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Heterogeneous atmospheric reactions - Sulfuric acid aerosols as tropospheric sinksThe reaction probabilities of various atmospheric species incident on a bulk sulfuric acid surface are measured in order to determine the role of sulfuric acid aerosols as pollutant sinks. Reaction products and unreacted starting materials leaving a Knudsen cell flow reactor after collision at 300 K with a H2SO4 surface or a soot surface were detected by mass spectrometry. Significant collision reaction probabilities are observed on a H2SO4 surface for H2O2, HNO3, HO2NO2, ClONO2, N2O5, H2O and NH3, and on soot for NH3. Estimates of the contribution of heterogeneous reactions to pollutant removal under atmospheric conditions indicate that while aerosol removal in the stratosphere is insignificant (loss rate constants approximately 10 to the -10th/sec), heterogeneous reactions may be the dominant loss process for several tropospheric species (loss rate constant approximately 10 to the -5th/sec, comparable to photolysis rate constants).
Document ID
19800026378
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Baldwin, A. C.
(SRI International Corp. Menlo Park, CA, United States)
Golden, D. M.
(SRI International Menlo Park, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
November 2, 1979
Publication Information
Publication: Science
Volume: 206
Subject Category
Environment Pollution
Accession Number
80A10548
Funding Number(s)
CONTRACT_GRANT: EP-78-C-03-2109
CONTRACT_GRANT: JPL-954815
Distribution Limits
Public
Copyright
Other

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