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.
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