Is the oxidative potential of components of fine particulate matter surface-mediated?

Autor: Baumann K; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.; Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, USA.; Picarro Inc, Santa Clara, USA., Wietzoreck M; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Shahpoury P; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.; Air Quality Processes Research Section, Environment and Climate Change Canada, Toronto, Canada.; Chemistry Department, Trent University, Peterborough, Canada., Filippi A; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Hildmann S; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Lelieveld S; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Berkemeier T; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Tong H; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.; Institute of Surface Science, Helmholtz-Zentrum Hereon, Geesthacht, Germany., Pöschl U; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany., Lammel G; Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany. g.lammel@mpic.de.; Research Centre for Toxic Compounds in the Environment, Masaryk University, Brno, Czech Republic. g.lammel@mpic.de.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Feb; Vol. 30 (6), pp. 16749-16755. Date of Electronic Publication: 2022 Dec 23.
DOI: 10.1007/s11356-022-24897-3
Abstrakt: Redox-active substances in fine particulate matter (PM) contribute to inhalation health risks through their potential to generate reactive oxygen species in epithelial lung lining fluid (ELF). The ELF's air-liquid interface (ALI) can play an important role in the phase transfer and multi-phase reactions of redox-active PM constituents. We investigated the influence of interfacial processes and properties by scrubbing of coated nano-particles with simulated ELF in a nebulizing mist chamber. Weakly water-soluble redox-active organics abundant in ambient fine PM were reproducibly loaded into ELF via ALI mixing. The resulting oxidative potential (OP) of selected quinones and other PAH derivatives were found to exceed the OP resulting from bulk mixing of the same amounts of redox-active substances and ELF. Our results indicate that the OP of PM components depends not only on the PM substance properties but also on the ELF interface properties and uptake mechanisms. OP measurements based on bulk mixing of phases may not represent the effective OP in the human lung.
(© 2022. The Author(s).)
Databáze: MEDLINE
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