Vpliv pH na desorpcijo nanodelcev adsorbiranih na mikroplastiki

Likeb, Tjaša (author), Kalčikova, Gabriela (mentor)

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.

• Language: Slovenian
• Keywords: desorpcija, mikroplastika, nanodelci, pH
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2022
• PID: 20.500.12556/RUL-139919
• COBISS.SI-ID: 128810499
• Publication date in RUL: 08.09.2022

LIKEB, Tjaša, 2022, Vpliv pH na desorpcijo nanodelcev adsorbiranih na mikroplastiki [online]. Bachelor’s thesis. [Accessed 24 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=139919

Secondary language

• Language: English
• Title: The effect of pH on desorption of nanoparticles adsorbed on microplastics

Abstract

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.

• Keywords: desorption, microplastics, nanoparticles, pH