Environmental Problems

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Author: search.filters.author.Lopushansky, Oleksiy

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    Statistical assessment of the dynamics of changes in the PM10 and PM2.5 level in the air of urbanized areas
    (Видавництво Львівської політехніки, 2023-02-28) Sabadash, Vira; Lopushansky, Oleksiy; Lysko, Vitaliy; Lviv Polytechnic National University
    This article addresses the issue of atmospheric pollution caused by solid particles in urban environments. The presence of PM10 and PM2,5 particles in the air of major cities and industrial areas worldwide has been examined. An evaluation of atmospheric pollution levels with PM10 and PM2,5 particles in Kostopil, considering current air quality standards in Ukraine and the European Union, has been conducted. The authors employed the gravimetric method to measure the levels of suspended dust particles (PM10 and PM2,5) in Kostopil from autumn 2022 to winter 2023. The study revealed an excessive amount of fine dust particles in the city's air, exceeding the maximum permissible values outlined in regulatory laws by 2.1-2.7 times. Furthermore, the monitoring of changes in suspended dust particle levels showed peak values of PM10 = 1.15 mg/m³ in January and PM2,5 = 0.96 mg/m³ in December. The results of the statistical analysis of particle level distribution in Kostopil's urban areas indicated the statistical significance of certain distribution parameters, specifically SW-W and D for PM10 and PM2,5 particle classes.
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    Dynamics of carbon dioxide adsorption by carbon nanotubes
    (Видавництво Львівської політехніки, 2023-02-28) Sabadash, Vira; Gumnitsky, Jaroslaw; Lopushansky, Oleksiy; Matsuska, Oksana; Nowik-Zając, Anna; Lviv Polytechnic National University; Lviv National University of Veterinary Medicine and Biotechnologies named after S. Z. Gzhytskyi; Jan Dlugosz University in Czestochowa
    This article is devoted to the study of the carbon dioxide adsorption process. The relevance of using carbon nanotubes for adsorbing carbon dioxide from industrial emissions is that carbon nanotubes have a high surface area and can effectively interact with carbon dioxide molecules. In addition, they have high mechanical strength and chemical resistance, which makes them attractive for industrial use. Carbon nanotubes have the potential to reduce carbon dioxide emissions and reduce the negative impact on the environment. Using carbon nanotubes in the industry can help reduce greenhouse gas emissions and the environmental impact of burning fossil fuels. Purpose. The work aimed to study the prospects of using carbon nanomaterials to purify industrial emissions from carbon dioxide in a fluidized state. The scientific novelty of the topic "Dynamics of carbon dioxide adsorption by carbon nanotubes" is the study of the influence of temperature and gas velocity on the initial curves of CO2 adsorption dynamics in the fluidized state.