A5032036167- Adsorption and biosorption for pollutant removal
- Heavy metals in environment
- Concrete and Cement Materials Research
- Recycling and utilization of industrial and municipal waste in materials production
- Electrochemical Analysis and Applications
- Clay minerals and soil interactions
- Extraction and Separation Processes
- Metal Extraction and Bioleaching
- Coal and Its By-products
- Mine drainage and remediation techniques
- Analytical Chemistry and Sensors
- Microplastics and Plastic Pollution
- Nanoparticles: synthesis and applications
- Nuclear materials and radiation effects
- Education, Psychology, and Social Research
- Various Chemistry Research Topics
- Nonlinear Dynamics and Pattern Formation
- Grouting, Rheology, and Soil Mechanics
- Building materials and conservation
- Inorganic and Organometallic Chemistry
- Crystallization and Solubility Studies
- Chemical Synthesis and Characterization
- Wastewater Treatment and Reuse
- Radioactive element chemistry and processing
- Minerals Flotation and Separation Techniques
Matej Bel University
2001-2024
Comenius University Bratislava
1992-1995
In this study, the removal of nickel (Ni(II)) by adsorption from synthetically prepared solutions using natural bentonites (Lieskovec (L), Hliník nad Hronom (S), Jelšový Potok (JP), and Stará Kremnička (SK)) was investigated. All experiments were carried out under batch processing conditions, with concentration Ni(II), temperature, time as variables. The process fast, approaching equilibrium within 30 min. Langmuir maximum capacities four bentonite samples used found to be 8.41, 12.24,...
In the present research, removal of zinc from concentrated galvanic wastewater (pH 3.1, conductivity 20.31 mS/cm, salinity, 10.16 g/L, Chemical Oxygen Demand (COD) 2900 mg O2/L, Total Organic Carbon (TOC) 985 mg/L, (Zn) 1534 mg/L and ethylenediaminetetraacetic acid (EDTA) 70 mg/L) by combination lime (Ca(OH)2) sodium trithiocarbonate (Na2CS3) as precipitation agents is studied. Central Composite Design (CCD) response surface methodology (RSM) were applied for modelling optimizing designed...
Abstract Thermochemical conversion of garden waste to biochar was carried out prepare a green adsorbent for the removal Cs, Cu, Ni, and Pb, which characterized by XPS, SEM–EDX, FT-IR analyses. The biocharˊs adsorption capacity 20.5(Cs), 25.2(Cu), 12.4(Ni), 45.9(Pb) mg g −1 demonstrated satisfactory performance different pH values. kinetics data evaluation revealed that besides chemisorption, intraparticle diffusion contributes metal removal. Moreover, physical structural properties play an...
The study of Cu(II) from aqueous solutions using the adsorption process on synthetically modified geopolymers was performed under static conditions. Three (based metaphase Serbian clay, German clay and plus 10% carbon cloth) were used. made by condensing a mixture metaphases alkali activator solution at fixed ratio room temperature then 60 °C in dry oven. Then, geopolymer samples pre-crashed to fixed-radius size. Their properties characterized X-ray diffractometry (XRD), Diffuse Reflectance...
The purpose of this investigation is to investigate the hydrophobicity geopolymers, new alumino-silicate materials and influence Si/Al ratio on their surface properties. Contact angle measurement (CAM) as reliable indicator was determined for synthesized geopolymers using water ethylene-glycol reference liquids. Geopolymers were from various precursors: kaolin, bentonite diatomite. Characterization phase structure microstructure performed by XRD, FTIR, SEM/EDX methods. measurements confirmed...
Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph GPMD shows a homogeneous surface with some longitudinal cavities in the gel, it is significantly different micrographs other two geopolymer samples, GPMB GPMK. considerable amount unreacted particles, as well presence pores matrix GPMK GPMD, indicate an...
The removal of Pb(II) ions from synthetically prepared solutions by different low-cost adsorbents (waste polyurethane foam, Slovak bentonite, and zeolite) was investigated. adsorption experiments were carried out under a batch process with the concentration ions, amount adsorbent, pH, time as variables. Adsorption strongly dependent on pH medium, uptake increasing increased 1.5 to 5.0, after which could not be continued due decreasing solubility Pb(II). very fast at low coverage, equilibrium...
This article reports the results of a study concerning contamination dump-fields by potentially toxic elements at five abandoned copper mines: Ľubietová, Špania Dolina (Slovakia), Libiola, Caporciano (Italy) and São Domingos (Portugal). paper offers an updated description soil individual deposits indicates possible solution derived environmental problems. Contamination technosoils PTEs shows irregular spatial distribution Fe, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Sb Pb. Contents often exceed both...
The removal of Cu (II) ions from aqueous solutions using the adsorption process onto natural Slovak bentonites deposits Jelšový potok, Hliník nad Hronom and Lieskovec has been investigated in this study. experiments were carried out under batch with initial concentration ions, time temperature as variables. A flame atomic absorption spectrometer was used for measuring copper before after adsorption. Adsorption very fast at low coverage equilibrium approached within 30 min. results best...
Article A Transition-Metal Oscillator Based on the Oxidation of Mn2+ Ions by Hydrogen Peroxide was published January 1, 1995 in journal Zeitschrift für Physikalische Chemie (volume 189, issue 1).
Rules governing the hydrodynamic oscillator were studied with a view to using it in examination of coupling two different chemical oscillators, periodical perturbation oscillatory system, or initiation oscillations by self-regulating addition one reactant other. The can be employed study complex dynamic behaviour oscillators provided that liquids used are not too viscous vessel without capillary is order maximally reduce effect viscosity.