 |
| Titel |
The interaction of N2O5 with mineral dust: aerosol flow tube and Knudsen reactor studies |
| VerfasserIn |
C. Wagner, F. Hanisch, N. Holmes, H. Coninck, G. Schuster, J. N. Crowley |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 1 ; Nr. 8, no. 1 (2008-01-14), S.91-109 |
| Datensatznummer |
250005338
|
| Publikation (Nr.) |
 copernicus.org/acp-8-91-2008.pdf |
|
|
|
|
|
| Zusammenfassung |
| The interaction of mineral dust with N2O5 was investigated using
both airborne mineral aerosol (using an aerosol flow reactor with variable
relative humidity) and bulk samples (using a Knudsen reactor at zero
humidity). Both authentic (Saharan, SDCV) and synthetic dust samples
(Arizona test dust, ATD and calcite, CaCO3) were used to derive
reactive uptake coefficients (γ). The aerosol experiments (Saharan
dust only) indicated efficient uptake, with e.g. a value of
γ(SDCV)=(1.3±0.2)×10−2 obtained at zero relative humidity.
The values of γ obtained for bulk substrates in the Knudsen reactor
studies are upper limits due to assumptions of available surface area, but
were in reasonable agreement with the AFT measurements, with:
γ(SDCV)=(3.7±1.2)×10−2, γ(ATD)=(2.2±0.8)×10−2
and γ(CaCO3=(5±2)×10−2. The errors quoted are statistical only. The results are
compared to literature values and assessed in terms of their impact on
atmospheric N2O5. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|