Removal of atmospheric oxidants with annular denuders

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00076a002· OSTI ID:5397043

Williams, II, E L; Grosjean, D ^[1]

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1. DGA, Inc., Ventura, CA (USA)

Annular denuders have been tested for their ability to remove atmospheric photochemical oxidants including ozone (150-170 ppb), nitrogen dioxide (40-200 ppb), nitric acid (35 ppb), and peroxyacetyl nitrate (PAN, 6-25 ppb). Formaldehyde (80-140 ppb) was also tested as a copollutant. Tests were carried out at low rates of 1,2, and 20 L/min, with oxidants tested singly or as part of photochemical mixtures in purified air. Efficient collection was obtained with annular denuders coated with potassium iodide (O{sub 3}), phenoxamine (O{sub 3}), sodium carbonate (HNO{sub 3}), potassium hydroxide (PAN), and 2,4-dinitrophenylhydrazine (HCHO).

• OSTI ID: 5397043
• Journal Information: Environmental Science and Technology; (United States), Vol. 24:6; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
PHOTOCHEMICAL OXIDANTS
REMOVAL
AIR POLLUTION
FORMALDEHYDE
MEASURING INSTRUMENTS
NITRIC ACID
NITROGEN DIOXIDE
OZONE
PEROXYACETYL NITRATE
ALDEHYDES
CHALCOGENIDES
ESTERS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects