Environmental Problems

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Subject: search.filters.subject.phosphates

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    Extraneous diffusion kinetics of ammonium ions adsorption in the presence of other ions
    (Видавництво Львівської політехніки, 2022-06-01) Sabadash, Vira; Gumnitsky, Jaroslaw; Petrus, Roman; Lviv Polytechnic National University; Pzeszów University of Technology
    The article presents the results of the study of the kinetics of ions adsorption from multi-component mixtures. The isotherms of sorption of ammonium nitrogen in the presence of phosphates indicate a decrease in the exchange capacity of zeolite due to its competition for active absorption centres. This study was carried out with two ions of inorganic nature. In the presence of the third organic component in the solution (protein substance – albumin), the sorption capacity of zeolite decreases even more in comparison with ammonium ions. It was found that in the presence of phosphates, the equilibrium capacity of zeolite towards ammonium decreases by about 30 %; in the three-component system the reduction reaches about 70 %.
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    Complex water treatment of agroindustrial complexes
    (Publishing House of Lviv Polytechnic National University, 2016) Sabadash, Vira; Gumnitsky, Jaroslav; Tyzrbir, Galyna
    The aim of this work was studying the process of phosphate adsorption on natural and synthesized adsorbents such as aluminosilicates. Sorption properties of natural zeolite concerning phosphates in static and dynamic conditions were investigated. It was found that phosphates were absorbed better in an acidic environment. Zeolites based on fly ashes of Dobrotvir heat power plant were synthesized and modified. The equilibrium values of adsorption capacity were established and the proper isotherms at a temperature 20 °C were built.