20.500.12556/DiRROS-20522 Comparing the effects of pristine and UV–VIS aged microplastics behavioural response of model terrestrial and freshwater crustaceans Physico-chemical properties of microplastics (MPs) change during weathering in the environment. There is a lack of knowledge about the effects of such environmentally relevant MPs on organisms. We investigated: 1) the physico-chemical changes of MPs due to UV–VIS weathering, and 2) compared the effect of pristine and aged MPs on the behaviour of the water flea Daphnia magna and terrestrial crustacean Porcellio scaber. Dry powders of MPs were produced from widely used polymer types: disposable three-layer polypropylene (PP) medical masks (inner, middle and outer), polyester textile fibres, car tires and low-density polyethylene (LDPE) bags and were subjected to accelerated ultraviolet–visible (UV–VIS) ageing. Our results show that the extent of transformation depends on the type of polymer, with PP showing the most changes, followed by LDPE, textile fibres and tire particles. Obvious fragmentation was observed in PP and textile fibres. In the case of PP, but not polyester textile fibres, changes in FTIR spectra and surface properties were observed. Tire particles and LDPE did not change in size, but clear changes were observed in their FTIR spectra. Most MPs, aged and pristine, did not affect the swimming of daphnids. The only effect observed was a significant increase in path length and swimming speed for the pristine tire particles when the recording was done with particles remaining in the wells. After transfer to a clean medium, this effect was no longer present, suggesting a physical rather than chemical effect. Similarly, woodlice showed no significant avoidance response to the MPs tested, although there was a noticeable trend to avoid soils contaminated with pristine polyester textile fibers and preference towards the soils contaminated with aged MP of the middle mask layer. Overall, the apparent changes in physico-chemical properties of MPs after accelerated ageing were not reflected in their effects on woodlice and daphnids. Daphnia magna Porcellio scaber polyethylene polypropylene weathering FTIR vodna bolha Daphnia magna navadni prašiček Porcellio scaber polietilen polipropilen staranje FTIR true false true Academic Press. Angleški jezik Slovenski jezik Neznano 2024-10-08 07:33:37 2024-10-08 08:03:40 2024-10-09 03:35:15 0000-00-00 00:00:00 2024 0 0 str. 1-12 [article no.] 117020 Vol. 285 Oct. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-09-13 504 0147-6513 10.1016/j.ecoenv.2024.117020 207586051 https://www.sciencedirect.com/science/article/pii/S0147651324010960 1 df96646b-8536-11ef-a5bf-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28934 RAZ_Zidar_Primoz_2024.pdf RAZ_Zidar_Primoz_2024.pdf 1 8E0FB89E03EAF3055761BFC86250CC01 bc7e7fbb1c0ca4c1c05aad4c46eff54b8de3b1c4889f5fffb87bbb6e261c9a29 e6900468-853a-11ef-a5bf-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28937 RAZ_Zidar_Primoz_2024.docx RAZ_Zidar_Primoz_2024.docx 1 11592BE013D394E5A751DE3E4C99773C 2f7ffe2658b8cd3524c8e901fd39ebf4ee1cf92147aa8467163f52cbeb5ed576 fd7fef2f-853a-11ef-a5bf-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28938 Zavod za gradbeništvo Slovenije 0 0 0