1 / 22

Gas

Why is gas/particle partitioning important?. Dispersion of Pollutants Introduced into the Atmosphere as Determined by Residence Times(Husar and Patterson, 1980). Washout by rain:. Washout consists of capture of gas and particle phasesGases equilibrate with rain via Henry's Law (reversible air-water exchange)Particles are irreversibly capturedFor PCBs: Wg ~ 200-400, Wp ~ 104

libitha
Télécharger la présentation

Gas

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Gas/Particle Partitioning

    3. Washout by rain:

    4. Atmospheric reactions

    5. Background of gas/particle distribution

    6. How do we measure G/P partitioning?

    7. Denuder

    8. Impactor

    9. Cyclone

    10. sampling artifacts?

    11. Theory: adsorption vs. absorption

    12. Particle phase concentration dynamics?

    13. If absorption is important, Koa may be a better predictor of Kp

    14. Adsorption

    15. Surface area of particles

    17. Temperature dependence

    18. Adsorption: Pankow 1987

    19. Absorption: Pankow 1994

    20. What is observed in the field?

    21. Mader and Pankow, 2002

    22. difference between PAHs and PCBs in same air mass sampled twice July 22-23, 1994

More Related