Evaluation of composite receptor methods

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:6972273

Dzubay, T G

A composite-receptor model for PM-10 apportionment was evaluated to determine the stability of its solutions and to devise cost-effective measurement strategies. Ambient aerosol samples used in the evaluation were obtained with dichotomous samplers at three sites in the vicinity of Philadelphia, PA and were analyzed by x-ray fluorescence (XRF), instrumental neutron activation (INAA), scanning electron microscopy (SEM), and ion chromatography. The composite receptor model consisted of a wind trajectory method, chemical mass balances (CMB), and multiple linear regression (MLR). In resolving PM-10 into 11 components, SEM was essential for coal-fly ash and botanical matter, XRF was essential for an S-component and vehicle emissions, and INAA was essential for fluidized catalytic crackers at refineries. The remaining components were determined well by either INAA or XRF. Ten to twenty samples were sufficient to determine average source contributions by CMB. Multiple linear regression required 30 or more samples to determine the S-component and at least 50 samples for vehicle emissions.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
• OSTI ID: 6972273
• Report Number(s): PB-88-195193/XAB; EPA-600/D-88/069
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION MONITORING
AIR QUALITY
COLLOIDS
DISPERSIONS
ELECTRON MICROSCOPY
EMISSION
ENVIRONMENTAL QUALITY
EVALUATION
MICROSCOPY
PARTICLE SIZE
PARTICLES
PARTICULATES
SAMPLING
SIZE
SOLS