| Abstract [eng] |
In recent years, there has been an increasing focus on water pollutants and their removal. This was due to the negative effects of pollutants on human and wildlife health and the increasing amount of micro-pollutants. Amongst the biggest challenges in water treatment is to create systems that clean pollutants efficiently. One of the possible water purification methods is the photocatalytic decomposition of pollutants, therefore master's thesis analyzed advanced oxidation methods that do not require additional reagents. The aim of the study was to evaluate the influence of the photocatalysts formation conditions on their physicochemical properties and photocatalytic decomposition of persistent organic pollutants in water. The research objectives: to review the scientific literature and to prepare a plan of experimental research; to synthesize and characterize TiO2-based photocatalysts by the sol-gel method under different conditions; to investigate the efficiency of catalysts suspended on stainless steel plates prepared under different conditions; to evaluate the influence of catalyst calcination temperature, concentration, number of layers on the decomposition of POT in water; to select the optimal conditions for the preparation of a TiO2-based photocatalyst. During this study the influence of the number of layers, temperature and concentration on the catalyst was taken into consideration. In order to apply the catalyst in practice, the optimal catalyst concentration is 0.6 M, three layers, heated at a temperature of 500 ºC. In these conditions the purification efficiency of such catalyst is 96%. |
