Source-Based Size-Resolved Optical Properties of Carbonaceous Aerosols
- 주제(키워드) aerosol optical properties , carbonaceous aerosol , PMF receptor model , source contribution , polydisperse aerosol
- 주제(기타) Chemistry, Multidisciplinary
- 주제(기타) Engineering, Multidisciplinary
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 설명문(일반) [Jung, Chang Hoon] Kyungin Womens Univ, Dept Hlth Management, 101 Gesan Gil, Incheon 21041, South Korea; [Han, Sang Hee] Univ Florida, Dept Environm Engn Sci, Gainesville, FL 32611 USA; [Lee, Ji Yi] Ewha Womans Univ, Dept Environm Engn & Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Kim, Yong Pyo] Ewha Womans Univ, Dept Chem Engn & Mat Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 MDPI
- 발행년도 2021
- URI http://www.dcollection.net/handler/ewha/000000181398
- 본문언어 영어
- Published As http://dx.doi.org/10.3390/app11041434
초록/요약
In this study, the source-based optical properties of polydisperse carbonaceous aerosols were determined from PM2.5 concentrations measured at a Global Atmospheric Watch station in South Korea. The extinction and absorption coefficients of carbonaceous aerosols were calculated using the Mie theory and assuming a lognormal size distribution. Based on the mass concentration from the EPA's Positive Matrix Factorization (PMF) receptor model, which considers five source identification and apportionment factors (biogenic source, local biomass burning, secondary organic aerosol, transported biomass burning, and mixed sources), the source-based size-resolved mass extinction and absorption efficiencies were estimated for each source using a multilinear regression model. The results show that the source-based optical properties depend on the aerosol size and physicochemical characteristics of the chemical compounds. The long-range transport of biomass burning (LBB) aerosol, which has a mass concentration of 20%, holds a 12.1-23.1% total extinction efficiency-depending on the size and refractive index-in the range of 0.1-0.5 mu m in geometric mean diameter and humic-like substances (HULIS) imaginary refractive index of 0.006-0.3. Biogenic sources of aerosols with small diameters have higher mass absorption efficiencies (MAE) than other sources, depending on the size and refractive index.
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