Polystyrene Nanoplastic Behavior and Toxicity on Crustacean Daphnia magna: Media Composition, Size, and Surface Charge Effects

Concerns about the possible ecotoxicological implications of nano-sized plastic materials in freshwater environment are growing with increasing use materials. The present study focuses on behavior and effects amidine-functionalized polystyrene (NPLs) 20, 40, 60, 100-nm-size freshwaters different synthetic media. Daphnia magna was exposed to concentrations from 0.5 30 mg/L (and 100 for 100-nm-sized NPLs). results revealed no significant aggregation ultra-pure water, culture media, water. In presence natural organic matter, NPLs 20 40 nm displayed better stability both whereas a 60 PS found. All studied size between exhibited acute toxicity D. magna. observed 48-h immobilization strongly depended primary NPLs, 40-nm-size inducing stronger effect Water quality variables such as pH, cation anion composition, DOC were secondary importance. confirmed sizes crustaceans media demonstrated importance NPLs.