Source Apportionment Of Time And Size Resolved Ambient Particulate Matter
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS(2013)
摘要
Size- and time-resolved particulate matter samples collected using eight-stage Davis Rotating-drum Universal-size-cut Monitoring (DRUM) impactors at the Washington-Dulles International Airport were analyzed for the elemental composition using synchrotron X-ray fluorescence. A physically realistic three-way factor analysis model consisting of the outer products of matrices (profiles) times a vector of mass contributions was applied to these data. The problem was solved using a weighted alternating least squares method. Five major emission sources: soil, road salt, aircraft landings, transported secondary sulfate, and local sulfate/construction were identified. The study shows that time- and size-resolved RDI data can assist in the identification of the airport emission sources and atmospheric processes leading to the observed ambient concentrations. (C) 2013 Elsevier B.V. All rights reserved.
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关键词
Multiway receptor modeling,Size fractionated particles,Rotating drum impactor,SXRF,Airport emission sources
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