Molecular marker characterization and source appointment of particulate matter and its organic aerosols
- 주제(키워드) Molecular marker (MM) , PM<inf>2.5</inf> , Positive matrix factorization (PMF) , Secondary organic aerosol (SOA) , TSP
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier Ltd
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000117766
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.chemosphere.2015.04.093
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
This study was carried out to identify possible sources and to estimate their contribution to total suspended particle (TSP) organic aerosol (OA) contents. A total of 120 TSP and PM<inf>2.5</inf> samples were collected simultaneously every third day over a one-year period in urban area of Incheon, Korea. High concentration in particulate matters (PM) and its components (NO<inf>3</inf>-, water soluble organic compounds (WSOCs), and n-alkanoic acids) were observed during the winter season. Among the organics, n-alkanes, n-alkanoic acids, levoglucosan, and phthalates were major components. Positive matrix factorization (PMF) analysis identified seven sources of organic aerosols including combustion 1 (low molecular weight (LMW)-polycyclic aromatic hydrocarbons (PAHs)), combustion 2 (high molecular weight (HMW)-PAHs), biomass burning, vegetative detritus (n-alkane), secondary organic aerosol 1 (SOA1), secondary organic aerosol 2 (SOA2), and motor vehicles. Vegetative detritus increased during the summer season through an increase in biogenic/photochemical activity, while most of the organic sources were prominent in the winter season due to the increases in air pollutant emissions and atmospheric stability. The correlation factors were high among the main components of the organic carbon (OC) in the TSP and PM<inf>2.5</inf>. The results showed that TSP OAs had very similar characteristics to the PM<inf>2.5</inf> OAs. SOA, combustion (PAHs), and motor vehicle were found to be important sources of carbonaceous PM in this region. Our results imply that molecular markers (MMs)-PMF model can provide useful information on the source and characteristics of PM. © 2015 Elsevier Ltd.
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