Abstract
The chemical and physical processes that govern the distribution of ammonium salt condensate over a size- and composition-dispersed aerosol particle population are considered. From an analysis of the concentration profiles of ammonia, nitric acid, and hydrochloric acid vapors surrounding an aerosol particle, the single particle fluxes of these species are derived. By evaluating the time scales for equilibration of the vapor-phase species with a population of aerosol particles, it is found that ammonium salts in the gas and aerosol phases are not always in equilibrium, especially under less polluted and cooler conditions. The principles that govern the distribution of ammonium salts on aerosol particles of different size and composition are identified, and it is found that thermodynamic equilibrium often does not uniquely determine the distribution of ammonium salt condensate. Thus it is concluded that both transport and thermodynamic properties of the aerosol population govern the distribution of ammonium salt condensate.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1231-1246 |
| Number of pages | 16 |
| Journal | Atmospheric Environment Part A, General Topics |
| Volume | 24 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1990 |
| Externally published | Yes |
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Keywords
- aerosol size distribution
- ammonium chloride
- Ammonium nitrate
- atmospheric aerosol
- thermodynamic equilibrium
- time constants
ASJC Scopus subject areas
- Pollution
Cite this
The distribution of ammonium salts among a size and composition dispersed aerosol. / Wexler, Anthony S.; Seinfeld, John H.
In: Atmospheric Environment Part A, General Topics, Vol. 24, No. 5, 1990, p. 1231-1246.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The distribution of ammonium salts among a size and composition dispersed aerosol
AU - Wexler, Anthony S.
AU - Seinfeld, John H.
PY - 1990
Y1 - 1990
N2 - The chemical and physical processes that govern the distribution of ammonium salt condensate over a size- and composition-dispersed aerosol particle population are considered. From an analysis of the concentration profiles of ammonia, nitric acid, and hydrochloric acid vapors surrounding an aerosol particle, the single particle fluxes of these species are derived. By evaluating the time scales for equilibration of the vapor-phase species with a population of aerosol particles, it is found that ammonium salts in the gas and aerosol phases are not always in equilibrium, especially under less polluted and cooler conditions. The principles that govern the distribution of ammonium salts on aerosol particles of different size and composition are identified, and it is found that thermodynamic equilibrium often does not uniquely determine the distribution of ammonium salt condensate. Thus it is concluded that both transport and thermodynamic properties of the aerosol population govern the distribution of ammonium salt condensate.
AB - The chemical and physical processes that govern the distribution of ammonium salt condensate over a size- and composition-dispersed aerosol particle population are considered. From an analysis of the concentration profiles of ammonia, nitric acid, and hydrochloric acid vapors surrounding an aerosol particle, the single particle fluxes of these species are derived. By evaluating the time scales for equilibration of the vapor-phase species with a population of aerosol particles, it is found that ammonium salts in the gas and aerosol phases are not always in equilibrium, especially under less polluted and cooler conditions. The principles that govern the distribution of ammonium salts on aerosol particles of different size and composition are identified, and it is found that thermodynamic equilibrium often does not uniquely determine the distribution of ammonium salt condensate. Thus it is concluded that both transport and thermodynamic properties of the aerosol population govern the distribution of ammonium salt condensate.
KW - aerosol size distribution
KW - ammonium chloride
KW - Ammonium nitrate
KW - atmospheric aerosol
KW - thermodynamic equilibrium
KW - time constants
UR - http://www.scopus.com/inward/record.url?scp=0025276730&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025276730&partnerID=8YFLogxK
U2 - 10.1016/0960-1686(90)90088-5
DO - 10.1016/0960-1686(90)90088-5
M3 - Article
AN - SCOPUS:0025276730
VL - 24
SP - 1231
EP - 1246
JO - Atmospheric Environment
JF - Atmospheric Environment
SN - 1352-2310
IS - 5
ER -