Comparative receptor modelling study of TSP, PM2 and PM2-10 in Ho Chi Minh City

被引:110
作者
Hien, PD
Binh, NT
Truong, Y
Ngo, NT
Sieu, LN
机构
[1] Vietnam Atom Energy Agcy, Hanoi, Vietnam
[2] Dalat Nucl Res Inst, Dalat, Lamdong, Vietnam
关键词
INAA; receptor modelling; optimal number of factors; source fingerprints; sources of unmeasured species;
D O I
10.1016/S1352-2310(00)00574-4
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Elemental compositions were measured for TSP (total suspended particulate matter), PM2-10 and PM2 (particulate matter with aerodynamic diameters from 2 to 10 mum and less than 2 mum, respectively) in Ho Chi Minh City. Concentrations of 23 elements and particulate mass (PM) were used for receptor modelling to identify and quantify aerosol sources using principal component Factor analysis (PCFA). A suite of factors containing similar elements with significant factor loadings were revealed among the factor matrices, thus facilitating the identification of common sources for different aerosol types. These sources include vehicular emissions (Br and Zn), coal burning (Se), industrial processes (Ce, Co, Cr, Pb and Sb), road dust (Al, Ti, V), soil dust (Fe and Th) and biomass burning (K). Marine aerosols (Na and Cl) and mineral fly ash (Sc and La) were revealed only in the PM2-10 model. For TSP, the last Four sources are combined in one factor. The last (9th) factor in the PM, model, characterised by a high loading from PM and insignificant loadings From elements, was attributed to secondary sulphates and organics, although these constituents were not measured in the experiments. Such a remarkable source identification capability of the modelling technique highlights the significance of achieving an optimal factor solution as a crucial step in PCFA, that was done by systematically varying the number of factors retained and carefully evaluating each factor matrix for both model fitting performance and physical reasonableness. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2669 / 2678
页数:10
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