02490nas a2200289 4500008004100000022001400041245012900055210006900184300001100253490000800264520159600272653000701868653000701875100002101882700002201903700002201925700001601947700001901963700001801982700002202000700002502022700001502047700002102062700001802083700002702101856007202128 2023 eng d a0045-653500aLaser-based techniques: Novel tools for the identification and characterization of aged microplastics with developed biofilm0 aLaserbased techniques Novel tools for the identification and cha a1373730 v3133 a

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.

10aBF10aMF1 aPořízka, Pavel1 aBrunnbauer, Lukas1 aPorkert, Michaela1 aRozman, Ula1 aMarolt, Gregor1 aHolub, Daniel1 aKizovský, Martin1 aBenešová, Markéta1 aSamek, Ota1 aLimbeck, Andreas1 aKaiser, Jozef1 aKalčíková, Gabriela uhttps://www.sciencedirect.com/science/article/pii/S0045653522038668
Warning: Cannot modify header information - headers already sent by (output started at /var/www/docs_drupal/includes/common.inc:2777) in /var/www/docs_drupal/includes/bootstrap.inc on line 1486
Chyba | Ústav přístrojové techniky

Chyba

Chybová zpráva

Recoverable fatal error: Argument 1 passed to xmlsitemap_node_create_link() must be an instance of stdClass, boolean given, called in /var/www/docs_drupal/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module on line 28 and defined ve funkci xmlsitemap_node_create_link() (řádek: 194 v souboru /var/www/docs_drupal/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module).
Na stránce došlo k neočekávané chybě. Zkuste to později.