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Boundary layer measurements of the OH radical in the vicinity of an isolated power plant plume - SO2 and NO2 chemical conversion timesDirect measurements of the OH radical in the vicinity of an isolated power plant plume are reported. These measurements were used to estimate the conversion time of SO2 to H2SO4-sulfate aerosol via the initiating step OH + SO2 + M yields HSO3. Using the near-high-noon measured value of OH (9.5 million per cu cm), resulted in a 1/e conversion time of 1.4 days. The latter lifetime would correspond to a conversion rate of about 2%/hr. When the lifetime calculation was modified to take into consideration the OH diurnal cycle, the 1/e conversion time for SO2 was found to be 4.4 days, giving an apparent overall rate of conversion of about 0.7%/hr. Similar calculations carried out for the conversion of NO2 to NHO3 resulted in 1/e lifetimes for NO2 of 2-3 h for midday time periods.
Document ID
19790063851
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Davis, D. D.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Philen, D.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Mcgee, T.
(Georgia Institute of Technology Atlanta, Ga., United States)
Heaps, W.
(NASA Goddard Space Flight Center Greenbelt, Md.; Georgia Institute of Technology, Atlanta, Ga., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Publication Information
Publication: Atmospheric Environment
Volume: 13
Issue: 8, 19
Subject Category
Environment Pollution
Accession Number
79A47864
Distribution Limits
Public
Copyright
Other

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