Bioflocculation and coagulation pathways for the removal of polystyrene nanoparticles by alginate and starch in the presence of Ca2+ and Mg2+ salts
Artykuł w czasopiśmie
MNiSW
200
Lista 2024
| Status: | |
| Autorzy: | Gołębiowska Katarzyna, Bastrzyk Anna, Celny Anna, Mendrek Barbara, Kowalczuk Agnieszka, Matusiak Jakub, Grządka Elżbieta |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 527 |
| Numer artykułu: | 171907 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The widespread presence of nanoplastics (NPs) in aquatic systems poses significant ecological and human health risks, necessitating efficient and environmentally friendly remediation approaches. This study investigates the removal of model polystyrene nanoparticles (PS-NPs) using a coagulation–flocculation–sedimentation (CFS) process based on natural bioflocculants: alginic acid (AA) and cationic starch (CS), in the presence of calcium and magnesium salts (CaCl₂, MgCl₂) as coagulants PS-NPs were formed from branched polystyrene synthesized via atom transfer radical polymerization (ATRP) to obtain additive-free nanoparticles with controlled size and morphology. The synthesized PS-NPs and resulting flocs were characterized using NMR, GPC-MALLS, FT-IR, DLS, SEM, TEM, and XPS techniques. Flocculation performance was assessed through UV–Vis spectrophotometry, turbidimetry, zeta potential, and adsorption studies. The highest removal efficiency was achieved for the AA/CaCl₂ system (~80 %, 1 h), and was attributed to ionic bridging and the formation of “egg-box” alginate-Ca2+ networks. In contrast, CS exhibited strong surface adsorption via electrostatic and cation-π interactions resulting in lower overall removal efficiency due to colloidal restabilization at higher doses. The coagulant type and ionic strength significantly influenced aggregation kinetics and floc structure. These findings demonstrate that natural polysaccharides combined with environmentally benign coagulants can provide a fast, scalable, and sustainable solution for nanoplastic remediation. The proposed CFS approach aligns with green chemistry principles and offers a promising route for the treatment of nanoparticle-contaminated waters. |
