Microscopical analysis of aerosols transported from St. Louis

Conference · Thu Jan 01 04:00:00 EST 1976 · Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States)

OSTI ID:7223116

Draftz, R G; Graf, J; Yamate, G

The study, sponsored by the Environmental Protection Agency, was to measure the transport and fate of sulfur dioxide from St. Louis' urban and powerplant plumes. These plumes were traced and sampled by instrumented aircraft at distances up to 300 miles from St. Louis. In addition to sampling SO/sub 2/, a special 4 stage impactor was constructed for sampling aerosols for microscopical analysis. Samples were returned to St. Louis within 2-4h after collecting and identified or classified by morphological properties. The major components were sulfuric acid or ammonium sulfate, usually found on the third stage (0.5 ..mu..m) and often 5 ..mu..m in length, indicating crystallization. Fly ash and mineral particles, some unusually carbonaceous deposits, and submicrometer sized clays and other minerals were also found. This study provided the first direct verification of sulfuric acid in urban atmosphere and also proof of the long range transport.

• Research Organization: IIT Research Inst., Chicago
• OSTI ID: 7223116
• Conference Information: Journal Name: Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States) Journal Volume: 16:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AERIAL MONITORING
AEROSOL MONITORING
AEROSOL WASTES
AEROSOLS
AIR POLLUTION
CHALCOGENIDES
COLLOIDS
DISPERSIONS
FLY ASH
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MICROSCOPES
MICROSCOPY
MONITORING
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PLUMES
POLLUTION
POWER PLANTS
RESIDUES
SMOKES
SOLS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
WASTES