This article addresses a number of issues related to the environmental friendliness of motor vehicles. Modern trends in the transition of the market to electric vehicles, and the problem of recycling and recycling of electric vehicle elements are considered. It was revealed that the transition from cars from ICE to electric vehicles is not yet fully justified from the point of view of ecology.

Keywords: electric car, environmental safety, waste, battery, disposal, recycling

This article is devoted to the study of indoor air quality in a higher education institution: assessment of the distribution patterns of suspended solids by equivalent diameters (RM0.5, RM1, RM2.5, RM5 and RM10).

Keywords: indoor air, indoor air quality, air pollution, dust, solid suspended particles, PM2.5, PM10

The article is devoted to the issue of improving devices for cleaning gas station emissions from hydrocarbon vapors to improve the environmental safety of zones and territories of residential development. The largest part of the release of gasoline vapors entering the local aspiration systems is associated with the filling and emptying of fuel storage tanks at gas stations. It is known that emissions of benzene vapors belonging to the second hazard class have a significant problem in terms of exceeding the maximum permissible concentrations at the boundaries of the sanitary protection zones of gas stations and nearby residential buildings. Creation of new highly efficient technologies and devices for reducing the volume of pollutant emissions from gas filling complexes, while reducing operating costs by the amount of emissions and waste generated, developing reliable gas trapping devices of acceptable low material and energy consumption for gas station aspiration schemes is an urgent task. Another reason of elaborations’ needs of those gas trapping devices are reducing operating costs and environmental payments for emissions and waste. It was carried out environmental – economic research to verify justification to use absorption-type apparatuses within an absorbent mixture of sodium-magnesium salt’s solution (bischofite solution) and waste water of from a local purification device. It was allowed reducing emissions from sources of gas station aspiration schemes using capturing gasoline hydrocarbon vapors by mention above apparatus. It is essential reducing negative emissions’ impact of harmful substances and an additional amount of generated waste of gas stations. There are presented the results of calculating volume of the fees’ environmental damage, and economic efficiency of the use the proposed type of sorbent’ apparatus in this article also. The use of the proposed device in gas station aspiration schemes allows deceasing environmental payments for emissions including carbon taxes and fees and additional operating costs in terms of the use of consumables. The successful tests carried out have shown the reliable and efficient operation of the pilot plant with the proposed device at the gas station. The successful tests carried out have shown the reliable and efficient operation of the pilot plant set up with the proposed device that decreased environmental payments for emissions, waste and operating costs.

Keywords: gas station, gasoline, emission, atmosphere, concentration, hydrocarbons, aspiration, absorption, device, bischofite, water

The article presents the results of research work that provides a correct solution to the problem of assessing the quality of drainage water that is formed in the process of coal mining. In the context of this problem, the following main tasks have been solved: - assessment and ranking of technogenic factors of impact on the hydrosphere of the region; - selection of the main parameters of the environment for the development of research methods; - formation of models to substantiate the quality control of drainage waters. The authors of the article have developed scientific and technical solutions that represent an objective basis for interpreting research materials on the territory of a coal-mining region. The article presents the main results of the system analysis of experimental and theoretical studies. In particular, the authors show that the main types of models should be models of objects - sources of pollution, models of technogenic impacts and a model of a natural and technical system.

Keywords: coal-mining region, mine waters, quality control, coal rock massif, technogenic pollution, hydrosphere, system analysis, hydromonitoring

The factors influencing the process of flocculation during aeration are analyzed. It is determined that the effect is due to the damping of small-scale pulsations of water during mixing, accelerated formation of nuclei of solid phases of coagulant hydrolysis products on the surface of air bubbles due to electrostatic and surface forces, as well as the release of excess amounts of carbon dioxide from the water. Theoretical dependences have been obtained showing that the dose of coagulant injected into the mixer with simultaneous aeration of water is proportional to the concentration of heterophase impurities and inversely proportional to the average particle size of contaminants, the gas saturation of the resulting water-air mixture and the velocity gradient.

Keywords: natural water, coagulant, mixer, aeration, coagulant dose, velocity gradient

The article shows the predominant location of the city on the river, the modern development of transport navigation, including for local, suburban and intracity transportation, there has been an ever-increasing demand for individual water transport used to travel by water to places of rest. Bank protection and construction of a road in the right-bank zone of Volgograd will contribute to the development of the transport network and tourist infrastructure of the city. With the growth of the fleet of motor boats, which use mainly propeller motors to drive the propellers of river craft, the volume of fuel consumed also grows. The first "carbon footprint" on the water surface from motor boats appears at the stage of refueling the outboard motor. The second "carbon footprint" is associated with the design features of the propeller-driven boat motor of small river vessels, which release exhaust gas below the surface of the water. Therefore, ensuring the environmental safety of the coastal zone of the city is an urgent issue for research. The proposed possibility of reducing the carbon footprint when organizing a walking water route along the coast of the city through the use of an electric drive from renewable energy sources for small water transport will be a factor in the greening of the coastal zone, contributing to the revitalization of boat tourism and services for organizing active recreation of citizens and visiting guests.

Keywords: ecology, rocky road, small water transport, carbon footprint, renewable energy sources, electric drive of water transport.

At present, despite the variety of mini-loaders in terms of purpose and type of work performed, the problems associated with the technology of snow removal from roads and adjacent areas remain relevant. Along with the continuous growth of the municipal machinery fleet, qualitative changes are constantly being made to its working equipment, aimed at increasing the productivity and efficiency of the snow removal process through the introduction of new rational and technical solutions.

Keywords: mini-loader, blade, snow removal, working equipment, snow cover, compaction, hydraulic cylinders, shock absorbers

This article explores the application of Fitwel's green certification standard to office buildings where employees spend most of their lives. The importance of the conditions of the office building in which its employees are located in terms of the impact on health and productivity was emphasized. The essence and advantages of using the Fitwel standard are demonstrated.

Keywords: office building, certification, green standard, Fitwel, health, productivity

The article offers an environmentally friendly method to assemble pipes into section in order to build, to reconstruct or to fully repair pipelines both in urban communities and outside them eliminating load-carrying devices. The technique is realized with a specially designed assembly line (DAL) consisting of similar devices positioned along one line. The proposed assembly line is executed as multi-functional since the complete range of production processes can be performed with it, starting from unloading pipe sections to laying a ready section into a trench or onto an elevated pipe pier. The offered engineering solution can be used in all places. 3-D spatial models are presented in the article for illustrative purposes.

Keywords: environmentally friendly method, assembly works, pipeline, pipeline assembly, lifting equipment, engineering process

The article offers a solution which will enable to reduce dust pollution during earthworks in urban conditions. A special multi-functional mechanism is proposed enabling to perform several important preliminary processes simultaneously - improving an environmental situation on the site of earthworks. The ground surface damping during trench opening and soil unloading from a bucket into a disposal area will make it possible to reduce the fine dust pollution of the air surrounding a work location. The objective of the study is to develop a mechanism reducing the fine dust dispersal when performing trench and pit excavation. The novelty is that a mechanism of special construction has been proposed that can be mounted onto any machine in the construction line.

Keywords: earthworks, dispersal, technology process, trenching, single-bucket excavator, soil disposal area, trench, fine dust, air pollution, РМ 2,5, PМ 10

This article is devoted to the consideration of the possibility of using LED technologies in solving the problems of organizing artificial lighting of the historical part of the urban environment. A unique set of properties of modern LED sources, such as a wide dynamic color spectrum, low power consumption, ease of installation, long-term uninterrupted operation, environmental friendliness of production and operation, chemical and physical resistance to external influences, provides them with a steady demand for solving the problems of street and architectural lighting of historical quarters of the city, emphasizing their originality and uniqueness.

Keywords: artificial lighting, architectural lighting, lighting design, lighting systems, LED, LED technology, energy saving, environmental friendliness

The purpose of this work is to determine the possibility of using a fine fraction (screening) of landfill waste located on the western outskirts of Volgograd as recultivating soil. The following priority indicators were determined in the selected samples: hydrogen index (pH), the content of benz(a)pyrene, petroleum products and groups of elements related to heavy metals: mercury, cadmium, arsenic, lead, zinc, nickel and copper, namely forms extracted with acid and buffer solution and ammonium acetate with a pH of 4.5. Excess of normative values in the samples was noted for such toxicants as cadmium, nickel and copper. The value of the total indicator of chemical pollution Zc without taking into account the toxicity coefficient was 30.03, and taking into account - 46.34, which corresponds to the categories ""moderately dangerous"" and ""dangerous"". It is determined that the small fraction of landfill masses belongs to the 4th class of waste hazard - low-hazard. Direct use of sieving as a soil recultivant is not possible. It is necessary to carry out measures to detoxify it. Due to the presence of components with carcinogenic properties, acceptable detoxification directions are extraction or encapsulation of heavy metals.

Keywords: landfill masses, fine fraction, chemical pollution, hazard class

This article is devoted to the actual problem of using curvilinear. stained glass facades of buildings in a modern urban environment. Stained glass glazing of radial facades of buildings is one of the characteristic elements of modern architecture due to significant advantages, such as reducing wind and climatic load on the building, environmental friendliness, energy efficiency, improving microclimate parameters, increasing artistic and compositional attractiveness, etc. The article considers a set of tasks, the solution of which will allow eliminating the negative consequences of the use of curved translucent structures in the outer shell of the building by taking maximum account of technological climatic, physical and aesthetic factors in the design of modern glazing systems for high-rise buildings with curved facades.

Keywords: translucent enclosing structures, radius facades, climatic load, high-rise buildings, glass unit lensing, focusing, urban environment, energy saving, environmental friendliness

The results of studies of the kinetics of the iron-catalytic oxidation of hydrogen sulfide by atmospheric oxygen in a reactor with a membrane separator are presented. The studies were carried out on a laboratory experimental complex. The dependences were obtained experimentally showing the effect of the catalyst dose - Fe (OH) 3¬, the pH of the medium, and the contact time of the water being purified with the reaction medium on the effect of water purification from hydrogen sulfide.

Keywords: hydrogen sulfide, iron catalytic oxidation, air oxygen, iron hydroxide, membrane separation, ultrafiltration

Monitoring of atmospheric air in settlements allows you to control the environmental situation there and predict environmental risks for the population. It is known that acidic impurities in the atmospheric air of urban areas affect the human respiratory system. The proven relationship between acidic aerosols from the atmospheric air and the functioning of the human respiratory system indicates the relevance of studies of monitoring acidic impurities in the atmospheric air in order to predict environmental risks for the population. In this regard, the purpose of the study was to monitor the aerosol acidity indicator in the residential area of ​​the Svetly Yar Republic (Svetloyarsk district of the Volgograd region) for the spring-summer period in 2019 and predict environmental risks for the population. The material for the study was aerosol particles from the leaves of apricot trees (Prunus armeniaca) from the village of Svetly Yar (Svetloyarsk district of the Volgograd region), from which aerosol suspensions were prepared and which were studied in terms of acidity (pH). The studies carried out made it possible to identify acidic impurities in aerosols in the village. Light Yar (pH = 4.56 + 0.028). This fact indicates the environmental risks for the population associated with the acidic environment of aerosols, since it is known that acidic air pollution can aggravate asthma, promote the development of bronchospasms, and inhibit the respiratory system. It is required to identify sources of pollution in order to develop environmental measures to protect the population from acidic impurities in the atmosphere.

Keywords: monitoring,aerosols, acidity, pH, urban environment, environmental risks

The publication considers "small" leaks of oil products in city Volgograd, which are mainly represented by gasoline leaks at gas stations and leaks of technical liquids from vehicles in parking lots. The properties of these leaks are investigated. The regularities of oil products entering the air from "small" leaks are obtained. Measures are developed to improve the efficiency of collecting leaks. The design of a container for storing and accumulating waste generated as a result of collecting "small" leaks of oil products is proposed and tested. The obtained test results showed that the proposed container design can significantly reduce atmospheric air pollution compared to the commonly used container design.

Keywords: oil products, leaks, properties of "small" leaks, gas station, parking lots, wastes, container, city

The article discusses the features of environmental safety management systems of organizations in the electric power sector, and also presents an approach to their improvement. The authors substantiate that an important aspect of improving the environmental safety of electric power companies is the integration of quality and environmental management processes in the organization. Based on the analysis of scientific literature and the regulatory framework, the problems of integration of environmental management systems, quality management and organization management are identified. As one of the approaches to improving the environmental management system of electric power industry organizations, a management model of an environmentally-oriented organization based on the PDCA cycle and a quality management system, as well as scientifically based principles of its construction, is proposed. The key advantages of the model are: an expanded methodological base in comparison with the models of environmental management and quality management based on the Deming сycle "Plan-Do-Check-Act" the possibility of effective integration with the general management system; decision-making based on various factors of the external and internal environment of the organization.

Keywords: environmental safety, integrated management model, environmental safety management in the electric power industry, Deming сycle

In recent years, municipal solid waste management in developed countries has been based on the principle of recycling and reusing secondary products. The overseas level of sorting and disposal of waste is higher and more detailed, it refers to a higher economic level, cultural level of quality of life, government investment, appropriate policies and the construction of related auxiliary facilities. This article discusses some of the systems and methods for sorting municipal solid waste in order to justify the need to develop a system for object recognition when sorting waste.

Keywords: municipal solid waste, waste sorting problems, waste preparation for sorting, technologies for automatic waste sorting

The article provides an analysis of the occupational morbidity of welders, the nomenclature and levels of hazardous and harmful production factors at the workplaces of welders, and also formulates measures for the prevention of occupational diseases and industrial injuries of welders.

Keywords: occupational diseases, dangerous and harmful production factors, occupational risk, special assessment of working conditions

This work is devoted to the application of cluster analysis in solving tasks of managing fire hazardous events in socio-economic systems. The simulation results showed that, depending on the factors that determine the fire situation in the territory, it is possible to assess the fire hazard in the region. The proposed approach will allow planning the necessary fire-fighting measures as part of a unified state system for the prevention and elimination of emergencies at various levels.

Keywords: objects, fire situation, territories, living sector, socio-economic system, cluster analysis

The paper considers the dynamics of drought periods based on meteorological data for a multi-year period. The research area covers the basins of the Sokolovsky reservoir and the Taganrog Bay. In the course of the study, the following tasks were performed: climatograms were constructed, a correlation analysis of the course of the total amount of precipitation and the course of average annual temperatures was performed, the deviation of air temperatures from the climatic norm for the considered areas was revealed. The tendency to increase the dry period in the Rostov region from north to south has been revealed, which may have an adverse effect on the hydrological regime of water bodies.

Keywords: dry period, Sokolov reservoir, Taganrog Bay, Rostov region, drought, climate, climate data, precipitation, air temperature

Architecture designed in accordance with the principles of sustainable development becomes an important part of the path towards achieving sustainable development of the economy, society, the environment and architecture itself at the same time. This article explored the basic definitions, principles, and factors to consider when designing a sustainable architecture. A sustainable development model was also demonstrated, which provides an understanding of how sustainable design works.

Keywords: architecture, sustainable development, low carbon, ecology, global warming, design

Construction work creates a lot of dust and has a significant impact on the air quality in the surrounding area. This article presents the results of studies conducted by foreign and Russian authors to assess the risk of exposure to fine dust from a construction site. The urgency of protecting a person from fine dust and the problems associated with its effect on the human body are shown. The issues of concentration of dust, which are the most dangerous for human health, are considered. Measures are proposed to reduce the impact of RM on humans.

Keywords: Fine dust, PM10, PM2.5, environmental protection, human health, construction, mortality, risk, cardiovascular system, harmful factor, labor, protection

Monitoring the acidity index of aerosols is one of the directions of ensuring the ecological safety of settlements. The purpose of this work was to study the acidity index (pH) of aerosol suspensions (washing off aerosols from the leaves of apricot trees (Prunus armeniaca) obtained in the village of Sredny Akhtuba (Sredneakhtubinsky district of the Volgograd region) in the spring-summer of 2019. Leaves with aerosol particles served as the material for the study. of one species of woody plants (apricot trees (Prunus armeniaca)), where 1 sample was 300-400 cm2 of leaf surface area. In the experimental territory and in the conditionally clean zone, a total of 200 samples were studied. Thus, 1 sample of leaves of apricot trees (Prunus armeniaca) was placed in a glass container with 250 ml of distilled water, stirred for several minutes with a glass rod to wash off particles from the surface of the leaves.As a result, aerosol suspensions were obtained, which were further investigated in terms of acidity (pH). electrochemical equipment of the "MULTEST" series (Russia). To verify the insignificance of the differences in the samples, we used the apparatus for testing the hypotheses about the homogeneity of the samples - the nonparametric Kruskal - Wallis test. Statistical hypotheses were tested at a significance level of 0.05. All necessary calculations were performed in the R statistical package (version 3.6.1, R Core Team 2020). The results of testing the hypotheses indicate that there are no statistically significant differences within each study area. Thus, at a significance level of α = 0.05, the hypotheses about the homogeneity of the samples are recognized as significant, and accordingly, they can be compared. The studies carried out made it possible to establish acidic aerosols in the atmosphere of Srednyaya Akhtuba compared to the conditionally clean zone (SNT "Oroshenets", "Shelf"), which indicates environmental risks for the population.

Keywords: environmental safety, monitoring, aerosols, acidity, pH, urban environment

This article is devoted to the study of the characteristics of fine dust particles in the gym. The monitoring of the dust content of the sports premises with fine particles was carried out, and the dispersed composition of the settled dust was also studied. The regularity of the dust distribution in the room depending on the measurement height is analyzed. The analysis of the state of the system of external respiratory organs is carried out.

Keywords: monitoring, gym, dispersion analysis, fine particles, respiratory organs, PM2. 5, PM10, dust factor