Environmental Problems

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    Study of the process of adsorption of petroleum products methods of multivariate cluster analysis
    (Видавництво Львівської політехніки, 2023-02-28) Sabadash, Vira; Konovalov, Oleh; Nowik-Zajaç, Anna; Lviv Polytechnic National University; Jan Dlugosz University in Czestochowa
    The article is devoted to studying the process of adsorption of oil products using multivariate cluster analysis methods. The study solves the problem of environmental pollution with petroleum substances and the search for effective cleaning methods. The work aims to study the prospects of using synthetic zeolites to effectively purify industrial wastewater from oil products. The scientific novelty of the study is the study of the potential of synthetic zeolites as adsorbents to ensure an efficient and environmentally friendly process of cleaning industrial wastewater from petroleum products. The adsorption research methodology included selecting and preparing eight types of adsorbents, determining temperature and concentration range, measuring adsorption capacity, data processing and analysis of results. In the experimental study, the photometric method was used, one of the most accurate and widely used methods for measuring the adsorption of petroleum products. The study results indicate some materials potential for the effective adsorption of petroleum products. The study provides grounds for recommendations regarding the optimal conditions for the adsorption process and the selection of materials for further research and development. The application of multivariate cluster analysis in the study of the adsorption process of oil products opens up new opportunities for solving environmental pollution problems and developing effective technologies for cleaning the environment. The outcomes of this study are anticipated to significantly benefit industries dealing with petroleum product separation and pollution control. By offering a more comprehensive understanding of the adsorption process, this research opens avenues for developing tailored adsorption strategies for specific applications.
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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.
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    Investigation of the processes of chemical (ACID) labilizing of clinoptilolite
    (Lviv Politechnic Publishing House, 2017-03-21) Troszkiy, Volodymyr; Hnativ, Zoriana; Duleba, Vasyl; Kriuchenko, Tetiana; Lviv Polytechnic National University
    The results of research of the chemical activation process of clinoptilolite from Sokirnytskyi field are shown. As a result of the research, the effectiveness of the influence on zeolite hydrochloric and sulfuric acids are compared. It should be noted that the advantage is on the side of hydrochloric acid. It was established that the increase in the concentration of sulfuric acid and the time of zeolite processing leads only to the increase in the content of the amorphous phase. As a result of the experiment, optimal conditions for zeolite activation: reagent – hydrochloric acid, concentration of acid – 7 %, the processing time – 2 hours, phase ratio T:R – 1:2 were selected.
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    Decontamination of radioactive liquid systems by modified clay minerals
    (Publishing House of Lviv Polytechnic National University, 2016) Petrushka, Ihor; Moroz, Olexandr
    The process mechanism for sorption of strontium and cesium from liquid radioactive waste using modified bentonites from Yaziv sulfur deposit was investigated. The technique for predicting the intensity of the sorption process based on the comparison of experimental and calculated values of mass transfer coefficients was proposed. It was detected that the process of sorption extraction of strontium and cesium from liquid medium using modified clay minerals may be best described by a three-parameter model of the adsorption isotherms.