Direct visualization of pyrene diffusion in polyethylene and polyoxymethylene passive samplers.

ABSTRACT: While passive sampling of ultra-low aqueous concentrations of hydrophobic organic compounds in environmental aqueous media has emerged as a promising analytical technique, there is a lack of good understanding of the fundamental diffusive processes. In this research, we used a fluorophore, pyrene, as a model compound to track diffusion in polymers through absorption and environmental media exchange processes. We directly tracked the penetration of pyrene into polyethylene (PE) and polyoxymethylene (POM) rods during absorption from water by sectioning the rod after different stages of absorption and observing the fluorescence signal through a microscope. Diffusion profiles of pyrene in polymers were simulated by numerical integration of Fickian diffusion. The results indicated that the upta

SUBMITTER: Jalalizadeh M 

PROVIDER: S-EPMC11091960 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature