Black carbon and particle lung-deposited surface area in residential wood combustion emissions: Effects of an electrostatic precipitator and photochemical aging

• DOI: 10.1016/j.scitotenv.2024.175840
• Publication Date: 2024-08-28T17:16:27Z
• Authors: A. Mukherjee; A. Hartikainen; J. Joutsensaari; S. Basnet; A. Mesceriakovas; M. Ihalainen; P. Yli-Pirilä; J. Leskinen; M. Somero; J. Louhisalmi; Z. Fang; M. Kalberer; Y. Rudich; J. Tissari; H. Czech; R. Zimmermann; O. Sippula
• Keywords: Electrostatic precipitator; Particle (ecology); Carbon fibers

Residential wood combustion (RWC) remains a significant global source of particulate matter (PM) emissions with adverse impacts on regional air quality, climate, and human health. The lung-deposited surface area (LDSA) equivalent black carbon (eBC) concentrations have emerged as important metrics to assess pollution. In this study we estimated phase-dependent emission factors LDSA for alveolar, tracheobronchial, head-airway regions lungs explored the relationships between eBC in fresh photochemically aged RWC emissions. Photochemical aging was simulated an oxidative flow reactor at OH• exposures 1.4 or 3.4 days atmosphere. Further, efficiency small-scale electrostatic precipitator (ESP) reducing from stove determined. For correlated extremely well LDSA, but correlation decreased after aging. Soot-dominated flaming phase showed highest dependency whereas ignition char burning phases non-BC particles contributed strongly LDSA. Deposition alveolar region around 60 % total lung-deposition. ESP found effective method mitigate mass, stoves, they were reduced average by 72%, 71%, 69%, respectively. reduction efficiencies, however, consistently dropped over span experiment, especially eBC. increase sub-30 nm ultrafine particle number emissions, implications results can be used assessing contribution ambient air.