A5048560412- Environmental remediation with nanomaterials
- Adsorption and biosorption for pollutant removal
- Radioactive element chemistry and processing
- Mining and Gasification Technologies
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Chemical Synthesis and Characterization
- Clay minerals and soil interactions
- Adsorption, diffusion, and thermodynamic properties of materials
- Electrokinetic Soil Remediation Techniques
- Environmental and Industrial Safety
- Arsenic contamination and mitigation
- Recycling and Waste Management Techniques
- Magnesium Oxide Properties and Applications
- Industrial Engineering and Technologies
- Water Quality Monitoring and Analysis
- Analytical chemistry methods development
- Radioactive contamination and transfer
- Engineering Technology and Methodologies
- Mine drainage and remediation techniques
- Nanomaterials for catalytic reactions
- Iron oxide chemistry and applications
- Pigment Synthesis and Properties
- Environmental Science and Water Management
- Recycling and utilization of industrial and municipal waste in materials production
- Landfill Environmental Impact Studies
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
2019-2024
National Polytechnic School
2009
A.V. Dumansky Institute of Colloid and Water Chemistry
2006
Silylation of clay minerals from Cherkasy deposit (Ukraine) montmorillonite (layer silicate) and palygorskite (fibrous was performed using organosilane (3-aminopropyl)triethoxysilane (APTES). Solvents with different polarity (ethanol, toluene) were used in synthesis. The structure modified characterized by complex methods (X-ray powder diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption-desorption at −196 °C thermal analysis). Studies adsorption characteristics...
Мікросфери діоксиду кремнію (SiO2) можуть бути використані в фармацевтичній, косметичній, харчовій галузях, виробництві покриттів та інших технологічних процесах. Тому, важливим завданням є пошук оптимальних параметрів для легкого синтезу монодисперсних мікросфер кремнезему з контрольованою структурою фізико-хімічними характеристиками. Метою роботи було вивчення впливу часу на формування контролю морфологічних властивостей їх поверхні. Синтез проводили методом лужного гідролізу...
The peculiarities of sorption removal uranium (VI) compounds from the surface and mineralized groundwater using clay-supported nanoscale zero-valent iron (nZVI) composite materials are studied. Representatives main structural types clay minerals taken as clays: kaolinite (Kt), montmorillonite (MMT) palygorskite (Pg). It was found that obtained samples sorbents have much better properties for waters compared to natural clays nZVI.It is shown in mainly anionic form, namely form carbonate...
The object of research is bentonite clays, the main rock-forming mineral which montmorillonite. This natural silicate exhibits sorption capacity for heavy metal ions due to its high cation exchange and specific surface area. One most problematic uses montmorillonite in processes ability swell aqueous media. greatly complicates separation spent sorbent from purified water. To eliminate this drawback, granulation often used, followed by heat treatment. Moreover, various polymer compounds are...
We studied the main physicochemical features of removing arsenate from contaminated waters utilizing stabilized nanoscale iron. An inorganic kaolinite matrix was used for stabilization. The structure adsorbents using some methods (X-ray powder diffraction and low-temperature N2 adsorption-desorption method). It found that efficiency removal arsenic (V) ions depends on weight ratio iron nanopowder to kaolinite, whereas it does not depend pH water systems in a wide range. Kinetics data were...
The development of effective sorbents based on cheap natural raw materials for water purification from synthetic organic dyes is an important environmental problem. It known that layered silicates are distinguished by mechanical strength, thermal and chemical resistance, high dispersion, ion exchange, availability low cost. However, the main disadvantage clays their insufficiently sorption capacity with respect to toxicants. Therefore, increase it, surface clay minerals modified various...
The development of granular, low-cost adsorbents represents an important environmental challenge. Natural clay minerals show promise in this area, as they exhibit adsorption capacity a range pollutants. Nevertheless, the high dispersion aluminosilicates limits their widespread use. To enhance processability these materials, are subjected to granulation using natural biopolymers, such sodium alginates. Concurrently, granules can be increased by application modifiers surface silicates,...
The object of research is synthesized dendritic mesoporous nanoscale silica (DMSN) modified with zero-valent iron (Fe0@DMSN). This material exhibits a high adsorption capacity for heavy metal ions, in particular copper, whose increased content the aquatic environment poses threat to living organisms. In this regard, main physicochemical features removal copper cations from aqueous medium using obtained sample were investigated. morphology silicas was studied by electron microscopy and...
The contamination of surface and groundwater with heavy metals represents a significant threat to environmental safety the health living organisms. Consequently, development new technologies improvement existing ones clean water bodies from toxicants various kinds an important task. One factors influencing choice treatment method is concentration pollutant. It advisable use adsorption methods for post levels maximum permissible concentrations. In context implementation methods, selection...
The objects of the study are sorption materials based on commercial silica gel and nickel (II) oxide with different mass ratios NiO to SiO2: 1:1 0.5:1. To obtain such materials, expensive reagents complex synthesis schemes not required. In addition, they distinguished by chemical stability, controlled morphology have a significant number reactive functional groups, which contributes high adsorption capacity for various types contaminants. composite sorbents was studied using electron...
The object of research is palygorskite – a natural clay mineral with layered ribbon structure. It characterized by high specific surface area, secondary porosity and sorption capacity for metal cations. However, due to the negative charge surface, inefficient when cleaning water from pollution that in anionic form, particular, arsenic compounds. A significant drawback use dispersed aluminosilicates as sorbents difficulty their separation liquid phase after process purification. Therefore,...
Surface modifiсation of clay minerals from Cherkasy deposit (Ukraine) montmorillonite (layer silicate) and palygorskite (fibrous was performed using the cationic surfactant hexadecyltrimethylammonium bromide (HDTMA). The successful modification surface clays after treatment with HDTMA confirmed by X-ray analysis IR-spectra. ζ-potential measurements organo-clays showed even a zeta potential reversion negative to positive in whole acidic pH range. In this case, adsorbed molecules can form both...
We have investigated the physicochemical features of purification wastewater that are complex on its content and include a mixture heavy metal ions (Cu(II), Cd(II), Zn(II), Co(II), Cr(VI)). The phase composition structural-sorption characteristics synthesized nano-sized Fe0/kaolinite composites were studied. It was found obtained materials much better sorption properties for extraction metals from aqueous solutions in comparison with natural kaolinite. Calculations isotherms according to...
The object of this study is granular adsorbents based on kaolinite and zero-valent iron. ceramic mass for their preparation contained polyvinyl alcohol as a powder-forming additive. It was established that its addition in quantities 1.8–3.3 % practically does not change the porosity granules but increases strength. X-ray phase chemical analyzes confirmed presence layer iron surface granules. structural sorption characteristics materials have been studied calculations main parameters porous...
Background. Obtaining sorption materials based on natural raw for water purification from pollution by heavy metal ions is an urgent task of our time. Composites with zero-valent iron nanoparticles immobilized the surface clay minerals show rather high properties concerning some metals. However, there are only a few proceedings devoted to physicochemical substantiation wastewater treatment processes containing complex mixture such pollutants. Objective. The purpose paper study regularities...
Досліджено особливості сорбційного вилучення важких металів (Cu(II), Cd(II), Zn(II), Co(II), Cr(VI)) зі складних за вмістом стічних вод, що містять суміш цих іонів, композитом на основі нанорозмірного заліза з використанням високоактивного дисперсного мінералу монтморилоніту як неорганічної матриці. Отримано залежності величин сорбції від рН. На моделей поверхневого комплексоутворення (модель дифузного подвійного шару (DDLM)) кількісно описано процеси сорбції. За селективністю досліджені...
КПІ ім
The object of research is kaolin from the Hlukhovetsky deposit (Ukraine). On its basis, granulated sorbent materials were obtained with addition various amounts cellulose as a pore former. After forming samples, they dried and fired at temperature 800 °C. granules size 8–9 mm modified zero-valent iron. physicochemical, including sorption properties granular composites studied. Using scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDS), morphology samples was...
This article presents the results of a study on impact acid activation structure and surface properties kaolin. Hydrochloric with concentration 2.5 M was utilized in combination pre-heat-treated kaolin (metakaolin). We employed two methods chemical activation: without ultrasonic treatment. The temperature also varied during experiments (60°C 80°C). samples underwent characterization using X-ray diffraction (XRD), fluorescence (XRF), scanning electron microscopy energy-dispersive spectroscopy...
Reducing waste, including waste generated through environmentally protective processes, is a primary goal of the circular economy. It important to properly dispose promote sustainability and cleaner environment. This article considered disposal method for spent adsorbents using ceramic technology. The results indicate that addition adsorbent does not significantly reduce performance characteristics materials while providing an efficiency over 99% Cr (VI) retention in all experiments.