| Abstract [eng] |
Pollution of surface and ground water with heavy metals is recognized as an important environmental problem, causing danger to life and health, and occupies one of the leading places among other ecological problems, such as: pesticides, acid rain, oil spills, chemical fertilizers. Heavy metals are persistent pollutants that accumulate in the earth's crust, rocks, soil, water, atmosphere, and biosphere, and in some cases, they can accumulate from natural or anthropogenic sources, but cannot be removed naturally. Therefore, one of the ways to remove metals from the environment is to adsorb them using synthetic or natural adsorbents, but the use of materials of natural origin in adsorption processes is limited by the non-uniformity of the properties of these compounds. Currently, it is recognized that the produced special purpose adsorbents are more effective because the texture, structure and properties of these materials can be controlled by changing the synthesis conditions. The dissertation is intended to investigate the adsorption kinetic parameters of Cu2+, Co2+ and Cr3+ ions, their thermal stability and catalytic activity of samples of synthesized calcium hydrosilicates (CaO/SiO2 = 1.5) with poorly-ordered and well-ordered structure. In the dissertation, the adsorption capacity of synthesized calcium hydrosilicate samples for Cu2+, Co2+ and Cr3+ ions was calculated, the thermal stability of synthetic adsorbent samples with interspersed metal ions was investigated in the temperature range of 25-1000 °C, and the possibility of using these samples in the production of adsorbents/catalysts was determined. |
