Chemical analysis of size-segregated samples of Denver's ambient particulate

Journal Article · Sun Mar 01 04:00:00 EST 1981 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1981.10465216· OSTI ID:5363697

Countess, R J; Cadle, S H; Groblicki, P J; Wolff, G T

Size-segregated impactor samples of Denver's wintertime airborne particulate were analyzed for the major chemical species. These species are responsible for most of the pollution-related visibility reduction in Denver. Samples were collected three times a day during a 40-day field program in November-December, 1978. Each of the measured chemical species (sulfate, nitrate, ammonium, bromide, organic and elemental carbon) had a log-normally distributed accumulation mode with a mass median aerodynamic diameter near 0.3 ..mu..m. For all species, particle size increased with increasing relative humidity. These results are supported by electrical aerosol analyzer (EAA) measurements. The impactor results for this time period are consistent with a photochemical mechanism for particulate nitrate formation and a heterogeneous mechanism for the formation of sulfate particles. 23 references, 5 figures, 5 tables.

• Research Organization: General Motors Research Labs., Warren, MI
• OSTI ID: 5363697
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 31:3; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
AMMONIUM COMPOUNDS
ATMOSPHERIC CHEMISTRY
BROMIDES
BROMINE COMPOUNDS
CASCADE IMPACTORS
CHEMICAL ANALYSIS
CHEMISTRY
COLLOIDS
COLORADO
DISPERSIONS
FEDERAL REGION VIII
HALIDES
HALOGEN COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
NORTH AMERICA
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PHOTOCHEMISTRY
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SIZE
SOLS
SULFATES
SULFUR COMPOUNDS
USA
VISIBILITY