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Removing of organic dyes from water using polyacrylamide hydrogel nanocomposites
Špalová, Anna ; Klusoň, Petr (advisor) ; Krystyník, Pavel (referee)
The unavailability and pollution of water resources have become significant global challenges. Hydrogels composed of cross-linked polymers have emerged as advanced adsorbents for wastewater treatment, owing to their convenient handling and high efficiency. By incorporating appropriate components into the hydrogel structure, the affinity of a specific pollutant to the hydrogel can be modified. Consequently, the resulting hydrogel nanocomposite can display enhanced adsorption capacity, specific selectivity, and other desirable properties. In this thesis, the efficiency of polyacrylamide hydrogel nanocomposites in the removal of organic dyes from water was investigated. Various composites were synthesized, incorporating graphene, kaolin, and laponite. The composition of these composites varied, employing different ratios of monomer to water and monomer to additive. The physicochemical properties of the synthesized hydrogels and their nanocomposites were examined. It was observed that the nanocomposites displayed reduced water-holding capacity compared to pure polyacrylamide hydrogels. The inclusion of additives led to a decrease in nanocomposite rigidity for graphene, minimal alteration in the case of kaolin, and an increase in rigidity for laponite. The compressibility modulus of the samples ranged...
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Sorbents for Phenol Removal from Contaminated Waters
Papežová, Barbora ; Hanika, Jiří ; Matějková, Martina ; Šolcová, Olga
Nowadays, contamination of underground and surface water by various pollutants is serious environmental problem. Phenol and phenolic compounds belong to the most common organic pollutants. Huge sources of contamination are industrial waste waters (from chemical, rubber, pharmaceutical, petrochemical and other industry), which are necessary to purify. Various techniques (oxidation, enzymatic purification, sorption, photocatalysis, or their combination) are used for water treatment. This study is focused on suitable technique for phenolic compounds removal from contaminated waters.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22014092610400 - PDF
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Photocatalytic Degradation of Bisphenol A
Spáčilová, Lucie ; Maléterová, Ywetta ; Cajthaml, Tomáš ; Šolcová, Olga
Bisphenol A belongs to the group of the environmental estrogens that act as the hormonal system of the body. It is one of the most representative endocrine disruptors in wastewater. Bisphenol A gets into rivers from the production of polycarbonate, respectively, from the processing thereof. More than 75% of the Czech polycarbonate consumption is concentrated in three key economic sectors: automotive, construction, electronics and electrical industry.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013102415320 - PDF
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