Impacts of a clay plaster on indoor air quality assessed using chemical and sensory measurements

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Passive removal materials (PRMs) are building materials or furnishings that effectively control indoor pollution without substantial formation of chemical byproducts and without an energy penalty. Recent studies have suggested that clay might be an effective PRM for ozone. To assess clay wall plaster as a PRM for improving air quality by controlling ozone, perceived air quality (PAQ) was determined in the presence of eight combinations of an emitting and reactive pollutant source (new carpet), clay plaster applied to gypsum wallboard, and chamber air with and without ozone. A panel of 24 human subjects assessed air quality in twin 30m3 chambers using a continuous acceptability scale. Air samples were collected immediately prior to panel assessment to quantify concentrations of C5–C10 saturated n-aldehydes and two aromatic aldehydes that are commonly produced by reaction of ozone with carpet. Perceived air quality was most acceptable and concentrations of aldehydes were lowest when only clay plaster or both clay plaster and carpet were present in the chambers without ozone. The least acceptable PAQ and the highest concentrations of aldehydes were observed when carpet and ozone were present together; addition of clay plaster for this condition improved PAQ and considerably decreased aldehyde concentrations.
Original languageEnglish
JournalBuilding and Environment
Publication date2012
Volume57
Pages370-376
ISSN0360-1323
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 2

Keywords

  • Perceived air quality, Clay, Ozone removal, Aldehyde, Passive removal, Green material
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