Physics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29n..10m&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 14, pp. 10-1, CiteID 1665, DOI 10.1029/2002GL014896
Physics
5
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions
Scientific paper
The uptake of ozone on various mineral powders has been studied using a Knudsen cell apparatus at T = 296 K. Samples included α-Al2O3, α-Fe2O3, SiO2, China loess and Saharan sand. Reactive uptake coefficients, γBET, were measured for the various particles and found to be 8 +/- 5 × 10-5 for α-Al2O3, 1.8 +/- 0.7 × 10-4 for α-Fe2O3 and 5 +/- 3 × 10-5 for SiO2. The authentic dust samples were found to have γBET values of 2.7 +/- 0.9 × 10-5 for China loess and 6 +/- 3 × 10-5 for Saharan sand. Variations in the reactivity of the Saharan sand were observed as a function of sample treatment. Under the conditions of this study, heterogeneous uptake of ozone is catalytic and results in the destruction of ozone.
Grassian Vicki H.
Michel A. E.
Usher C. R.
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