Autor: Gomelya, Mykola - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Mathematical Prediction of Sorption Processes of Heavy Metals on Cation Exchangers Using the Thomas Model
Autorzy:: Koliehova, Anastasiia
Trokhymenko, Hanna
Gomelya, Mykola
Powiązania:: https://bibliotekanauki.pl/articles/1955572.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metals
ion exchange
sorption
Thomas model
wastewater treatment
Opis:: On a production scale, it is advisable to use mathematical models for predicting the treatment of effluents from heavy metal ions, which will increase the efficiency of enterprises. The sorption processes of copper, zinc, nickel and cadmium ions on the KU-2-8 cation exchange resin in the acid form at different concentrations were studied in this scientific work. At the same time, the sorption curves calculated were constructed using the Thomas model. The study results showed that this model very clearly describes the sorption processes of metals on the resin. Thus, it can be used to predict the processes of wastewater treatment in production.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 232-236
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Efficiency of Reverse Osmosis and Ion Exchange in Water Purification from Nitrates
Autorzy:: Gomelya, Mykola
Shabliy, Tetyana
Makarenko, Iryna
Vakulenko, Anna
Powiązania:: https://bibliotekanauki.pl/articles/2202127.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: nitrates
membrane
reverse osmosis
ion exchange
selectivity
productivity
permeate
concentrate
regeneration
Opis:: The process of extracting nitrates from water by the methods of reverse osmosis and ion exchange was investigated in the paper. In the formation of reverse osmosis, low-pressure membranes were used, and in ion-exchange processes, highly alkaline anionite AB–17–8 was applied in salt form. The dynamics of changes in the concentration of nitrates in the permeate and the concentration with an increase in the degree of permeate selection from 9 to 90% at initial nitrate concentrations of 18, 50 and 100 mg/dm3 were determined. The indicators of selectivity and productivity of membranes were calculated depending on the degree of permeate selection. It was shown that the low-pressure reverse osmosis membrane is characterized by low selectivity values at high productivity values in the selected part of the nitrate concentration. It was established that the ion exchange method is significantly more effective than reverse osmosis in removing nitrates from water. It ensures the reduction of nitrate content in purified water to a value of less than 1 mg/dm3 when the degree of their extraction is reached at the level of 99%. As the ionite is saturated with nitrates, the efficiency of their extraction decreases. Anionite sorbs nitrates effectively enough, being both in the chloride mixture and in the sulfate form. Nitrates are effectively desorbed by 2H solutions of sodium chloride and sodium or ammonium sulfate.
Źródło:: Journal of Ecological Engineering; 2022, 23, 10; 172--180
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determining the Efficiency of Reverse Osmosis in the Purification of Water from Phosphates
Autorzy:: Gomelya, Mykola
Shabliy, Tetyana
Radovenchyk, Iaroslav
Vakulenko, Anna
Powiązania:: https://bibliotekanauki.pl/articles/2202364.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: phosphates
water treatment
water purification
reverse osmosis
permeate
concentrate
selectivity
productivity
Opis:: Processes of water purification from phosphates using a low-pressure reverse osmosis membrane were studied. It was shown that the concentration of phosphates in the permeate largely depends on their initial concentration in the water and increases along with the degree of permeate selection. It was established that when using the Filmtec TW3–1812–50 membrane for phosphate concentrations up to 20 mg/dm3, their concentration in the permeate does not exceed 2.5 mg/dm3 with a degree of permeate selection up to 90% when cleaning solutions in distilled and artesian water. This value is below the permissible level for drinking water. When the concentration of phosphates increases to 100 and 1000 mg/dm3, their content in the permeate increases sharply to the values significantly higher than the permissible level in both drinking and wastewater. When sodium orthophosphate was added to artesian water, the effectiveness of its purification on this membrane with respect to chlorides, sulfates, hardness ions, and hydrocarbons was high. This indicates that the cartridges with these membranes can be used both in industrial installations and in households for further purification of artesian and tap water to drinking water quality.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 238--246
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Usage of Sorbent-Catalyst to Accelerate the Oxidation of Manganese
Autorzy:: Gomelya, Mykola
Tverdokhlib, Mariia
Shabliy, Tetyana
Linyucheva, Olga
Powiązania:: https://bibliotekanauki.pl/articles/1839661.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: manganese(II) ion
oxidation
catalyst
sorbent
modified cation exchange resin
water purification
magnetite
Opis:: The processes of manganese (II) ions removal from water using sorbent catalysts and ion exchange materials modified with iron oxides were studied. It was shown that manganese ions oxidize very slowly in artesian water, even when the pH is adjusted to 9.0. Intensive aeration of solutions due to stirring also does not promote the oxidation of manganese (II) ions. The degree of manganese extraction due to oxidation is reduced from 20–30% for solutions with a concentration of manganese ions of 1 and 5 mg/dm3 to 11–15% for solutions with a concentration of 15 and 30 mg/dm3. A significant increase in the oxidation efficiency of manganese ions was achieved by using magnetite as a sorbent catalyst. The efficiency of water demanganization increases along with the intensity of water aeration when mixing solutions. It was established that strongly acid cation exchangers provide efficient extraction of manganese ions from water. At the same time, a high exchange capacity of strong acid cation exchange resin KU-2–8 in acid and salt form was noted. It was shown that the capacity of manganese ions of this cation exchange resin in the Ca2+-form is slightly lower. When using the KU-2–8 in Ca2+-form of cation exchange resin to remove manganese ions from the solution already in the first samples, the leakage of manganese ions at the level of 10 mg/dm3 and above was observed. This indicates that this form of ion exchanger is not suitable for deep purification of water from manganese (II) ions. In order to increase the efficiency of manganese ion extraction from water, increase the duration of the filter cycle, magnetite and magnetite-modified KU-2–8 cation exchange resin were used as a sorbent-catalyst. It was shown that the cation exchange resin modified with magnetite provides the removal of a significant part of manganese ions due to catalytic oxidation on magnetite. The conditions of effective manganese extraction under static and dynamic conditions are determined.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 232-239
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Treatment of Wastewater Containing a Mixture of Heavy Metal Ions (Copper-Zinc, Copper-Nickel) using Ion-Exchange Methods
Autorzy:: Koliehova, Anastasiia
Trokhymenko, Hanna
Melnychuk, Svitlana
Gomelya, Mykola
Powiązania:: https://bibliotekanauki.pl/articles/125436.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metals
ion exchange
regeneration
cation exchanger
sorption
Opis:: The main aim of the scientific research was to study the ion-exchange processes in the treatment of industrial wastewaters containing a high concentration of heavy metal ions (Cu²⁺, Zn²⁺, Ni²⁺). The sorption results of heavy metal mixtures (Cu-Zn, Cu-Ni) from model solutions of sulfate salts on a strong-acid KU-2–8 cation exchanger in the H⁺-form were presented. The metals concentration was 10–50 meq/dm³. The efficiency conditions of cation regeneration in Cu²⁺-Zn²⁺, Cu²⁺-Ni²⁺-forms by 5, 8 and 10 % sulfuric acid solutions were studied. It was shown that the heavy metals from aqueous media can be removed not only from ion exchangers, but can also be restored from regenerative solutions by electrolysis to obtain metals in pure form. In general, the research results showed that the use of ion exchange is very effective in removing the heavy metal ions. The sorption efficiency and regeneration efficiency was about 100%.
Źródło:: Journal of Ecological Engineering; 2019, 20, 11; 146-151
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Electrochemical Purification of Oil-Containing Shipping Waters
Autorzy:: Vozniuk, Marta
Shabliy, Tetyana
Gomelya, Mykola
Sirenko, Ludmila
Sidorov, Dmytro
Powiązania:: https://bibliotekanauki.pl/articles/27323824.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: oil-containing water
bilge water
electrocoagulation
ship wastewater
electrolysis
aluminum anode
iron anode
Opis:: The article describes the modern problems of formation and purification of marine oil-containing waters. The efficiency of using electrocoagulation to remove oil from water-oil emulsions of different mineralization using aluminum and iron anodes was studied. Treatment of water-oil solutions with an oil content of 100 mg/dm3 by electrocoagulation in a single-chamber electrolyzer provides 98–99% oil removal using these electrodes at an anode current density of 0.57–2.11 A/dm2 for highly mineralized waters and 0.34 A/dm2 for freshwater treatment during the first 15 minutes provides a reduction in oil concentration from 100 mg/dm3 to values at the level of 1.55–2.93 mg/dm3. When the water treatment time is extended to 45 minutes, greater efficiency in highly mineralized waters is provided by the aluminum anode.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 246--253
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Sorbent-Catalyst for Acceleration of The Iron Oxidation Process
Autorzy:: Gomelya, Mykola
Tverdokhlib, Mariia
Shabliy, Tetyana
Radovenchyk, Vyacheslav
Linyucheva, Olga
Powiązania:: https://bibliotekanauki.pl/articles/1839169.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: iron ions
magnetite
sorbent
catalyst
deironing
sorption capacity
Opis:: In this work, the process of water deironing by using magnetite as a catalyst to accelerate the oxidation of iron ions in an aqueous medium was investigated. It was shown that the efficiency of iron ion extraction depends on the solution concentration, sorbent dose and contact time. In all cases, the use of magnetite accelerated the process of extraction of iron by more than an order of magnitude in comparison with similar experiments on the oxidation of iron without the addition of a catalyst. At the pH values greater than 6, the use of magnetite as a catalyst contributes to the deep purification of water from iron ions.
Źródło:: Journal of Ecological Engineering; 2021, 22, 3; 221-230
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Development of New Water Deoxidization Systems for Heat and Power Plants
Autorzy:: Shabliy, Tetyana
Gomelya, Mykola
Pohrebennyk, Volodymyr
Ivanenko, Olena
Nosachova, Yuliia
Powiązania:: https://bibliotekanauki.pl/articles/2025740.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: redoxite
deoxidation
ion exchange resin
ion exchange resin modification
Opis:: The analysis of water conditioning methods for closed water supply systems was carried out in the work. The expediency of using redoxites based on ion exchange materials to combat the corrosion processes in water recirculation systems by preliminary deoxidation of water was shown. Modified KU-2–8, Dowex Mac-3, AB-17–8, Dowex Marathon WBA, AMBERLITE IRA 96 ion exchange resins were used as deoxidizing materials.
Źródło:: Journal of Ecological Engineering; 2022, 23, 1; 193-205
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Estimation of the Efficiency of Ammonia Oxidation in Anolyte of Two-Chamber Electrolyzer
Autorzy:: Gomelya, Mykola
Shabliy, Tetyana
Radovenchyk, Iaroslav
Overchenko, Tetyana
Halysh, Vita
Powiązania:: https://bibliotekanauki.pl/articles/123631.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonia
electrolysis
anolyte
catholyte
anion exchange membrane MA-41
Opis:: In this study, the processes of electrochemical oxidation of ammonia in a two-chamber electrolyzer with anion exchange membrane MA-41 were investigated. An estimation of the efficiency of the process of oxidation of ammonia, depending on the chemical composition of the initial solution of anolyte and catholyte, current density and time of electrolysis was carried out. It was shown that the oxidation of ammonia in the anode chamber passes quickly and is accompanied by a significant decrease in pH due to the formation of nitrogen dioxide and nitrates. At the same time, the current output and the electrical conductivity of the dilute solutions was rather low. The effect of chlorides on the process of electrolysis was investigated. It was shown that the presence of chlorides in the anolyte catalyzes the processes of oxidation of ammonia. An increase in the concentration of chlorides in the anolyte increases output and reduces electricity consumption. The presence of chlorides in the catholyte does not accelerate oxidation. The presence of sulfates, both in the anolyte and in the catholyte, slows down the process of oxidation of ammonia as a result of the oxidation of sulfates to persulfates, which are quite passive to ammonium ions. At the same time, electricity consumption increases.
Źródło:: Journal of Ecological Engineering; 2019, 20, 5; 121-129
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Utilization of Modified Biosorbents Based on Walnut Shells in the Processes of Wastewater Treatment from Heavy Metal Ions
Autorzy:: Halysh, Vita
Trus, Inna
Gomelya, Mykola
Trembus, Iryna
Pasalskiy, Bogdan
Chykun, Nadiia
Trokhymenko, Ganna
Remeshevska, Iryna
Powiązania:: https://bibliotekanauki.pl/articles/125359.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: spent biosorbent
utilization
building materials
low-waste technology
Opis:: The problem of utilizing plant wastes of the agro-industrial complex is equally important and urgent. In this regard, it is advisable to develop a complex technology of plant waste application to solve the ecological problems of environmental pollution with heavy metals. Modification of walnuts shells with orthophosphoric acid has proven to be a promising process for obtaining the biosorbents with the efficient sorption properties. It was found out that the increase in the concentration of inorganic acid in modification time promotes the improvement in sorption capacity. Such biosorbents can be used in low-waste water demineralization systems. The utilization of waste biosorbents through the use in the composition of building materials is effective from an economic point of view. It was shown that the biosorbent acts as a fine additive; the increase in normal density and acceleration in hardening time takes place. At the same time, the compressive strength of the cement with the application of biosorbents decreases slightly. The results show that the modified walnuts shells have a slightly adverse effect on the hardening time of cement.
Źródło:: Journal of Ecological Engineering; 2020, 21, 4; 128-133
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Starch Modification to Ensure Resource Savings and Environmental Safety in the Production Cardboard from Waste Paper
Autorzy:: Halysh, Vita
Trus, Inna
Tverdokhlib, Mariia
Nosachova, Yuliia
Krysenko, Tamara
Hlushko, Olena
Ploskonos, Victor
Radovenchyk, Vyacheslav
Gomelya, Mykola
Powiązania:: https://bibliotekanauki.pl/articles/2202218.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: starch
modification
cardboard
wastewater
turbidity
Opis:: Development of new and modification of existing chemicals, which act not only as binders, but also provide increased retention of fiber and other pulp components on the paper machine grid, accelerate pulp dehydration, and provide special properties (moisture resistance, heat resistance, improvement of other technical characteristics of paper and cardboard) of paper and cardboard, is an important and urgent task of chemical technology and ecology. This paper presents results of the corn starch modification with epoxypropyltriethanolammonium chloride, hexamethylolmelamine and hexamethylenetetramine. Modified starches provide the necessary strength indicators of cardboard from waste paper and low turbidity of wastewater. The obtained starches can be used in mills that use low-quality waste paper for the production of cardboard and paper products with the aim of saving fiber, reducing wastewater pollution and as a result reducing the negative impact on the environment.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 68--75
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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