Litter addition potentially enhances volatile organic compound emission from a freshwater wetland

Atmospheric Environment, Journal Year: 2025, Volume and Issue: unknown, P. 121274 - 121274

Published: May 1, 2025

Language: Английский

Deposition of secondary organic aerosol in human lung model: Effect of photochemically aged aerosol on human respiratory system

Ecotoxicology and Environmental Safety, Journal Year: 2023, Volume and Issue: 265, P. 115497 - 115497

Published: Sept. 18, 2023

Ultrafine particles (UFP) of Secondary Organic Aerosol (SOA) penetrate deep into the human respiratory system and exert fatal effects on health. However, there is little data potential deposited doses UFP-generated SOA in tract. This study to estimate fraction aerosol deposition using a multiple-path-particle-dosimetry (MPPD) model. For relevancy real life, model employed measured concentrations toluene-derived fresh aged produced within serially connected smog chamber PAM-OFR (Potential Mass-Oxidation Flow Reactor) under atmospheric environmental conditions (NOx relative humidity). The number chemical composition aerosols chambers were Scanning Mobility Particle Sizer (SMPS) High-Resolution Time-of-Flight Mass Spectrometer (HR-ToF-AMS), while morphology individual was analyzed Electron Microscopy (SEM). concentration SOA-w/s more than double compared that (maximum reached after 10 h) with its size less 100 nm. O:C ratio for 0.96 1.15 depending RH (0.96 at 3% 50% RH), spherical containing water present agglomerates 1 µm. In all inhalable two chambers, 5-22% Head airways, 4-8% tracheobronchial, 8-34% alveolar regions. predominant occurred alveoli (in generation 20th lobe), faction 2-3 times higher children group adults group. presented quantitative exposure assessment generated realistic simulation suggested possibility evaluating long-term health by determining system.

Language: Английский

Insights into the formation of secondary organic aerosols from agricultural residue burning emissions: A review of chamber-based studies

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 952, P. 175932 - 175932

Published: Aug. 31, 2024

Language: Английский