20.500.12556/RUL-138400 An extensive characterization of various environmentally relevant microplastics – material properties, leaching and ecotoxicity testing Microplastics in the environment occur in different sizes and shapes and are made of various polymers. Therefore, they also considerably differ in their properties and ecotoxicity. However, the majority of microplastics research uses pre-made spherical microplastics, which practically do not exist in the environment. Our work focused on a comprehensive study of six different types of microplastic that were prepared to simulate common microplastics found in the environment. All types of microplastics where chemically and physically characterized using Fourier-transform infrared spectroscopy, thermal analysis, field-emission scanning electron microscopy, optical microscopy and laser diffraction analysis. The specific surface area was determined using the BET method. Furthermore, effects of microplastics and microplastic leachates on a common duckweed (Lemna minor) were evaluated. All tested microplastics did not affect specific growth rate and chlorophyll a content in duckweed, while microplastics with a rough surface and sharp edges caused a significant reduction of duckweed root length. Microplastics made of Bakelite also showed an intensive leaching, which increased their ecotoxicity potential. Natural particles used as a control did not have any negative effect on duckweed. Overall, microplastic particles have significantly different ecotoxicity profiles depending on their physico-chemical properties. Therefore, the testing of environmentally relevant particles and their proper characterization, as well as the testing of microplastic leaching properties, is crucial for understanding of microplastics ecotoxicological potential. freshwaters duckweed leachate macrophytes microplastics vascular plants površinske vode mala vodna leča izlužki makrofiti mikroplastika vaskularne rastline true false true Angleški jezik Slovenski jezik Članek v reviji 2022-07-19 16:24:22 2022-07-19 16:24:23 2022-09-15 04:16:43 0000-00-00 00:00:00 2021 0 0 10 str. Vol. 773, art. 145576 15 Jun. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 504.5:678:628.1 0048-9697 10.1016/j.scitotenv.2021.145576 50576643 1-s2.0-S0048969721006446-main.pdf 1-s2.0-S0048969721006446-main.pdf 1 E556714186FDD3075C335F44B2ED64B4 7aa9260fc5369a8394caf37199b92753923062461c7c42e838aeae03aee76172 598210c1-076f-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158712 https://www.sciencedirect.com/science/article/pii/S0048969721006446 1 3d7f4fa0-076e-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158709 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0