Main Title |
Mass and Composition of an Urban Aerosol as a Function of Particle Size for Several Visibility Levels. |
Author |
Patterson, Ronald K. ;
Wagman., Jack ;
|
CORP Author |
Environmental Sciences Research Lab., Research Triangle Park, N.C. |
Year Published |
1977 |
Report Number |
EPA/600/J-77/081; |
Stock Number |
PB-278 342 |
Additional Subjects |
Aerosols ;
Visibility ;
Air pollution ;
Sampling ;
Metropolitan areas ;
New York ;
Particle size distribution ;
Ions ;
Zinc ;
Magnesium ;
Iron ;
Lead(Metal) ;
Chlorides ;
Chemical analysis ;
Fines ;
Concentration(Composition) ;
Sulfates ;
Inorganic nitrates ;
Mass ;
Ammonium compounds ;
Reprints ;
Air pollution detection ;
New York City(New York) ;
Atmospheric transmissivity
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-278 342 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
13p |
Abstract |
An atmospheric aerosol sampling analysis experiment at a site near the center of the New York metropolitan area was carried out to delineate relationships existing between degree of visibility and various aerosol characteristics in a polluted atmosphere. Size-fractionated and unfractionated particulate samples were collected at four discrete levels of visibility and analyzed for SO4(-2), NO3(-1), Cl(-1), NH4(+1), Pb, Fe, Mg, Zn and total mass. At all levels of visibility, bimodal or multimodal particle size distributions were observed for total mass and, in some cases, for individual components. Decreased visibility corresponded to increased particle mass concentration especially in the fine particle fraction (ranging in size from about 0.1 to 1.0 micrometer dia.). Increases in the proportion of particulate sulfate and, to a lesser extent, of nitrate, chloride, ammonium, and carbon were also associated with decreased visibility. |
Supplementary Notes |
Revision of report dated 27 Jul 76. Pub. in Jnl. of Aerosol Science, v8 p269-279 1977. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Mass and Composition of an Urban Aerosol as a Function of Particle Size for Several Visibility Levels. |
PUB Date Free Form |
10 Jan 77 |
Category Codes |
7D; 68A; 99A |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/09 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
323736436 |
Origin |
NTIS |
Type |
CAT |