A graphical method for apportioning two PM10 emission sources
- Desert Research Inst., Reno, NV (United States)
- Univ. of Southern California, Los Angeles, CA (United States). Dept. of Civil Engineering
A graphical approach is introduced to estimate the two primary quantities for roadway and soil-dust emissions: (1) their individual source compositions; and (2) their individual mass contributions to the ambient PM10. These quantities are not directly measurable in the ambient because the emission areas are always merged together in the Anaheim or Long Beach area, California. This is an original source apportionment problem, and the solution may be approached by receptor modeling. Among the chemical and multivariate receptor models, the theory of SAFER (Source Apportionment by Factors with Explicit Restrictions) modeling process, which has been developed by Henry (1991) utilizing the self-modeling curve resolution technique, was designed to analytically and explicitly approach a source apportionment, and to provide some boundary limited, non-negative, and physically meaningful solution regions. The graphical model in this paper is a two-dimensional SAFER, and demonstrates the comprehensive principles of the SAFER by a two-source apportionment. The apportioning process will solve a set of mass-balance relations between ambient PM10 concentrations and roadway/soil-dust emissions, with the constraints for non-negative estimations, on the basis of ambient PM10 concentration data. This study used the ambient data collected during the 1987 Southern California Air Quality Study. The result indicates that the average apportionment allocates 24% of the total PM10 to roadway, 18% to soil, 35% to inorganic secondary species, and the remaining 23% is an upper limit on the amount of secondary organic PM10.
- OSTI ID:
- 351145
- Report Number(s):
- CONF-970677-; TRN: IM9925%%307
- Resource Relation:
- Conference: 90. annual meeting and exhibition of the Air and Waste Management Association, Toronto (Canada), 8-13 Jun 1997; Other Information: PBD: 1997; Related Information: Is Part Of 1997 proceedings of the Air and Waste Management Association`s 90. annual meeting and exhibition; PB: [7000] p.
- Country of Publication:
- United States
- Language:
- English
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