Abstract
The basic aerosol phenomena, condensation, coagulation, nucleation and gravitational settling, were studied in plumes generated by industrial point sources. The investigation was concentrated on regions near the source, where the plume is still clearly distinguishable from the background and not vertically mixed. Initially vapors are depleted from the plume more by condensation than by mixing, while later these two processes are often comparable in magnitude. Explicit treatment of condensation is required during most stages of the plume development. Coagulation is normally suppressed by the more rapid dilution, and is probably significant only for nanometer sized nuclei. Gravitational settling depletes largest particles from the plume, but has no effect on other aerosol processes. Binary homogeneous nucleation of sulfuric acid and water is probably a commonplace phenomenon in power plant plumes, can take place only after the plume becomes rather diluted, and is favored by high SO2(g) to fine particulate mass ratio in the emissions, cool and humid ambient conditions, and strong solar radiation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 361-375 |
| Number of pages | 15 |
| Journal | Atmospheric Environment |
| Volume | 29 |
| Issue number | 3 |
| State | Published - Feb 1995 |
| Externally published | Yes |
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Keywords
- coagulation
- condensation
- Gaussian plume
- gravitational settling
- mixing rate
- nucleation
- Point source
ASJC Scopus subject areas
- Environmental Science(all)
- Atmospheric Science
- Pollution
- Earth and Planetary Sciences(all)
Cite this
The interdependence of aerosol processes and mixing in point source plumes. / Kerminen, Veli Matti; Wexler, Anthony S.
In: Atmospheric Environment, Vol. 29, No. 3, 02.1995, p. 361-375.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The interdependence of aerosol processes and mixing in point source plumes
AU - Kerminen, Veli Matti
AU - Wexler, Anthony S.
PY - 1995/2
Y1 - 1995/2
N2 - The basic aerosol phenomena, condensation, coagulation, nucleation and gravitational settling, were studied in plumes generated by industrial point sources. The investigation was concentrated on regions near the source, where the plume is still clearly distinguishable from the background and not vertically mixed. Initially vapors are depleted from the plume more by condensation than by mixing, while later these two processes are often comparable in magnitude. Explicit treatment of condensation is required during most stages of the plume development. Coagulation is normally suppressed by the more rapid dilution, and is probably significant only for nanometer sized nuclei. Gravitational settling depletes largest particles from the plume, but has no effect on other aerosol processes. Binary homogeneous nucleation of sulfuric acid and water is probably a commonplace phenomenon in power plant plumes, can take place only after the plume becomes rather diluted, and is favored by high SO2(g) to fine particulate mass ratio in the emissions, cool and humid ambient conditions, and strong solar radiation.
AB - The basic aerosol phenomena, condensation, coagulation, nucleation and gravitational settling, were studied in plumes generated by industrial point sources. The investigation was concentrated on regions near the source, where the plume is still clearly distinguishable from the background and not vertically mixed. Initially vapors are depleted from the plume more by condensation than by mixing, while later these two processes are often comparable in magnitude. Explicit treatment of condensation is required during most stages of the plume development. Coagulation is normally suppressed by the more rapid dilution, and is probably significant only for nanometer sized nuclei. Gravitational settling depletes largest particles from the plume, but has no effect on other aerosol processes. Binary homogeneous nucleation of sulfuric acid and water is probably a commonplace phenomenon in power plant plumes, can take place only after the plume becomes rather diluted, and is favored by high SO2(g) to fine particulate mass ratio in the emissions, cool and humid ambient conditions, and strong solar radiation.
KW - coagulation
KW - condensation
KW - Gaussian plume
KW - gravitational settling
KW - mixing rate
KW - nucleation
KW - Point source
UR - http://www.scopus.com/inward/record.url?scp=0028977744&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028977744&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0028977744
VL - 29
SP - 361
EP - 375
JO - Atmospheric Environment
JF - Atmospheric Environment
SN - 1352-2310
IS - 3
ER -