Vezava nanoplastike polistirena na nanoligninske delce

Lesinšek, Neja (author), Iskra, Jernej (mentor)

V diplomskem delu sem raziskovala interakcije med ligninskimi nanodelci (LNP) in nanoplastiko iz polistirena (nano PS). Iz biomase mlete slame sem izolirala tri različne vrste lignina: kraft, organosolv in lignosulfonat. Raziskala sem pripravo nanodelcev iz vseh treh vrst lignina, pri čemer sem za modelno študijo interakcij izbrala LNP organosolv lignina s spiranjem (LNP-S). Za študijo interakcij sem uporabila sintetizirano nano PS (hitrost mešanja 800 rpm). Velikost delcev in stopnjo agregacije v suspenzijah LNP-S in nano PS pri različnih pH vrednostih sem določila z uporabo metode dinamičnega sipanja svetlobe (DLS). Pri pH 2 sem opazila najbolj izrazito agregacijo delcev, kar nakazuje na interakcije med LNP-S in nano PS. Rezultati potrjujejo, da pH okolja pomembno vpliva na obnašanje LNP in njihovo sposobnost interakcije z delci nanoplastike, kar predstavlja pomemben korak k razumevanju njihovih potencialnih interakcij v naravi.

• Language: Slovenian
• Keywords: Nanoligninski delci, mikroplastika, nanoplastika, interakcije
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2025
• PID: 20.500.12556/RUL-176576
• COBISS.SI-ID: 260023811
• Publication date in RUL: 04.12.2025

Secondary language

• Language: English
• Title: Binding of nanoplastics of polystyrene to nanolignin particles

Abstract

In this thesis, I investigated the interactions between lignin nanoparticles (LNP) and polystyrene nanoplastics (nano PS). I isolated three different types of lignin from milled straw biomass: kraft, organosolv, and lignosulfonate. I investigated the preparation of nanoparticles from all three types of lignin, and for the model study of interactions, I selected LNP from organosolv lignin with a washing (LNP-S). For the interaction study, I synthesized nano PS (at a mixing speed of 800 rpm). The particle size and degree of aggregation in LNP-S and nano PS suspensions at different pH values were determined using dynamic light scattering (DLS). At pH 2, I observed the strongest particle aggregation, indicating interactions between LNP-S and nano PS. The results confirm that the environmental pH significantly affects the behavior of LNP and their ability to interact with nanoplastic particles, representing an important step toward understanding their potential interactions in natural environment.

• Keywords: Nanolignin particles, microplastic, nanoplastic, interaction