Publications by authors named "D Sternik"
New hybrid hydrogel composites based on a mixture of natural polysaccharides (sodium alginate, κ-carrageenan, and chitosan) filled with the clay mineral of natural origin, montmorillonite (MMT), were studied. The structure of intercalated/flocculated MMT distribution in the interpenetrating network of polysaccharide matrix was characterized using FTIR, X-ray diffraction, and SEM techniques. Swelling kinetics was investigated using the weight analysis, whereas the phase transition of water in the composition of hybrid hydrogels, by DSC method.
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- A series of carbon-based nanocomposites were created by heating a resorcinol-formaldehyde polymer with metal oxide/silica nanocomposites, leading to different structural properties depending on the metal used (Mg, Mn, Ni, Cu, Zn).
- The synthesized materials exhibited mesoporous structures and showed significant variations in porosity and surface area based on the metal fillers, with nickel and copper enhancing graphitization and order.
- The resulting composites demonstrated effective adsorption capabilities for pollutants like p-chlorophenol and p-nitrophenol from water, highlighting their potential applications in environmental remediation.
Article Synopsis
- The study examines how the structure of carbon materials affects their ability to adsorb certain cationic dyes, including Basic Violet 3, Basic Red 1, and Basic Blue 9.
- Various techniques, such as scanning electron microscopy and nitrogen adsorption, were used to analyze the carbon's structure and surface properties.
- The results suggest that these carbons are effective adsorbents due to their uniform spherical shape and diverse pore sizes suitable for trapping larger dye molecules.
This paper deals with the adsorption of organic and inorganic pollutants on the surface of carbonaceous adsorbents prepared via the chemical activation of expired or broken food products-the solid residue of the "cola-type" drink as well as spoilt grains of white rice and buckwheat groats. The activation process was conducted in the microwave furnace with the use of two activating agents of different chemical nature-potassium carbonate and orthophosphoric acid. The activated carbons were characterized based on the results of elemental analysis, low-temperature nitrogen adsorption/desorption, Boehm titration, thermal analysis, and scanning electron microscopy.
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