Extrakce huminových kyselin a jejich vliv na obsah mikropolutantů v odpadní vodě

Abstract

The thesis deals with the extraction of humic acids (HA) and its effect on the micropollutant content in wastewater. The aim was to extract humic acids from different types of materials, to characterize them (by TGA, EA, FTIR, XRF) and to test their interaction with selected micropollutants (paracetamol, caffeine and metazachlor). The concentration of micropollutants was determined by HPLC or HPLC-MS methods. Raw materials from which HA were extracted were peat, lignite, compost and sewage sludge. The extraction was carried out in two ways, either by aqueous NaOH or piperidine solution. The highest yields of HA were obtained from lignite and peat, the lowest from sludge. The pesticide metazachlor showed the highest increase in concentration after interaction with HA. Pharmaceuticals exhibited weaker interactions, especially with HA extracted from sludge. This is most likely due to the saturation of the HA by the pharmaceuticals present in the wastewater.