Diffusion coefficients for ambient nitric and nitrous acids from Denuder experiments in the 1985 nitrogen species methods comparison study

Diffusion coefficients were calculated from nitric acid and nitrous acid deposition patterns in nylon and carbonate diffusion denuders for samples which were generated in the laboratory and for environmental samples. The average nitric acid and nitrous acid diffusion coefficients were calculated to...

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Bibliographic Details
Published in:Atmospheric environment 1988, Vol.22 (8), p.1669-1672
Main Authors: Benner, Cynthia L, Eatough, Norman L, Lewis, Edwin A, Eatough, Delbert J, Huang, Andrew A, Ellis, Elizabeth C
Format: Article
Language:English
Subjects:
Analysis methods
Applied sciences
Atmospheric pollution
diffusion coefficient
Diffusion denuder
Exact sciences and technology
hydration
nitric acid
nitrous acid
Pollution
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Summary:Diffusion coefficients were calculated from nitric acid and nitrous acid deposition patterns in nylon and carbonate diffusion denuders for samples which were generated in the laboratory and for environmental samples. The average nitric acid and nitrous acid diffusion coefficients were calculated to be 0.107 ± 0.016 cm 2 s −1 and 0.102 ± 0.012 cm 2 s −1, respectively, at 25°C and 1 atm. No differences were observed in the diffusion coefficients obtained using the two different denuder systems. The uncertainty in the diffusion coefficient for HNO 3 encompasses the value for the unhydrated species. However, the experimentally obtained value of D 0 for HNO 2 in the presence of water suggests that the molecule is hydrated with an average formula of HNO 2 · (2.1 ± 1.3)H 2O.
ISSN:0004-6981
1352-2310
DOI:10.1016/0004-6981(88)90395-2