Size-Resolved Identification, Characterization, and Quantification of Primary Biological Organic Aerosol at a European Rural Site

Environmental Science & Technology
Carlo BozzettiAndre S H Prevot

Abstract

Primary biological organic aerosols (PBOA) represent a major component of the coarse organic matter (OMCOARSE, aerodynamic diameter > 2.5 μm). Although this fraction affects human health and the climate, its quantification and chemical characterization currently remain elusive. We present the first quantification of the entire PBOACOARSE mass and its main sources by analyzing size-segregated filter samples collected during the summer and winter at the rural site of Payerne (Switzerland), representing a continental Europe background environment. The size-segregated water-soluble OM was analyzed by a newly developed offline aerosol mass spectrometric technique (AMS). Collected spectra were analyzed by three-dimensional positive matrix factorization (3D-PMF), showing that PBOA represented the main OMCOARSE source during summer and its contribution to PM10 was comparable to that of secondary organic aerosol. We found substantial cellulose contributions to OMCOARSE, which in combination with gas chromatography mass spectrometry molecular markers quantification, underlined the predominance of plant debris. Quantitative polymerase chain reaction (qPCR) analysis instead revealed that the sum of bacterial and fungal spores mass represen...Continue Reading

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Citations

Feb 2, 2021·Frontiers in Microbiology·Abdoulaye SamakéJean-Luc Jaffrezo
Nov 20, 2020·Nature·Kaspar R DaellenbachAndré S H Prévôt
Nov 5, 2020·The Science of the Total Environment·D SrivastavaA Albinet
Mar 26, 2021·Science Advances·Houssni LamkaddamUrs Baltensperger
Aug 6, 2021·Environmental Science and Pollution Research International·Jialin DengLin Xiao

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