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| Titel |
Heterogeneous interaction of N2O5 with mineral dust aerosol |
| VerfasserIn |
Mingjin Tang, Jim Thieser, Nicolas Pouvesle, Gerhard Schuster, John Crowley |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250046452
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| Zusammenfassung |
| The heterogeneous reaction of N2O5 with mineral dust aerosols was investigated in an
atmospheric pressure aerosol flow tube. N2O5 was measured by cavity ring-down
spectroscopy, enabling the use of initial N2O5 concentration of less than 10 ppbv. Uptake
coefficients of ~10-2 were found for Saharan dust, independent of relative humidity or
[N2O5]. The presence of O3 (1-10 ppmv) was found to enhance the uptake of N2O5
significantly, indicating a surface-catalyzed decomposition mechanism rather than
heterogeneous hydrolysis. Results from the heterogeneous reaction of mineral dust aerosol
with HNO3 (measured by chemical ionization mass spectroscopy) will also be presented and
compared. |
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