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Chemical speciation of sulfate emissions from catalyst-equipped automobiles under ambient conditions

Author
Tanner, R. L.
Published
United States : [publisher not identified], 1976.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1976.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Newman, L.

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Summary
Airborne particles samples were obtained on treated quartz filters during five days of the GM Sulfate Dispersion Experiment and analyzed for total acidity, sulfuric acid, ammonium, soluble sulfate (two methods), total sulfur and nitrate. From the resultant data the roadside impact from sulfate emissions by the observed fleet of catalyst-equipped autos is calculated to be in the range 3-6 ..mu..g/m/sup 3/, probably all in the form of sulfuric acid. This particulate sulfuric acid emission is apparently neutralized by ambient ammonia with a half-life of tens of seconds with the rate dependent on the ambient ammonia concentration. Experimental examples of sulfuric acid impact; ammonia-neutralized sulfate impact; and partially neutralized sulfate impact at 30 meters or 100 meters downwind from the roadway are cited.
Report Numbers
BNL-21040(Rev.)
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: EY-76-C-02-0016
OSTI Identifier 7260058
Research organization: Brookhaven National Lab., Upton, NY (USA).
View MARC record | catkey: 42281457