||Aerosol Generation to Simulate Specific Industrial Fine Particle Effluents.
Carroz, J. W. ;
Odencrantz, F. K. ;
Finnegan, W. G. ;
Drehmel, D. C. ;
||Naval Weapons Center, China Lake, CA.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Air pollution ;
Combustion products ;
Laboratory equipment ;
Sulfur dioxide ;
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The article describes techniques that were developed to generate large quantities of fine particle metal oxide aerosols, by burning flammable solutions containing appropriate soluble compounds (nitrates) of the desired elements. In the flame these compounds generally decomposed to oxides. The generated aerosol flow rates were as a high as 42 cu m/min (1500 cfm); mass concentrations were as high as 16.8 g/cu m at STP. For most aerosols, particle concentrations were of the order of 10 to the 9th power part./cu m. Electron microscopic pictures (SEM and TEM) of precipitated particles show that many of the larger particles (20 micrometers) are hollow and that the smaller particles (0.01 micrometer) are aggregated. Specific aerosols were generated to simulate the fine particle effluents generated by combustion of pulverized coal (electricity generation), electric arc and basic oxygen furnaces (iron and steel production), and zinc smelters. Methods were developed to vary the SO2 concentration and the electrical resistivities of the simulants for coal combustion.