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AEROSOLS: types SOLID LIQUIID Dust Smoke Fly ash pollen Cloud Mist Fog smog.

Published byJemimah Robertson Modified over 6 years ago

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Presentation on theme: "AEROSOLS: types SOLID LIQUIID Dust Smoke Fly ash pollen Cloud Mist Fog smog."— Presentation transcript:

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9 AEROSOLS: types SOLID LIQUIID Dust Smoke Fly ash pollen Cloud Mist Fog smog

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11 Mount manitoba, June 1991

12 Asian brown cloud over China

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14 AEROSOLS: sources DUST SEA Dust Smoke Fly ash pollen plant fragments cement brake lining tires soil chemical concentration factor (surface effects) CCF = [aerosol]/[sea]

15 AEROSOLS: sizes > 400 nm scatter light < 0.01 micron coagulate > 10 micron settle out Typical size: micron

16 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 light scattering collecting on filters

17 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 Coefficient of Haze Draw 300 meters through a filter measure absorbance x 100 >6 bad for asthma typical samples 5-10 micron

18 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 Total Suspended Particulate Weighing after filtering Units: μg/m3 “normal” ~ 10 μg/m3 sometimes 500 μg/m3 in cities

19 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 Inhalable Particulates Generally IP ~ 0.45 TSP

20 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 Total Dust Fall units: g m-2 month-1 should be < 7 g m-2 month-1 often exceeded in industrial areas

21 AEROSOLS: how to measure them
Alphabet soup: COH TSP IP TDF PM10 Particulate matter < 10 micron PM10 = TSP < 10 μ

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24 Combustion Products. Fly-ash vs. bottom-ash 150 PAHs With 2 – 7 rings

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27 • Nuclei mode • Accumulation mode • Coarse particle mode

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32 Particulate air quality in major world cities
Particulate air quality in major world cities. Values are annual PM10 means. Horizontal line is WHO air quality guideline

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