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Mukherjee, A.* ; Hartikainen, A.* ; Joutsensaari, J.* ; Basnet, S.* ; Mesceriakovas, A.* ; Ihalainen, M.* ; Yli-Pirilä, P.* ; Leskinen, J.* ; Somero, M.* ; Louhisalmi, J.* ; Fang, Z.* ; Kalberer, M.* ; Rudich, Y.* ; Tissari, J.* ; Czech, H. ; Zimmermann, R. ; Sippula, O.*

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

Sci. Total Environ. 952:175840 (2024)

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

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Air Pollution ; Biomass Burning ; Emission Factors ; Emission Reduction ; Oxidative Flow Reactor ; Particulate Matter; Secondary Organic Aerosol; Outdoor Air-pollution; Effective Density; Fine-particle; Particulate Matter; Airborne Particles; Gaseous Emissions; Mass-spectrometry; Size; Morphology

ISSN (print) / ISBN 0048-9697

e-ISSN 1879-1026

Journal Science of the Total Environment, The

Quellenangaben Volume: 952, Article Number: 175840

Publisher Elsevier

Publishing Place Radarweg 29, 1043 Nx Amsterdam, Netherlands

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Cooperation Group Comprehensive Molecular Analytics (CMA)

Grants Research Council of Finland competitive funding to strengthen university
University of Eastern Finland
Finnish National Agency for Education
Research Council of Finland project BBrCAC