Department Seminar of michal koclyarov - Degradation and Sorption Dynamics of PTFE Microplastics
School of Mechanical Engineering Seminar
Wednesday 8.11.2023 at 14:00
ZOOM SEMINAR
Degradation and Sorption Dynamics of PTFE Microplastics
Michal Kotlyarov
M.Sc. student of Dr. Ines Zucker
Since the 19th century, plastic has become one of the most dominant materials used globally due to its versatility, chemical and thermal resistance, lightweight nature, and cost-effective production. However, the plastic revolution has led to a significant increase in plastic waste worldwide, which eventually finds its way into rivers and oceans. In aquatic environments, plastics undergo slow degradation processes, including photodegradation by sunlight, fragmentation by waves, and thermal wear. These degradation procedures result in the formation of microplastics, which have major environmental implications. Such implications include microplastic role as sink and source of environmental pollutants (trace organic compounds) and potential toxic effect towards living forms.
Fluorine-containing polymers like polytetrafluoroethylene (PTFE) form the basis of some of the most stable and inert plastics available. Although PTFE is considered resistant to natural weathering, it can still degrade over time, during which it may act as a source and release harmful polyfluorinated alkyl substances (PFASs) or act as vectors for other co-existing toxic trace organic compounds, facilitating their accumulation in various biological organisms. In light of the recent evidence of PTFE presence in the environment and their potential to adsorb environmental chemicals like arsenic, there is a need to shed light on both degradation mechanisms and implications of PTFE in the aquatic environment.
This research aims to explore two critical environmental concerns: (i) the decomposition process of PTFE particles and the conditions driving it, and (ii) the sorption potential of trace organic compounds onto PTFE microparticles vs potential release of organic compounds from PTFE particles during weathering procedure. By understanding these processes, the study seeks to enhance risk assessments related to emerging fluorinated environmental contaminants and contribute to strategies for mitigating contamination to safeguard human sustainability and well-being.
https://tau-ac-il.zoom.us/j/86497933118
