Reactive uptake and hydration experiments on amorphous carbon treated with NO2, SO2, O3, HNO3, and H2SO4

The reactivity and hydration properties of amorphous carbon were studied in a low‐pressure Knudsen cell reactor at room temperature (298 K). Reactions of NO2 (γ=0.11±0.04) and HNO3 (γ=0.038±0.008) were observed and may be important for nitrogen partitioning in the atmosphere. Water uptake was measur...

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Bibliographic Details
Published in:Geophysical research letters 1997-02, Vol.24 (4), p.381-384
Main Authors: Rogaski, C. A., Golden, D. M., Williams, L. R.
Format: Article
Language:English
Subjects:
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Particles and aerosols
Online Access:Get full text
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Summary:The reactivity and hydration properties of amorphous carbon were studied in a low‐pressure Knudsen cell reactor at room temperature (298 K). Reactions of NO2 (γ=0.11±0.04) and HNO3 (γ=0.038±0.008) were observed and may be important for nitrogen partitioning in the atmosphere. Water uptake was measured before and after exposure to various gases. Treating the amorphous carbon with NO2 and O3 does not alter the H2O uptake, while treatment with SO2, HNO3, and H2SO4 significantly increases the H2O uptake. The experimental results support current assumptions in jet aircraft plume models that sulfuric acid condensation is involved in the activation of soot particles as condensation nuclei.
ISSN:0094-8276
1944-8007
DOI:10.1029/97GL00093