Indoor air chemistry: Formation of organic acids and aldehydes

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:197464

Zhang, J; Lioy, P J ^[1]; Wilson, W E ^[2]

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1. Environmental and Occupational Health Sciences Inst., Piscataway, NJ (United States)
2. Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.

Laying emphasis on the formation of aldehydes and organic acids, the study has examined the gas-phase reactions of ozone with unsaturated VOCs. The formation of formaldehyde and formic acid was observed for all the three selected unsaturated VOCs: styrene, limonene, and 4-vinylcyclohexene. In addition, benzaldehyde was detected in the styrene-ozone-air reaction system, and acetic acid was also found in limonene-ozone-air system. The study has also examined the gas-phase reactions among formaldehyde, ozone, and nitrogen dioxide and found the formation of formic acid. The nitrate radical was suggested to play an important role in converting formaldehyde into formic acid. Experiments for all the reactions were conducted by using a 4.3 m{sup 3} Teflon chamber. Since the conditions for the reactions were similar to those for indoor environments, the results from the study can be implicated to real indoor situations and can be employed to support the findings and suggestions from the previous studies: certain aldehydes and organic acids could be generated by indoor chemistry.

• OSTI ID: 197464
• Report Number(s): CONF-9405167--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
FORMALDEHYDE
FORMIC ACID
INDOOR AIR POLLUTION
NITROGEN DIOXIDE
ORGANIC COMPOUNDS
OZONE
PHASE STUDIES
PHOTOCHEMICAL REACTIONS
STYRENE