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Record 82 of 3826
Heterogeneous atmospheric reactions - Sulfuric acid aerosols as tropospheric sinks
Author and Affiliation:
Baldwin, A. C.(SRI International Corp., Menlo Park, CA, United States)
Golden, D. M.(SRI International, Menlo Park, Calif., United States)
Abstract: The 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).
Publication Date: Nov 02, 1979
Document ID:
19800026378
(Acquired Nov 30, 1995)
Accession Number: 80A10548
Subject Category: ENVIRONMENT POLLUTION
Document Type: Journal Article
Publication Information: Science; 206; Nov. 2
Publisher Information: United States
Contract/Grant/Task Num: EP-78-C-03-2109; JPL-954815
Financial Sponsor: NASA; United States
Organization Source: SRI International Corp.; Menlo Park, CA, United States
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AEROSOLS; AIR POLLUTION; ATMOSPHERIC CHEMISTRY; REACTION KINETICS; SULFURIC ACID; TROPOSPHERE; ATMOSPHERIC MODELS; PARTICLE COLLISIONS; PROBABILITY THEORY
Imprint And Other Notes: Science, vol. 206, Nov. 2, 1979, p. 562, 563.
Miscellaneous Notes: 1979, p. 562, 563
Availability Source: Other Sources
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