Environmental Problems

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Author: search.filters.author.Petrushka, KaterynaSubject: search.filters.subject.natural sorbents

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    Features of adsorption processes for wastewater treatment from zinc ions
    (Видавництво Львівської політехніки, 2021-06-01) Petrushka, Ihor; Bratus, Oksana; Petrushka, Kateryna; Lviv Polytechnic National University
    The results of adsorption properties of complex natural sorbents in relation to the neutralization of zinc ions from wastewater are presented. The adsorption isotherm of Zn2+ ions on complex sorbents (clinoptilolite-shungite) (1:1) according to Langmuir and Freundlich models is constructed, the type of adsorption isotherms according to S. Brunauer classification is established. The value of the maximum sorption capacity of Gmax complex sorbents for Zn2+ ions is calculated. The peculiarities of the sorption process of zinc ions with the formation of a monomolecular layer based on the calculated coefficients of the Langmuir and Freundlich were found. The optimal conditions for the dependence of the degree of absorption of Zn2+ ions by complex sorbents on the duration of the sorption process are determined. The ratio “solid (complex sorbent) – liquid” was determined experimentally.
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    Improvement of adsorption processes of wastewater treatment from nickel ions
    (Видавництво Львівської політехніки, 2020-02-10) Petrushka, Ihor; Petrushka, Kateryna; Bliatnyk, Bohdanna; Lviv Polytechnic National University
    The sorption properties of natural and complex sorbents for neutralization of Ni2+ ions from the water environment were studied. The isotherm of the adsorption of Ni2+ ions on complex sorbents (activated bentonite to shungite is 1:1) according to the Langmuir and Freundlich’s models was drawn; the type of adsorption isotherms according to the S. Brunauer’s classification was established. The values of the maximum sorption capacity of Гmax sorbents relative to Ni2+ ions were calculated. Based on the calculated coefficients of the Langmuir and Freundlich's equations, the specificity of the process of sorption of Nickel ions with the formation of a monomolecular layer was determined. The dependences of the degree of absorption of Ni2+ ions by complex sorbents on the duration of the sorption process were obtained. The ratio of solid state of matter (comprehensive sorbent) to liquid was experimentally determined.