Impact of human presence on secondary organic aerosols derived from ozone-initiated chemistry in a simulated office environment

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DOIResolve DOI: http://doi.org/10.1021/es3050828
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TypeArticle
Journal titleEnvironmental Science and Technology
ISSN0013-936X
Volume47
Issue8
Pages39333941; # of pages: 9
SubjectAir handling systems; Fast mobility particle sizers; Identical conditions; Indoor pollutants; Mass concentration; Office environments; Ozone concentration; Secondary organic aerosols; Aerosols; Experiments; Monoterpenes; Ozone; limonene; ozone; terpene; aerosol; atmospheric pollution; concentration (composition); estimation method; experimental study; human activity; indoor air; ozone; simulation; ultraviolet radiation; adult; air pollution; article; chemical reaction; concentration (parameters); controlled study; environmental exposure; human; microclimate; photometry; pollutant; secondary organic aerosol; work environment
AbstractSeveral studies have documented reductions in indoor ozone levels that occur as a consequence of its reactions with the exposed skin, hair and clothing of human occupants. One would anticipate that consumption of ozone via such reactions would impact co-occurring products derived from ozone's reactions with various indoor pollutants. The present study examines this possibility for secondary organic aerosols (SOA) derived from ozone-initiated chemistry with limonene, a commonly occurring indoor terpene. The experiments were conducted at realistic ozone and limonene concentrations in a 240 m3 chamber configured to simulate a typical open office environment. During an experiment the chamber was either unoccupied or occupied with 18-20 workers. Ozone and particle levels were continuously monitored using a UV photometric ozone analyzer and a fast mobility particle sizer (FMPS), respectively. Under otherwise identical conditions, when workers were present in the simulated office the ozone concentrations were approximately two-thirds and the SOA mass concentrations were approximately one-half of those measured when the office was unoccupied. This was observed whether new or used filters were present in the air handling system. These results illustrate the importance of accounting for occupancy when estimating human exposure to pollutants in various indoor settings. © 2013 American Chemical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Construction (CONST-CONST)
Peer reviewedYes
NPARC number21269833
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Record identifier5848f3a5-9481-4510-b71a-3a42b616aabe
Record created2013-12-13
Record modified2016-05-09
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