Екологія
Постійний URI для цього зібранняhttps://repositary.knuba.edu.ua/handle/987654321/1243
Переглянути
4 результатів
Результати пошуку
Документ A study of air pollution with formaldehyde along the highways in Kyiv city(2018) Voloshkina, O.; Sipakov, R.; Zhukova, O.; Bereznitska, J.The problem of air pollution in the cities of Ukraine was described. The methodology of calculation of hydrocarbon emission on automobile overpasses and crossroads of Kyiv was suggested. By the number of bands, the number of cars was determined. The calculation has shown that at the same time near 300 cars can be on the overpass during peak hours. The average concentration of formaldehyde according to the calculations and observation data in 2016 was presented.Документ Assessment and forecast for the creation of photo-chemical smog over transport overpasses in Kyiv(2018) Sipakov, R.; Trofimovich, V.; Voloshkina, O.; Bereznitska, J.This article deals with the analysis of existing of smog situation formation over automobile overpasses and in places of substantial congestion of transport in large cities, for example, in Kyiv. A mathematical model consisting of two blocks – dynamic and kinetic, which allows determining the formation of the thermal dome of pollution and the concentration of hydrocarbon emissions in the air, depending on the number of working engines, is proposed. The kinetic block of the model allows determining the level of formaldehyde, as an indicator of the appearance of photochemical smog in conditions of atmospheric constancy. The concentration of emissions from motor vehicles in the air is calculated over the main transport overpasses of the city of Kyiv at their full load (peak hours).Документ Impact of weather factors on the speed of the reaction of formaldehyde formation above motorway overpasses(Lviv Politechnica, 2018) Sipakov, R.; Trofimovich, V.; Voloshkina, O.; Bereznitskaya, Y.The analysis of the actual air condition in the city of Kyiv in the areas of big overpasses and crossroads shows that the average annual concentration of formaldehyde more than 3 times exceeds the maximum permissible concentration (MPC) of this toxic substance. One of the most powerful sources of formaldehyde formation in the air of the city is motor vehicles. The role of weather factors in formaldehyde formation rate (K) depending on capacity of emissionsof internal combustion engines has been analyzed in this article. The equation for determining rate constant hasbeen obtained, which depends on the temperature in the city of Kyiv and on the value of effective energy activation of the mentioned process. The comparison of the calculated and measured values of the rate reaction constant in Observation Point (OP) No. 9 in the area of Leningradska square has been given. The conducted research gives the opportunity to assess and obtain forecasting data on atmospheric pollution and probability of smog situations emergence in Kyiv. The suggested methodology can be used for other cities in Ukraine where motor vehicles are the main indicator of photochemical smog emergence.Документ Risk of atmospheric air pollution by formaldehyde in urban areas from motor venicles(2019) Voloshkina, O.; Sipakov, R.; Tkachenko, T.; Zhukova, O.The work is devoted to the issue of risk management for the health of the population in urban areas in case of atmospheric air pollution by motor transport. In this study, the level of risk is determined on the basis of concentrations of formaldehyde molecules, which are formed as secondary air pollution as a result of photochemical transformations in the air under steady meteorological conditions. In the estimation of the amount of hydrocarbon emissions from road transport, which is simultaneously at the traffic junction, a mathematical model which is based on the theory of a convective jet on a warm surface and which allows obtaining parameters of the contaminated dome of air formed over this area was used. The proposed risk management scenario allows searching for optimal managerial decisions at the municipal level for a number of scientific and practical tasks of the city in shaping its environmental policy.