20.500.12556/RUL-143393 Laser-based techniques novel tools for the identification and characterization of aged microplastics with developed biofilm Microplastics found in the environment are often covered with a biofilm, which makes their analysis difficult. Therefore, the biofilm is usually removed before analysis, which may affect the microplastic particles or lead to their loss during the procedure. In this work, we used laser-based analytical techniques and evaluated their performance in detecting, characterizing, and classifying pristine and aged microplastics with a developed biofilm. Five types of microplastics from different polymers were selected (polyamide, polyethylene, polyethylene terephthalate, polypropylene, and polyvinyl chloride) and aged under controlled conditions in freshwater and wastewater. The development of biofilm and the changes in the properties of the microplastic were evaluated. The pristine and aged microplastics were characterized by standard methods (e.g., optical and scanning electron microscopy, and Raman spectroscopy), and then laser-induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) were used. The results show that LIBS could identify different types of plastics regardless of the ageing and major biotic elements of the biofilm layer. LA-ICP-MS showed a high sensitivity to metals, which can be used as markers for various plastics. In addition, LA-ICP-MS can be employed in studies to monitor the adsorption and desorption (leaching) of metals during the ageing of microplastics. The use of these laser-based analytical techniques was found to be beneficial in the study of environmentally relevant microplastics. microplastics identification characterization aging biofilm detection spectroscopic methods mikroplastika identifikacija karakterizacija staranje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-12-19 08:49:44 2022-12-19 08:49:44 2023-02-21 14:02:23 0000-00-00 00:00:00 2023 0 0 9 str. art. 137373 Vol. 313 Feb. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 504.5:678:544.53 0045-6535 10.1016/j.chemosphere.2022.137373 132028419 1-s2.0-S0045653522038668-main.pdf 1-s2.0-S0045653522038668-main.pdf 1 62B5EB880289E8531CC2BE91CCCB7066 6d624f3ffcebc05362b2f53055652d51d1aed63293087e082222e830aa1c1981 a34abfe7-7f72-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165044 https://www.sciencedirect.com/science/article/pii/S0045653522038668 1 856edfce-7f71-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165043 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0