate nutrition, melanin formation contributes to an increase in resistance to redox stress. In the techno-soil from composted waste, despite the significant content of HMs, in particular, cadmium, the proportion of melanized fungi is small, which is probably due to the immaturity of fungal communities in the waste. A conclusion was made about the greater bioindicative informativeness of the microbiological inoculation method before expensive metagenomic sequencing, and the effectiveness of its use in environmental monitoring of soil pollution. | ||||
| Keywords: mycoindication, melanin, chemical pollution, soil, technosoil, organic carbon, cultivated micromycetes, metagenomic analysis |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-204-213 |
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A conceptual approach to diagnosing the ecological and economic security of the region |
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| E.V. Karanina, V.M. Karaulov, K.E. Кartavykh | ||||
| Section: Social ecology |
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| The article deals with the problems of the regions from the standpoint of the concept of environmental and economic security. The concept and essence of ecological and economic security is disclosed, including from the standpoint of the ecosystem. In particular, the balanced functioning of the regional ecosystem implies the preservation of biological diversity and ecological balance, at least the intensity of the impact of the regional ecosystem on the natural ecosystem should not increase. A methodology for assessing such an impact based on the index of environmental well-being and the results of its testing in the subjects of the Volga Federal District in 2010-2020 are proposed. On the example of the Kirov region, an analysis of the costs of environmental protection measures, the dynamics of investments in fixed assets aimed at protecting the environment and rational use of the region’s natural resources is presented. The volume and structure of receipts of payments for the use of natural resources are determined. From the point of view of the ecological and economic security of the region, the aspect of taxation, which takes into account the negative impact on the environment, is considered. The necessity of forming a unified state policy aimed at preventing internal and external threats to environmental and economic security is substantiated. The article also proves the importance of forming an environmental and economic strategy approved at the legislative level, which will become a tool for achieving sustainable development of Russian regions. | ||||
| Keywords: environmental and economic security, ecosystem of the region, natural resources, environmental protection costs, man-made pollution, index of environmental well-being |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-214-223 |
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Effects of polystyrene microplastic particles on the morphological and functional parameters of Daphnia magna |
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| O.V. Nikitin, E.I. Nasyrova, R.S. Kuzmin, L.M. Minnegulova, V.Z. Latypova, T.Ya. Ashikhmina | ||||
| Section: Ecotoxicology |
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| Based on the results of laboratory modeling, the article evaluates the biological impact of microplastics on freshwater organisms using the example of the effect of polystyrene microparticles on the morphological and functional parameters (survival rate, size characteristics, locomotor and trophic activity) of freshwater crustaceans Daphnia magna Straus. The studied particles of polystyrene microplastics had homogeneous fractional composition in the experiments: < 10 µm (≈ 5%), < 50 µm (≈ 40%) and < 100 µm (≈ 75%). The median lethal concentration LC50 for polystyrene microparticles, determined in an acute toxicological experiment, was 197.35 mg/L (95% confidence interval: 163.10–259.98 mg/L). At 48 h of exposure in the entire range of the studied concentrations of microplastics (0 (control), 10, 50, 125 and 200 mg/L), no effect on the morphometric parameters of D. magna was found, the average size of individuals was 1.75±0.01 mm. After 24 h of exposure, the swimming speed of D. magna was maximal under control conditions (mean 0.87±0.10 cm/s). The addition of polystyrene microparticles into the medium at concentrations of 50, 125, and 200 mg/L significantly reduced (by about 44%) the swimming speed. The trophic activity of D. magna, estimated by the chlorophyll fluorescence of the alga Chlorella vulgaris Beijerinck and amounting to 96% under control conditions, decreased when microplastics were added to the medium, reaching 19% at the maximum concentration of microplastics (200 mg/L). It has been shown by microscopy that Chlorella cells that fill the gut of Daphnia under control conditions are replaced mainly by polystyrene particles when microplastics are added to the algae suspension at a concentration of 200 mg/L. The results obtained indicate the impact of polystyrene microplastic particles on freshwater organisms. | ||||
| Keywords: microplastics, polystyrene, Daphnia magna, Chlorella vulgaris, toxicity, swimming speed, trophic activity, morphometric parameters |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-196-203 |
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Integral assessment of river sediments technogenic contamination within Eastern Donbass coal-mining area |
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| V.N. Reshetnyak, V.E. Zakrutkin, E.V. Gibkov | ||||
| Section: Chemistry of natural environments and objects |
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| Long-term coal mining and processing as well as the impact of coal mining facilities on environmental components within the Eastern Donbass have led to a number of hydroecological problems, which have been intensified by the liquidation of coal mines. Based on the analysis of conventional methods and approaches the main principles of the integral assessment of the river sediments contamination level have been formulated, the integral contamination index of river sediments has been proposed and criteria for assessing the river sediments contamination level have been developed. For testing the proposed approach the calculation and assessment of the levels of sediments contamination in the rivers of the coal-mining area of the Eastern Donbass (Rostov region, Russia) has been carried out. The results of the assessment obtained using the integral contamination index of river sediments are compared with the results obtained using conventional indices and indicators. The integral contamination index of river sediments proposed by the authors includes the element hazard coefficients for aquatic ecosystems and the pelitic fraction share. This allows us to reflect not only the level of pollutant accumulation in sediments, but also to consider the risk of secondary water pollution with the sediments material. In general, river sediments in the most part of the river sections within the Eastern Donbass can be classified as moderately polluted. The high level of river sediments contamination in some sections of the rivers still remains due to a higher technogenic load. Thus, the integral contamination index of river sediments allows researchers to correctly assess the level of river sediments pollution within technogenically disturbed areas. | ||||
| Keywords: river sediments, coal-mining areas, integral contamination index of river sediments, secondary water pollution |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-080-087 |
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Structural and surface and acid-base properties of thermal power plant ash and slag |
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| D.V. Mayorov, T.T. Gorbacheva | ||||
| Section: Ecologization of industry |
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| The ash slags formed at thermal power plants operating in the industrially developed northern region of the Russian Federation (Murmansk region) were investigated with the methods of BET (S. Brunauer, T. Emmett, and E. Teller) and BJH (Barrett-Joyner-Highland). It was found that the material has a predominantly mesoporous structure with a pore volume in the diameter range of 1.7–300 nm equal to 0.051 cm3/g and a specific surface area of 17.8 m2/g, which corresponds to the maximum levels observed at European thermal power plants of average power. It is established that the studied ash slag samples are characterized by a bimodal distribution of particles with a predominance of a fraction of 40–64 micrometers. It is shown that by its physico-chemical and structural-surface properties, the ash-slag mixture belongs to type F according to the international classification ASTM C 618, according to which it can be recommended for direct use as a sorbent in the treatment of domestic wastewater, and the pH value of the iso-ion point (7.63) indicates a predominant sorption of cationic forms of biogenic elements on the studied sample. | ||||
| Keywords: ash and slag mix, thermal power plant, structural and surface properties, acid-base properties, sorption |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-104-110 |
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Influence of radioecological pollution on heart rate variability in young men of different somatotypes |
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| O.V. Kalabin, F.B. Litvin, T.M. Bruk, I.V. Bykova, E.V. Udovenko | ||||
| Section: Social ecology |
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| Monitoring of the influence of radioactive contamination as a result of the accident at the Chernobyl nuclear power plant was carried out using morphophysiological and statistical research methods. The sources of the data are our own research, the data of Bryanskstat, Rostekhnadzor, Rospotrebnadzor. Groups of normosthenics, asthenics and hypersthenics were raced and identified among young men permanently residing in the areas with different levels of radioactive contamination. Different frequency of somatotypes occurrence, depending on the area of residence, was stated. Normally clean territories are dominated by normosthenics. In the areas with an increased level of radioactive contamination the number of asthenics and hypersthenics is growing. As for normostenics, moderate autonomic and moderate central mechanisms of heart rate regulation dominate. Asthenics are characterized by increase in the pronounced central mechanism of regulation. As for hypersthenics, the influence of a pronounced autonomous mechanism of regulation of the heart rate prevails. The pronounced dominance of the central circuit of heart rate regulation in asthenics and the autonomous circuit of heart rate regulation in hypersthenics is a consequence of tension, and in some representatives of depletion of the reserve capabilities of the systems under study in conditions of prolonged exposure to low doses of radiation. The identified variants of autonomic regulation of the heart rate are largely genetically determined, but at the same time, they are finally formed under the influence of external (radiation load on the environment) and internal (constitutional) factors. The data obtained make it possible to identify groups of persons susceptible to maladjustment phenomena and to use the heart rate variability results for physical rehabilitation of young people in extreme living conditions. | ||||
| Keywords: age, radiation, somatotype, heart rate, type of regulation |
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| Article published in number 4 for 2022 DOI: 10.25750/1995-4301-2022-4-232-239 |
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36, Moskovskya street, Kirov, 610000, Editorial Board "Theoretical and Applied Ecology." Phone/fax: (8332) 37-02-77 e-mail: envjournal@vyatsu.ru The journal was founded in 2007 |
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