Mutagenic changes in dilute wood smoke as it ages and reacts with ozone and nitrogen dioxide: an outdoor chamber study
Dilute wood smoke from a residential wood stove was added to two 25-m/sup 3/ outdoor Teflon film chambers. The smoke was permitted to age by itself or react with sub-ppm levels of NO/sub 2/, NO/sub 2/ + O/sub 3/, or O/sub 3/ in the presence and absence of natural sunlight. Most wood smoke particles fell into the 0.07-0.23 ..mu..m size range. The shape of the particle size distributions did not subsequently change during a 4-h reaction period. After reaction with O/sub 3/ + NO/sub 2/, the direct-acting bacterial mutagenicity (TA98-S9) of wood smoke extracts increased 2-10-fold. These changes occurred very rapidly. Increases were also observed when wood smoke was exposed to NO/sub 2/ alone, but these increases were not as great as those resulting from combined effects of O/sub 3/ + NO/sub 2/. Preliminary experiments with wood smoke aged in the dark or in the light in the presence of low levels of NO/sub 2/ and O/sub 3/ (i.e. < 0.06 ppm) did not show increases in bacterial mutagenicity.
- Research Organization:
- Univ. of North Carolina, Chapel Hill
- OSTI ID:
- 6313672
- Journal Information:
- Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 18:7; ISSN ESTHA
- Country of Publication:
- United States
- Language:
- English
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Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
APPLIANCES
ATMOSPHERES
BACTERIA
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
CONTROLLED ATMOSPHERES
DISPERSIONS
ENERGY SOURCES
FUELS
MICROORGANISMS
MUTAGEN SCREENING
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE
PARTICLE SIZE
PHOTOCHEMISTRY
RESIDUES
SALMONELLA
SCREENING
SIZE
SMOKES
SOLS
WOOD BURNING APPLIANCES
WOOD FUELS