Volatile organic compound conversion by ozone, hydroxyl radicals, and nitrate radicals in residential indoor air: Magnitudes and impacts of oxidant sources

Details

• Alternative Title:
  Atmos Environ (1994)
• Personal Author:
  Waring, Michael S. ; Wells, J. Raymond
• Description:
  Indoor chemistry may be initiated by reactions of ozone (O|), the hydroxyl radical (OH), or the nitrate radical (NO|) with volatile organic compounds (VOC). The principal indoor source of O| is air exchange, while OH and NO| formation are considered as primarily from O| reactions with alkenes and nitrogen dioxide (NO|), respectively. Herein, we used time-averaged models for residences to predict O|, OH, and NO| concentrations and their impacts on conversion of typical residential VOC profiles, within a Monte Carlo framework that varied inputs probabilistically. We accounted for established oxidant sources, as well as explored the importance of two newly realized indoor sources: (|) the photolysis of nitrous acid (HONO) indoors to generate OH and (|) the reaction of stabilized Criegee intermediates (SCI) with NO| to generate NO|. We found total VOC conversion to be dominated by reactions both with O|, which almost solely reacted with d-limonene, | also with OH, which reacted with d-limonene, other terpenes, alcohols, aldehydes, and aromatics. VOC oxidation rates increased with air exchange, outdoor O|, NO| and d-limonene sources, and indoor photolysis rates; and they decreased with O| deposition and nitric oxide (NO) sources. Photolysis was a strong OH formation mechanism for high NO, NO|, and HONO settings, but SCI/NO| reactions weakly generated NO| except for only a few cases.
• Subjects:
  Article Indoor Chemistry Monte Carlo Modeling Photolysis Terpenes VOC Oxidation
• Source:
  Atmos Environ (1994). 106:382-391
• Pubmed ID:
  26855604
• Pubmed Central ID:
  PMC4741105
• Document Type:
  Journal Article
• Funding:
  CC999999/Intramural CDC HHS/United States
• Volume:
  106
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:c85a6801bf11bc5093b00f654346c72459fd58cb6550efea0d7bef6b42a3f911
• Download URL:
  https://stacks.cdc.gov/view/cdc/37894/cdc_37894_DS1.pdf
• File Type:
  [PDF - 1.33 MB ]