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  • Salvador, Christian Mark,1989Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology (author)

Indoor ozone/human chemistry and ventilation strategies

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019-09-15
  • Hindawi Limited,2019
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:badc303f-4304-4fec-bfb9-7bfcd12eab20
  • https://research.chalmers.se/publication/512859URI
  • https://doi.org/10.1111/ina.12594DOI
  • https://gup.ub.gu.se/publication/283889URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ivl:diva-3351URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • A-rapport, A2442
  • This study aimed to better understand and quantify the influence of ventilation strategies on occupant-related indoor air chemistry. The oxidation of human skin oil constituents was studied in a continuously ventilated climate chamber at two air exchange rates (1 h-1 and 3 h-1 ) and two initial ozone mixing ratios (30 and 60 ppb). Additional measurements were performed to investigate the effect of intermittent ventilation ("off" followed by "on"). Soiled t-shirts were used to simulate the presence of occupants. A time-of-flight-chemical ionization mass spectrometer (ToF-CIMS) in positive mode using protonated water clusters was used to measure the oxygenated reaction products geranyl acetone, 6-methyl-5-hepten-2-one (6-MHO) and 4-oxopentanal (4-OPA). The measurement data were used in a series of mass balance models accounting for formation and removal processes. Reactions of ozone with squalene occurring on the surface of the t-shirts are mass transport limited; ventilation rate has only a small effect on this surface chemistry. Ozone-squalene reactions on the t-shirts produced gas-phase geranyl acetone, which was subsequently removed almost equally by ventilation and further reaction with ozone. About 70% of gas-phase 6-MHO was produced in surface reactions on the t-shirts, the remainder in secondary gas-phase reactions of ozone with geranyl acetone. 6-MHO was primarily removed by ventilation, while further reaction with ozone was responsible for about a third of its removal. 4-OPA was formed primarily on the surfaces of the shirts (~60%); gas-phase reactions of ozone with geranyl acetone and 6-MHO accounted for ~30% and ~10%, respectively. 4-OPA was removed entirely by ventilation. The results from the intermittent ventilation scenarios showed delayed formation of the reaction products and lower product concentrations compared to continuous ventilation.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Beko, G.Danmarks Tekniske Universitet,Technical University of Denmark (author)
  • Weschler, Charles J.Rutgers University,Danmarks Tekniske Universitet,Technical University of Denmark (author)
  • Morrison, GlennThe University of North Carolina,The University of North Carolina System (author)
  • Le Breton, Michael,1986Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology(Swepub:gu)xlebrm (author)
  • Hallquist, Mattias,1969Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology(Swepub:gu)xhamat (author)
  • Ekberg, Lars,1962Chalmers tekniska högskola,Chalmers University of Technology,CIT Energy management AB(Swepub:cth)le (author)
  • Langer, Sarka,1960IVL Svenska Miljöinstitutet(Swepub:ivl)P010239 (author)
  • Göteborgs universitetInstitutionen för kemi och molekylärbiologi (creator_code:org_t)

Related titles

  • In:Indoor Air: Hindawi Limited29:6, s. 913-9251600-06680905-6947

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  • Indoor Air (Search for host publication in LIBRIS)

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