https://sci.ldubgd.edu.ua/jspui/handle/123456789/5455 2026-04-12T15:50:46Z 2026-04-12T15:50:46Z Sysa, Leonid Rudyk, Yurii Kontsur, Andrii Рудик Юрій Іванович https://sci.ldubgd.edu.ua/jspui/handle/123456789/10810 2024-04-18T12:55:42Z 2017-01-01T00:00:00Z

Title: ANALISIS OF ADSORPTION ISOTHERMS OF ZINC IONS ON BENTONITE AFTER PROCESSING IT WITH ULTRAHIGH-FREQUENCY RADIATION Authors: Sysa, Leonid; Rudyk, Yurii; Kontsur, Andrii; Рудик Юрій Іванович Abstract: This article provides research of adsorption characteristics of natural argillaceous material bentonite, processed by means of previously moisturizing and radiation with ultrahigh-frequency electromagnetic waves (i.e. “microwaves”). The research was aimed at studying the possibility to enhance efficiency of sorption purification of water from zinc ions by low cost sorbents. Methodology. Adsorption isotherms of zinc ions before and after irradiation by microwaves were obtained in static conditions on model solutions of zinc sulphate. We calculated adsorption parameters of bentonite, processed with the use of microwaves and native samples, by applying the Freundlich equation. Results. The boundary capacity of irradiated sorbent by zinc is approximately 0,027 mmol/g (or 1,78 mg/g), and for the native bentonite the value of the same parameter is 0,019 mmol/g (1,23 mg/g). The joint action of two factors – microwave irradiation and hydrothermal destruction of the surface of crystals – affects the surface structure of the clay material, the distribution of the macro and micropores, the activation of the adsorbing surface, which, in turn, leads to a change in the sorption parameters. After calculating the energy efficiency of the typical process of regeneration of sorbents – with calcination (E1), reduced to the unit mass of the sorbent (1 kg), the estimated energy consumption was obtained: E1 = 6.25 kW/kg. The method proposed by the authors uses the microwaves E2 = 0.45 kW/kg, which is an order of magnitude smaller than the energy consumption in the method of calcination. Originality. For the first time, we have studied the impact of microwaves on efficiency of removal of zinc ions from water by sorption onto bentonite. Practical value. It is suggested to use such a method of preparation of sorbent before the main flow of contaminated water in the process of wastewater treatment of small establishments. References 14, tables 1, figures 3.

2017-01-01T00:00:00Z Рудик Юрій Іванович Назаровець, Олег Головатчук, Іван Рудик Юрій Іванович https://sci.ldubgd.edu.ua/jspui/handle/123456789/5887 2024-04-18T12:55:57Z 2018-01-01T00:00:00Z

Title: СУЧАСНІ ПІДХОДИ ДО ВЛАШТУВАННЯ СИСТЕМНОГО БЛИСКАВКОЗАХИСТУ СПОРУД З УРАХУВАННЯМ ПОЖЕЖНОЇ НЕБЕЗПЕКИ ТА ОСОБИСТОГО РИЗИКУ Authors: Рудик Юрій Іванович; Назаровець, Олег; Головатчук, Іван; Рудик Юрій Іванович

2018-01-01T00:00:00Z Сиса, Леонід Володимирович Рудик Юрій Іванович Кирилів, Ярослав Богданович Рудик Юрій Іванович https://sci.ldubgd.edu.ua/jspui/handle/123456789/5756 2024-04-18T12:56:10Z 2018-06-01T00:00:00Z

Title: Гетерогенна кристалізація з розчинів електролітів на поверхні алюмосилікатних сорбентів під впливом мікрохвильового опромінення Authors: Сиса, Леонід Володимирович; Рудик Юрій Іванович; Кирилів, Ярослав Богданович; Рудик Юрій Іванович Abstract: The effects of microwaves treatment of an aqueous suspension of clay sorbent bentonite with a model solution of zinc sulfate are studied. The microstructure of the surface of bentonite after sorption cleaning was studied by scanning electron microscopy, energy dispersive and X-ray phase analysis. It is shown that the microcrystals formed on the surface of the sorbent are complex hydrated zinc polysilicate. A possible mechanism for the formation of crystal nuclei under the action of microwaves is proposed.

2018-06-01T00:00:00Z Menshykova, Olha Rak, Taras Рудик Юрій Іванович Рудик Юрій Іванович https://sci.ldubgd.edu.ua/jspui/handle/123456789/5755 2024-04-18T12:56:28Z 2018-01-01T00:00:00Z

Title: Expanding of Compliance Assessment for Preventive Measures of Fire Safety as a Local Facilities with High Risk Level in Ukraine Authors: Menshykova, Olha; Rak, Taras; Рудик Юрій Іванович; Рудик Юрій Іванович Abstract: This paper presents the application of agent-based quantitative risk assessment with а fundamental review of public attitudes towards firefighting, a qualitative increase in the level of community responsibility for security. This is the goal that must be set, involving volunteers for their self-organization in matters of fire suppression. Involving volunteers in the task of preventing and eliminating fires will be more effective and will have a more productive result. This will minimize the time of arrival of the first fire-fighting unit to a place of fire or emergency, especially in the countryside. In addition, local, communal, volunteer organizations need to be widely involved in significantly enhancing the culture of safety among people, awareness and responsibility, and improving their personal skills and ability to work in extreme situations. The process of improving the existing system of supervision over control in the field of fire and …

2018-01-01T00:00:00Z