Environmental Problems

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    Use of Modified Adsorbents to Remove Pesticides From Wastewater
    (Видавництво Львівської політехніки, 2022-03-01) Sabadash, Vira; Gumnitsky, Jaroslaw; Nowik-Zając, Anna; Zawierucha, Iwona; Krylova, Galyna; Lviv Polytechnic National University; Academy of Jan Dlugosz in Czestochów
    The migration of highly concentrated pesticide solutions in the soil has been experimentally studied. A mathematical model of the diffusion process in the soil environment has been developed. Based on the mathematical model, a system of equations for calculating the duration and intensity of the process depending on environmental parameters was obtained. The dependence of the process velocity on the direction of the diffusion front is determined, and the diffusion coefficients, kinetic coefficients of the diffusion process and the diffusion front velocity were calculated. Environmental aspects of pesticide migration were analysed. The diffusion coefficient of glyphosate in the model soil environment is established. Under the experimental conditions, the diffusion coefficient value was D = 1.755×10-12 m2/s. The study results of the process of migration of the component up the soil profile indicate the mechanism of molecular diffusion of glyphosate in the soil environment. The results of experimental research and the solution of the mathematical model were used to model the migration process in the Comsol Multiphysics environment. Analysis of theoretical and experimental results showed that the developed model could be used to calculate the dynamics of the spread of the pesticide front in the soil with sufficient accuracy.
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    Investigation of migration of heavy metals in the soil environment on the example of copper sulfate
    (Lviv Politechnic Publishing House, 2019-02-26) Lyuta, Oksana; Sabadash, Vira; Beymuk, Mariya; Gumnitsky, Jaroslav; Lviv Polytechnic National University
    The problem of permanent and prolonged pollution of soils by various kinds of pollutants, in particular heavy metals, was analyzed. Experimental investigations of penetration of copper sulfate into a vertical soil profile have been carried out. The adsorption capacity of the sandy environment of copper sulfate was experimentally determined.
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    Assessing the impact of Sumy CHP on soil
    (Lviv Politechnic Publishing House, 2017-03-21) Pliatsuk, Leonid; Hurets, Larysa; Miakaieva, Hanna; Miakaiev, Oleksandr; Sumy State University
    The paper presents assessment of the impact of Sumy CHP when pollutants come into soils with atmospheric precipitation and filtration from the area of the ash and slug dump. Samples of snow were tested for the content of heavy metals and ash particles. Soil samples were tested for the content of heavy metals. The conducted research showed a high degree of soil contamination in the area of Sumy CHP influence.