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DOI	10.1016/j.atmosres.2020.105029
	Intensive optical parameters of pollution sources identified by the positive matrix factorization technique
	Romano S.; Vecchi R.; Perrone M.R.
发表日期	2020
ISSN	0169-8095
卷号	244
英文摘要	A new methodology based on optical parameters from integrating nephelometer measurements and chemically speciated PM10 mass concentrations, to associate intensive optical parameters with pollution sources identified by the Positive Matrix Factorization (PMF) technique, is presented. PM10 samplings and integrating nephelometer measurements at 450, 525, and 635 nm, co-located in space and time, were performed from November 2011 to November 2012. The PM10 samples were chemically characterized for 16 species, including ions (Na+, NH4 +, K+, Mg2+, Ca2+, Cl−, NO3 −, and SO4 2−), metals (Al, Cd, Cu, Fe, Mn, and Ti), OC, and EC. The scattering σs and backscattering βs coefficients at 450, 525, and 635 nm, and the PM10 chemically speciated data were used as input of the PMF model. Traffic (TRA, 28.3%), Biomass Burning and Nitrates (BBN, 27.4%), Soil Dust (SDU, 14.7%), ammonium Sulphate (SUL, 17.0%), and Aged Sea-salt (ASS, 12.6%) were the identified pollution sources, according to the PM10 mass apportionment, which did not show any significant difference in terms of source assignment and contribution, with respect to the solution without optical variables. The possibility of retrieving intensive optical parameters associated with the pollution sources from the related spectrally resolved σs and βs values is the main feature of the proposed approach. The mass scattering efficiency (ΣPM10), the scattering Ångstrom exponent (Å), the spectral curvature of the scattering Ångstrom exponent (ΔÅ), and the asymmetry parameter (g) were the main intensive parameters calculated at different wavelengths or wavelength pairs to characterize the identified pollution sources. ΣPM10 and g at 450 nm, Å(450, 635 nm) and ΔÅ were equal to 3.4 m2 g−1, 0.57, 0.96, and 0.54 for the TRA-source, to 5.0 m2 g−1, 0.58, 1.57, and − 0.06 for the BBN-source, to 5.0 m2 g−1, 0.67, 1.54, and 0.24 for the SUL-source, and to 0.6 m2 g−1, 0.33, −0.65, and 0.12 for the ASS-source, respectively. The analysis of monitoring days with a prevailing pollution source and the comparison of the paper's results with literature values have demonstrated the reliability of the used methodology. © 2020 Elsevier B.V.
英文关键词	Intensive optical parameters; Nephelometer measurements; PM10 chemical composition; Positive matrix factorization; Source apportionment
语种	英语
scopus关键词	Bayesian networks; Factorization; Matrix algebra; Nephelometers; Optical variables control; Pollution; Reliability analysis; Sulfur compounds; Ammonium sulphate; Asymmetry parameter; Intensive parameters; Mass scattering efficiency; Optical parameter; Pm10 mass concentrations; Pollution sources; Positive Matrix Factorization; Parameter estimation; air quality; atmospheric pollution; backscatter; concentration (composition); factor analysis; matrix; numerical model; particulate matter; pollutant source; pollution monitoring; source identification
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141867
作者单位	Dipartimento di Matematica e Fisica, Università del Salento, Lecce, 73100, Italy; Dipartimento di Fisica, Università di Milano, Milan, 20133, Italy
推荐引用方式 GB/T 7714	Romano S.,Vecchi R.,Perrone M.R.. Intensive optical parameters of pollution sources identified by the positive matrix factorization technique[J],2020,244.
APA	Romano S.,Vecchi R.,&Perrone M.R..(2020).Intensive optical parameters of pollution sources identified by the positive matrix factorization technique.Atmospheric Research,244.
MLA	Romano S.,et al."Intensive optical parameters of pollution sources identified by the positive matrix factorization technique".Atmospheric Research 244(2020).