Кульнев Вадим Вячеславович, кандидат географических наук, ведущий специалист-эксперт, отдел государственного экологического надзора по Воронежской области Центрально-Черноземного межрегионального управления Федеральной службы по надзору в сфере природопользования, Воронеж,

Introduction. Airfields and aerodrome territories are objects of hygienic and environmental expertise, since their functioning is accompanied by the impact of adverse factors on the population and the environment. In this regard, both at the design stage and during the operation of the airfield, a quantitative assessment of the risk to public health is necessary. The aim of the study was to verify the establishment of the design boundaries of the seventh subzone of the aerodrome territory by noise and carcinogenic factors. Materials and methods. The materials used in the work are design materials for the establishment of the aerodrome territory of the Voronezh civil aviation airfield ʺVoronezh (Chertovitskoye)ʺ and data from instrumental and laboratory control (noise factor, concentrations of carcinogens in atmospheric air) obtained by the Center for Hygiene and Epidemiology in the Voronezh Region. Results. At the border of the seventh subzone of the aerodrome territory, the highest values of the estimated risk index for the noise factor were found to be characteristic of the risk for the cardiovascular system (up to 0.013), at the same time, they do not exceed the low risk level (less than 0.05). The levels of the total individual carcinogenic risk at the border of the seventh subzone of the aerodrome territory of the airfield are in the range from 3.01 · 10-8 to 3.56 · 10-7; outside the seventh subzone at the border of the nearest residential development in the range from 3.26 · 10-8 to 2.16 · 10-7, which is classified as the value of the target risk for the conditions of populated places in Russia. Limitations. The limitations of the study are related to the fact that the work uses design data obtained using currently existing and approved calculation methods for noise levels and concentrations of carcinogenic substances in the surface layer of atmospheric air in the aerodrome area, as well as a limited number of results of instrumental measurements of noise levels and laboratory monitoring of carcinogens in the air. At the same time, the regulatory and methodological framework for assessing the risk to public health caused by the impact of the studied factors, taking into account the receipt of new data on the impact of adverse environmental factors on human health, is constantly being revised and improved. Conclusion. The noise impact factor is decisive in establishing the boundaries of the seventh subzone of the aerodrome territory. The design boundaries of the seventh subzone of the aerodrome territory of the ʺVoronezh (Chertovitskoye)ʺ civil aviation airfield for the carcinogenic factor and the aviation noise factor are confirmed by full-scale laboratory studies of the concentrations of carcinogens in the surface layer of air and instrumental measurements of aircraft noise levels and comply with current sanitary and hygienic and environmental requirements.

Algoremediation which is a method of natural and waste water treatment due to the metabolic potential of chlorococcal microalgae is based on the principle of system stability. The method of pollution degree estimation of anthropogenic loaded water object based on the application of fractal calculation is shown. Factor analysis has been used to determine the parameters of the environmental system of Nizhny Tagil city pond which are the basis for a new approach to evaluating the efficiency of environmental protection measures through geoecological risk management.

The article proposes a computational method for determining the concentrations of pollutants inside a ventilated or cleaned room, taking into account the initial conditions and parameters of the flow rate, incoming or purified air, the volume of the room, the initial concentrations of the pollutant in the atmospheric air and in the room air, the parameters of the efficiency of the air cleaner. The article proposes the solution of two mass transfer equations under known initial conditions for two methods of cleaning rooms. When solving the first equation, a direct mass transfer calculation was carried out, which makes it possible to determine the effect of natural or artificial ventilation used indoors with small linear dimensions on the change in the concentration of the selected air polluting substance in the form of a chemical compound or an aerosol containing biological or chemical pollutants. When solving the second equation, a direct mass transfer calculation was carried out, which makes it possible to determine the effect of the operation of an air purifier used indoors with small linear dimensions on the change in the concentration of the selected air polluting substance in the form of a chemical compound or an aerosol containing biological or chemical pollutants. Calculations allow us to determine the time during which a residential office or industrial space is saturated with pollutants or cleaned to the required air quality standards, taking into account the influence of factors such as pollution of the surface layers of atmospheric air, the appearance of pollutants inside the room, the performance and efficiency of ventilation or air purification systems. The proposed calculation methods can be used to determine changes in the quality of indoor air over time, including taking into account changes in oxygen concentrations and pollutants indoors, determining the effectiveness of ventilation and air purification systems of various capacities in residential, office, medical and industrial premises. Ethics. The study does not require the submission of a biomedical ethics committee opinion or other documents.