Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item Synergetic effect of digestate dissolved organic matter and phosphogypsum properties on heavy metals immobilization in soils(Sumy State University, 2024) Скворцова, Поліна Олексіївна; Skvortsova, Polina Oleksiivna; Аблєєва, Ірина Юріївна; Ablieieva, Iryna Yuriivna; Tonderski, K.; Черниш, Єлізавета Юріївна; Chernysh, Yelyzaveta Yuriivna; Пляцук, Леонід Дмитрович; Pliatsuk, Leonid Dmytrovych; Сіпко, Ірина Олександрівна; Sipko, Iryna Oleksandrivna; Mykhno, H.I.The main idea was to justify the natural, technological, and ecological aspects of digestate-based composite for heavy metals (HMs) binding in soil due to organic matter content and mineral additives’ biosorption properties. The study aimed to determine the potential of a composite made from digestate and phosphogypsum for remediation of HMs polluted soils and the role of dissolved organic matter (DOM) in binding HMs. Methods used included a literature review to identify the mechanisms for HM binding to digestate DOM, a laboratory setup for producing a digestate-based composite with digestate (from manure or sewage sludge) mixed with phosphogypsum, and an analysis of digestate fluorescence properties. Results show that a composite based on digestate from manure as feedstock had a higher fluorescence complexity index than a composite with sewage sludge digestate (2.2 and 1.71, respectively). However, the DOM stability in the sewage sludge digestate composite was higher than reported in the literature, probably due to the mineral composition of phosphogypsum, which resulted in a high HMs sorption capacity and its positive effect on soil microbial activity. Based on the theoretical substantiation of DOM content and its binding properties, manure was the most effective feedstock type out of the two tested if digestate was used for HM remediation. Using a digestate-based composite with phosphogypsum can potentially reduce the ecological risk levels imposed by HM-contaminated soils from considerably too low.Item Application of technological solutions for bioremediation of soils contaminated with heavy metals(Sumy State University, 2021) Черниш, Єлізавета Юріївна; Черныш, Елизавета Юрьевна; Chernysh, Yelyzaveta Yuriivna; Пляцук, Леонід Дмитрович; Пляцук, Леонид Дмитриевич; Pliatsuk, Leonid Dmytrovych; Roubik, H.; Яхненко, Олена Миколаївна; Яхненко, Елена Николаевна; Yakhnenko, Olena Mykolaivna; Скворцова, Поліна Олексіївна; Скворцова, Полина Алексеевна; Skvortsova, Polina Oleksiivna; Батальцев, Євген Володимирович; Батальцев, Евгений Владимирович; Bataltsev, Yevhen VolodymyrovychThis article focuses on studying biotechnologies for remediation of soils contaminated with heavy metals to determine further the most effective methods for cleaning soils from the action of toxicants with their subsequent implementation in practice. The soil restoration methods were analyzed, their advantages and disadvantages were identified, making it possible to establish that biological methods are the safest and most environmentally friendly. The expediency of using biological methods lies in the possibility of breeding strains of microorganisms that destroy soil toxicants. However, the efficiency of microbial cultures is not equally high due to a narrow range of favorable conditions for functioning, the risk of manifestation of the phenomenon of degeneration of microorganisms until the required level of soil purification is achieved. This confirms the prospects for the further development of this direction and the search for ways to eliminate certain disadvantages of biological methods. For an integrated biotechnological solution to soil remediation, a scheme of aerobic plants was developed, which is characterized by two stages: aerobic soil cultivation with biocomposite and a phytoremediation stage for additional purification and control of the content of toxicants in the soil.Item Capturing aerosol particles in a device with a regular pulsating nozzle(Sumy State University, 2021) Козій, Іван Сергійович; Козий, Иван Сергеевич; Kozii, Ivan Serhiiovych; Пляцук, Леонід Дмитрович; Пляцук, Леонид Дмитриевич; Pliatsuk, Leonid Dmytrovych; Гурець, Лариса Леонідівна; Гурец, Лариса Леонидовна; Hurets, Larysa Leonidivna; Volnenko, A.A.The paper is dedicated to reducing the technogenic impact on the environment of using highly efficient apparatus for the complex exhaust gas treatment, operating in the advanced turbulence regime – an apparatus with a regular pulsating nozzle (RPN). Devices with on-load tap-changers are characterized by high efficiency of capturing solid particles of different dispersion (e.g., fog, dust, and smoke), the possibility of self-cleaning of contact elements from sticky dust, low material consumption, and high reliability in operation. Purpose of the study – to obtain analytical solutions for assessing the efficiency of capturing polydisperse aerosols in an apparatus with an on-load tap-changer due to diffusion and inertial mechanisms. The paper proposes a new solution for the minimum effective diameter of aerosol particles that can be captured in devices with an on-load tap-changer and can be used for a wide range of diameters of absorbing liquid droplets and their number in the volume of the apparatus. The calculations allow us to say that the minimum effective diameter of aerosol particles captured by liquid drops in an apparatus with an on-load tap-changer is less than 0.3 microns.Item Modeling of innovation research clusters in the field of radioactive waste utilization(Sumy State University, 2020) Черниш, Єлізавета Юріївна; Черныш, Елизавета Юрьевна; Chernysh, Yelyzaveta сriivna; Пляцук, Леонід Дмитрович; Пляцук, Леонид Дмитриевич; Pliatsuk, Leonid Dmytrovych; Azarov, S.; Tsutsumiuchi, K.; Kotova, I.The situation with the processing and disposal of radioactive waste, including the liquid phase, is not resolved. Many questions remain regarding the environmental safety of processes and the technological implementation of the most energy-efficient solutions. Thus, the article’s main attention is paid to theoretical studies of the development innovation directions of radioactive waste processing using the VOSviewer software tool. The clusters were formed under modeling directions of application of radiolysis for radioactive waste utilization: the red cluster includes research of radionuclide sorption processes and their concentration for radiolysis of liquid media; the green cluster concerns factors of influence on water radiolysis in hydrogen production; the yellow cluster includes research areas of natural processes related to radiolysis; the blue cluster is connected with mathematical modeling of radiolysis process with fuel production and engineering implementation and the purple cluster related to the processes of radioactive waste management and disposal as well as the application of radiolysis for this purpose. The cluster simulations of nanoparticle and radiolysis applications for radioactive waste treatment have resulted in a new energy recovery strategy. The development of new matrix materials in combination with nanoparticles for the agglomeration and concentration of radionuclides is a promising innovation method improving radiolysis under hydrogen production from radioactive waste.