Tatiana Yuzakova

• University of Pannonia

Graphitic carbon nitride (g-C3N4) proved to be a promising semiconductor for the photocatalytic degradation of various organic pollutants. However, its efficacy is limited by a fast electron hole recombination, a restricted quantity of active sites, and a modest absorption in the visible range. To overcome these limitations, g-C3N4-Bi2S3 and g-C3N4...

Kaolin-based graphitic carbon nitride (g-CNx) composite photocatalysts were synthesized from a urea precursor using a commercial kaolin. Structural characterization by X-ray diffraction and infrared spectroscopy (FTIR) verified the successful thermal polycondensation of g-CNx along the thermal dehydroxylation of kaolinite to metakaolin at 550 °C. T...

The degradation of diisopropyl methylphosphonate (DIMP) in aqueous solutions was studied using ultrasound irradiation with a fixed frequency of 26.2 kHz, following the first-order kinetic model. The study's primary goal was to determine the influence of the following experimental parameters: the pH (at different values of 2, 7 and 10), the initial...

The purpose of this work was to develop, characterize and test new low-cost materials suitable for removing methylene blue dye from water and wastewater by adsorption. The solid materials consisted of silica gel powder (SG), silica gel mixed with eggshell powder (SG-ES) and a mixture of silica gel with sand from the western Iraqi desert (SG-SI). Th...

This work aimed to prepare and characterize nano-silica (SiO2) from agricultural waste (palm ash) through a leaching treatment process using citric acid (C6H8O7). These waste materials (if present in large quantities) could lead to environmental issues, since palm waste materials are burned in a furnace at 700 °C for 5 h. The produced palm ash (PA)...

This study examined >140 relevant publications from the last few years (2018–2021). In this study, classification was reviewed depending on the operation's progress. Electrocoagulation (EC), electrooxidation (EO), electroflotation (EF), electrodialysis (ED), and electro-Fenton (EFN) processes have received considerable attention. The type of action...

The purpose of this study was to examine the application of the mathematical model of drift flux to the experimental results of the effect of cationic trimethyl-ammonium bromide (CTAB)-aided continuous foam flotation harvesting on the lipid content in Chlorella vulgaris microalgae. An experiment was conducted to determine the effect of the operatin...

Titanium-dioxide-based semiconductors proved to be appropriate for photocatalytic application to efficiently degrade emerging organic pollutants such as various herbicides, pesticides, and pharmaceuticals in waters of environmental importance. The characterization of various TiO2 catalysts, both bare and modified (Ag- and/or N-doped), by mechanoche...

Hazardous substances originating from aromatic compounds pose seriously harmful effects on aquatic animals and the environment, which has received the attention for the treatment. This work used Multi-Walled Carbon Nano-Tubes (MWCNTs) modified with vanadium-pentoxide V2O5 nanoparticles and 2wt% of different nanocomposite mixtures to remove methylen...

Considerable amounts of domestic and industrial wastewater that should be treated before reuse are discharged into the environment annually. Electrocoagulation is an electrochemical technology in which electrical current is conducted through electrodes, it is mainly used to remove several types of wastewater pollutants, such as dyes, toxic material...

The aim of this study was to recover Sc as the main product and Fe as a by-product from Hungarian bauxite residue/red mud (RM) waste material by solvent extraction (SX). Moreover, a new technique was developed for the selective separation of Sc and Fe from real RM leachates. The presence of high Fe content (∼38%) in RM makes it difficult to recover...

Multiwalled carbon nanotubes (MWCNTs) were oxidized using a mixture of H2SO4 and HNO3, and the oxidized MWCNTS were decorated with magnetite (Fe3O4). Finally, poly-N-isopropyl acrylamide-co-butyl acrylate (P-NIPAM) was added to obtain P-NIPAM/Fe/MWCNT nanocomposites. The nanosorbents were characterized by various techniques, including X-ray diffrac...

The synthesis and structural characterization of synthetic zinc oxide and halloysite-based zinc oxide nanocomposites (with 2–28 m/m% ZnO content) are presented. The chemical precipitation of zinc hydroxide precursors and its subsequent drying at 80 °C yielded dominantly zinc oxide (zincite). Thermal treatment at 350 °C completely transformed the re...

The growing global economy resulted in an incessant increase in transportation and exploitation of oil. Hence, the oil spillage has been considered a serious threat to aquatic and terrestrial ecosystems. Therefore, water purification has been considered a major challenge around the world. There are numerous classical methods available for oil remov...

This paper studied the adsorption of chemical oxygen demand (COD), oil and turbidity of the produced water (PW) which accompanies the production and reconnaissance of oil after treating utilizing powdered activated carbon (PAC), clinoptilolite natural zeolite (CNZ) and synthetic zeolite type X (XSZ). Moreover, the paper deals with the comparison of...

This study aims to optimize the extraction efficiency of Sc(III) by dicyclohexano-18-crown-6 (DC18C6) and kryptofix 2.2.2 (K 2.2.2) macrocyclic compounds as novel extractants using response surface methodology (RSM). Additionally, it was intended to design a method for recovering Sc from an aqueous model solution using molecular recognition technol...

This paper deals with an advanced colorimetric method used to determine the catalase mimetic activity of V 2 O 5 nanoparticles by measuring the decrease in potassium permanganate concentration in a mixture containing V 2 O 5 and hydrogen peroxide. The experiments were carried out in batch reactor at room temperature for 3 min at wavelength number o...

Recently, efforts have been made to develop the extraction, recovery, and analysis of rare earth elements, especially the scandium Sc (III). This study describes the use of 15-crown-5, 12-crown-4, cryptand 2.2.2, and DC18-crown-6 as novel extractants using molecular recognition technology to effectively and selectively separate and recover Sc from...

In this paper, the application of multiwalled carbon nanotubes (MWCNTs) based on metal oxide nanocomposites as adsorbents for the removal of hydrocarbons such as kerosene from water was investigated. Functionalized MWCNTs were obtained by chemical oxidation using concentrated sulfuric and nitric acids. V2O5, CeO2, and V2O5:CeO2 nanocomposites were...

In this study, a nano-adsorbent was prepared for kerosene removal from water. Multiwalled carbon nanotubes (MWCNTs) were functionalized with concentrated HNO3 (nitric acid). Subsequently, Fe3O4 (magnetite) nanoparticles were deposited on the MWCNTs to prepare a magnetite/MWCNTs (Fe-MWCNTs) nanocomposite. Then, polyethylene was added to the Fe-MWCNT...

Heavy metals cause deleterious effects on human health and drastically alter the biogeochemical cycles within freshwater habitats. The main human activities leading to heavy metal contamination of various aquatic ecosystems comprise the industry, agriculture, urbanization, transport and mining. Lake Nasser is the main freshwater source in Egypt, us...

This paper deals with V2O5 nanoparticles adsorbents which were obtained by thermal pretreatment carried out by increasing the temperature between 90 and 750°C. In order to obtain more detailed information on the surface chemistry of the newly prepared nanoparticles, the characterisation was done by X-ray diffraction and scanning electron microscopy...

In this research, multi-walled carbon nanotubes (MWCNTs) were functionalized by oxidation with strong acids HNO3, H2SO4, and H2O2. Then, magnetite/MWCNTs nanocomposites were prepared and polystyrene was added to prepare polystyrene/MWCNTs/magnetite (PS:MWCNTs:Fe) nanocomposites. The magnetic property of the prepared nano-adsorbent PS:MWCNTs:Fe was...

In this article, we provide an overview of the methods used to enhance the recovery of rare‐earth elements (REEs) from bauxite residue or red mud (RM). RM is a byproduct of the Bayer alumina production process. Storage is an issue with regard to both space and the environment. The composition of the RM varies depending on the original bauxite sourc...

In order to maintain a good environmental status of surface waters, an assessment of water quality carried out at specific intervals to monitor the changes of water quality in function of time. Human knowledge and experience are currently focused on using assessment methods, especially the integration of multiple constraining factors and considerin...

This paper investigates the adsorption of oil, chemical oxygen demand (COD) and turbidity of the produced water (PW) which accompanies the oil exploration and production after treatment by using powdered activated carbon (PAC), clinoptilolite natural zeolite (CNZ) and synthetic zeolite type X (XSZ). Moreover, the paper deals with the comparison of...

The main objective of this work is to produce an eco-friendly and economically nano-adsorbent which can separate scandium metal ions Sc from a model aqueous phase prior to applying these adsorbents in industrial filed. The magnetic core-shell structure Fe3O4@SiO2 nanoparticles were synthesized by modified Stöber method and functionalized with (3-am...

Aromatic compounds can be efficiently degraded using boron-doped diamond (BDD) anodes by the anodic oxidation based on the generation of hydroxyl radicals (•OH). In this study, the degradation of Cartap in Padan 95SP (a pesticide) by BDD via the reaction between Cartap and oxidizing species (such as hydroxyl radicals, active chlorine, and persulfat...

The nanoparticles of the magnetic core-shell Fe 3 O 4 @SiO 2 were produced using a modified Stöber approach and functionalized with (3-amino-propyl) APTES triethoxysilane and ethylene-diamine-tetra-acetic acid (EDTA). Magnetic nano adsorbents exhibit many attractive opportunities for different purposes due to their easy removal and possibility of r...

To date, numerous oily contaminants have posed a significant risk of severe pollution to the environment. In this study, functionalized multi-walled carbon nanotubes (MWCNTs) were impregnated with 2wt.% metal oxides (MxOy= TiO2, V2O5), respectively. The modified MWCNTs were successfully studied and characterized to determine the structure and chemi...

The intervention of human activity in the vicinity of water body has imposed big threat for water quality deterioration. Lake Balaton, a shallow and an eutrophic lake found in Hungary, has been used for different economical activities like recreation, bathing, drinking water source, and other plenty activities that have potential for disturbance of...

The nanoparticles of the magnetic core-shell Fe3O4@SiO2 were produced using a modified Stöber approach and functionalized with (3-amino-propyl) APTES triethoxysilane and ethylene-diamine-tetra-acetic acid (EDTA). Magnetic nano adsorbents exhibit many attractive opportunities for different purposes due to their easy removal and possibility of reusin...

The aim of this study was to prepare novel supramolecular hybrid nanoparticles (HNPs) that can selectively separate and recover scandium metal ions, Sc(III), from an aqueous phase based on molecular recognition technology (MRT). Moreover, this approach is fully compatible with green chemistry principles. In this work, natural amorphous silica (SiO...

In this research, manganese oxides (MnO2) nanoparticles were prepared by hydrothermal method using KMnO4 as a precursor. The final brown–black precipitate MnO2 nanoparticles as prepared, and annealed at different temperatures (250, 450, and 750 °C) were characterized. The nanoparticles prepared were tested for removal of methylene blue (MB), used a...

Catalysts for visible-light-driven oxidative cleaning processes and antibacterial applications (also in the dark) were developed. In order to extend the photoactivity of titanium dioxide into the visible region, nitrogen-doped TiO2 catalysts with hollow and non-hollow structures were synthesized by co-precipitation (NT-A) and sol–gel (NT-U) methods...

The radon isotope, 222Rn, has a significant impact on human beings due to the irradiation caused illnesses. The article deals with the process of radon entering into residential buildings and its residential exposure level related to changes in environmental parameters such as temperature, pressure and moisture content. Dependence of the indoor rad...

The article deals with the treatment of methylene blue (MB) contamination of effluents and the MB removal capacity of various materials such as activated carbon (AC), PGα21Ca, sulfate heptahydrate (SH), aluminium sulfate octadecahydrate (ASO) and poly aluminium chloride (PAC). The combination of PGα21Ca and AC was investigated in the treatment proc...

Lake Nasser is one of the largest man-made lakes on earth. It has a vital importance to Egypt for several decades because of the safe water supply of the country. Therefore, the water quality of the Lake Nasser must be profoundly investigated, and physico-chemical parameter changes of the water of the Lake Nasser should be continuously monitored an...

This paper deals with an advanced colorimetric method used to determine the catalase mimetic activity of V 2 O 5 nanoparticles by measuring the decrease in potassium permanganate concentration in a mixture containing V 2 O 5 and hydrogen peroxide. The experiments were carried out in batch reactor at room temperature for 3 min at wavelength number o...

This paper deals with an advanced colorimetric method used to determine the catalase mimetic activity of V2O5 nanoparticles by measuring the decrease in potassium permanganate concentration in a mixture containing V2O5 and hydrogen peroxide. The experiments were carried out in batch reactor at room temperature for 3 min at wavelength number of 525...

α-MnO2 exhibits an excellent catalytic activity in different chemical reactions, functions as enzyme alternative, as so-called artificial enzyme which is used in different applications such as industrial, environmental and biological applications (antibacterial activity). The current study, reports the synthesis of α-MnO2 and rutile TiO2 nanostruct...

MnO2 exhibits an excellent catalytic activity in different chemical reactions, functions as enzyme alternative, as so-called artificial enzyme which is used in different applications such as industrial, environmental and biological applications (antibacterial activity). The current study, reports the synthesis of α-MnO2 and rutile TiO2 nanostructur...

TiO2-assisted photocatalysis is used in numerous environmental applications and for the manufacturing of different products. Ag-doped TiO2 nanoparticles were synthesized by impregnation using silver nitrate solution on TiO2 obtained by sol-gel method and on commercial Degusa P25 (Evonik). Silver is widely studied as a dopant for semiconductor mater...

Metal-organic frameworks (MOFs) had until recently the reputation of being one of the most critical porous materials. Their flexibility, however, has gained a lot of attention due to the wide selection of possible combinations between metal nods and/or ligands. Nonetheless, it is not always easy to identify the source of flexibility. This chapter f...

Aquatic geochemical distribution in the Central, Highland, and Southern regions of Vietnam, including: Da Nang city (Hoa Khanh Industrial Park, Aquaculture Industrial Zone Tho Quang, Do Toa River Deposit Area), Da Lat city (Prenn Pass), Dong Nai province (Suoi Ram hamlet, Cam My district, Long Giao) was investigated by using 2D electrical resistivi...

In this paper, a new type of heterogeneous catalytic system was devised for the synthesis of 4,4′-bis-(2,6-di-t-butylphenol), (hereinafter referred to as bisphenol-VN). The properties of the catalytic system were studied using SEM–EDS and transmission electron microscope methods. The results have demonstrated the presence of hydrophobic phenolate l...

Much has been written about the fundamental aspects of the metal-organic frameworks (MOFs). Still, details concerning the MOFs with structural flexibility are not comprehensively understood. However, a dramatic increase in research activities concerning rigid MOFs over the years has brought deeper levels of understanding for their properties and ap...

This work aims to investigate the potential of Jordanian raw zeolitic tuff (RZT) as oil adsorbent for oil-contaminated water. As hydrophobic properties are the primary determinants of effective oil adsorbents, the hy-drophobicity of RZT was enhanced by dealumination process; since the degree of hydrophobicity of zeolites is directly dependent on th...

Huge quantity of red mud is being generated by aluminum industry which is a potentially hazardous material depending on its pH value and creates serious environmental pollution. The purpose of the present work was to develop and improve technological steps to recover the rare earth elements (REEs) such as (Sc, La, Y) from the Hungarian red mud whic...

The increase of CO2 concentration in the atmosphere is in strong relation with the human-induced warming up due to industrial processes, transportation, etc. In order to reduce the CO2 content, end of pipe post-combustion methods can be used in addition to other methods and techniques. The CO2 capture by absorption in potassium carbonate–bicarbonat...

Hungary 2-MAL Hungarian Aluminum Producing and Trading Closed Share Company, Ajka, Hungary The objectives of this work was to develop new ways and methods for the recovery of the rare earth elements (REEs) such as (Sc, La, Y) from the Hungarian red mud, Ajka, MAL company, which is presently considered as a waste material and to achieve optimum REEs...

This paper deals with the practical implementation of cleaner technologies in the chemical industry, using two case studies as an illustration. The first case study deals with the removal of NOx and N2O gases over an iron-doped ZSM-5 catalyst developed for tail gas treatment in nitric acid manufacturing. The aim for this case study was to investiga...

Heterogeneous copper catalysts were prepared by the deposition of CuI on a hybrid material consisting of silica and a polymer with imidazolium moieties. The solid materials were characterised using solid‐phase NMR, Fourier transform infrared, Raman and X‐ray photoelectron spectroscopies and Brunauer–Emmett–Teller measurements. The formation of copp...

Huge amount of red mud has been disposed for the past several decades and it is still generating all over the world. Red mud is a waste of the bauxite processing industry obtained during the alkaline extraction of alumina from bauxite ore. The red mud is a potential raw material containing several valuable components including iron, titanium and ra...

One of the issues of the Hungarian Water Management Strategy is the improvement and upgrading of the water of Lake Balaton. The Water Framework Directive (WFD) specifies and sets forth the achievement of the good ecological status. However, the assessment of the water quality of the lake as a complex system requires a comprehensive monitoring and e...

In this work synthetic zeolite catalysts were modified by metal loading and used for real end of life vehicle plastic waste pyrolysis. ZSM-5 and y-zeolite catalysts were loaded by Ce²⁺, Cu²⁺, Fe²⁺, Fe³⁺, H⁺, Mg²⁺, Ni²⁺, Sn²⁺ and Zn²⁺ and the catalytic effects of both parent and metal loaded catalysts were tested by thermogravimetric method. The cat...

The Water Framework Directive aims at reaching the good ecological status of the surface and ground water bodies (László et al. Microchem J 85(1):65–71, 2007). The paper deals with quality evaluation of waters with special focus on the water chemistry parameters as defined in the Water Framework Directive and pertaining legal regulations. The purpo...

The surface modifications fundamentally influence the morphology of kaolinite nanostructures as a function of crystallinity and presence of contaminants. Beside morphology, the catalytic properties of 1:1-type exfoliated aluminosilicates are also influenced by the presence of defect sites that can be generated in a controlled manner by mechanochemi...

Surface modification of the halloysite–10 Å mineral with tubular morphology can be achieved by slightly modified procedures developed for the delamination of kaolinite minerals. The resulting delaminated halloysite nanoparticles have unexpected surface/morphological properties that display, new potentials in catalyst development. In this work, a fo...

During the last decade of the 20 th Century, oil spill pollution has become an essential area of concern on account of its serious environmental impacts and to such an extent of the pollution that it poses a universal threat, therefore, surface water spill or subsurface leakage of petroleum products has been of concern to many industries and govern...

Comparée à la déshydrogénation simple, la déshydrogénation oxydante (DHO) des alcanes légers représente une alternative attractive pour la production des alcènes [1]. Des catalyseurs à base de phosphates de fer ont déjà été étudiés dans la DHO de l'éthane [2]. Les différents phosphates ont tendance à se transformer pendant la réaction catalytique d...

A0.2Zn0.8Fe2O4 ferrites with A = Co, Ni and Cu were successfully prepared by co-precipitation followed by annealing at 650 °C. They were characterized by using XRD, EDX, BET, FTIR, RDS, electrical conductivity, Current-Potential, Mott–Schottky and Nyquist techniques and their photo-catalytic properties were evaluated in hydrogen production through...

A series of SnO2-CeO2 powder mixed oxides (with 5, 10, and 20% wt SnO2) was prepared, characterized and used to study the sensing properties for CO, in absence of oxygen, using a CO-helium mixture. The results have shown that the SnO2-CeO2 powder has good response and recovery characteristics. This powder has better sensitivity to CO than pure SnO2...

This study presents the results of a geophysical survey undertaken by 2D electrical resistivity tomography (ERT) along two traverses. The study was conducted between an industrial park (IP) and a residential area bounding the Hoa Khanh Industrial Park, Da Nang, Vietnam. The first traverse, 300 m long, which is at the boundary between the industrial...

The environmental impact assessment has gained a very important role in decision making processes regarding different projects, investments, actions and proposals. The environmental impact assessment is a systematic process which deals with the consequences of the future developments in advance. The methodology of the assessment includes several te...

The alkylation of light hydrocarbons leads to produce the high octane number gasoline blending components. The homogeneous catalytic alkylation reaction is usually carried out at low temperature in the presence of H2SO4 and HF. The use of heterogeneous catalysis for this reaction is a promising solution for the replacement of hazardous acids to env...