20.500.12556/RUL-139919 Vpliv pH na desorpcijo nanodelcev adsorbiranih na mikroplastiki The effect of pH on desorption of nanoparticles adsorbed on microplastics Izraz mikroplastika zajema obširno skupino plastičnih delcev različnih oblik in materialov v velikostih od 1 μm do 1000 μm. Mikroplastika prihaja v okolje iz različnih virov, izmed katerih so med najpomembnejšimi odpadne vode. V odpadnih vodah se lahko na mikroplastiko adsorbirajo različna onesnaževala, med drugim tudi nanodelci. Adsorbirani nanodelci se lahko nato skupaj z mikroplastiko prenašajo prek dolgih razdalj zaradi njene visoke plovnosti. Ker njuna interakcija še ni dobro raziskana, je bil namen diplomskega dela preučiti, kakšen vpliv ima pH na izluževanje nanodelcev adsorbiranih na mikroplastiki. Kot modelno mikroplastiko smo uporabili polietilenske fragmente, ki so zelo razširjeni v vodnem okolju, in nanodelce TiO2 in ZnO, ki sodijo med najpogosteje uporabljene kovinske nanodelce. Izluževanje nanodelcev iz mikroplastike je potekalo pri pH vrednostih 6 in 8. Rezultati so pokazali, da pH nima pomembnega vpliva na desorpcijo in da lahko kinetiko desorpcije opišemo z modelom psevdo-drugega reda. Microplastics are a large group of plastic particles of different shapes and materials, ranging in size from 1 μm to 1000 μm. Microplastics enter the environment from a variety of sources, but one of the most important sources is wastewater. In wastewater, various pollutants, including nanoparticles, can adsorb to microplastics. Microplastics with adsorbed nanoparticles can then be transported on long distances, because microplastics can easily float. As their common fate is not yet well understood, the aim of this thesis was to investigate the effect of pH on the leaching of nanoparticles adsorbed on microplastics. We used polyethylene fragments as a model of microplastics, which are common in the aquatic environment. Nanoparticles used in this study were TiO2 and ZnO because they are one of the most commonly used metal nanoparticles. The leaching of the nanoparticles from the microplastics was carried out at pH values of 6 and 8. The results showed that pH has no effect on desorption and the kinetics of desorption can be described by a pseudo-second order model. desorpcija mikroplastika nanodelci pH desorption microplastics nanoparticles pH true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-08 12:05:00 2022-09-08 12:05:02 2022-11-10 12:00:13 0000-00-00 00:00:00 2022 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 21581 128810499 Likeb_Tjasa_-_Vpliv_pH_na_desorpcijo_nanodelcev_adsorbiranih_na_mikroplastiki.pdf Likeb_Tjasa_-_Vpliv_pH_na_desorpcijo_nanodelcev_adsorbiranih_na_mikroplastiki.pdf 1 B2F5E10A0A4EFA3F64442F1B3CFEA847 79a6f09f6e07a705b73f2a60a32dbd902f2d117a7607c3de0c63a09aabf345a2 a71d7303-2f5d-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=160565 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0