Skin and breath emissions as a source of indoor air pollution in a classroom

TY - GEN

T1 - Skin and breath emissions as a source of indoor air pollution in a classroom

AU - Kruza, Magdalena

AU - Lewis, Alastair C.

AU - Carslaw, Nicola

N1 - Funding Information: This research is part of Cutting - Edge Approaches for Pollution Assessment in Cities (CAPACITIE) project, which has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 608014. Funding Information: This research is part of Cutting - Edge Approaches for Pollution Assessment in Cities (CAPACITIE) project, which has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 608014. Publisher Copyright: © 2018 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018. All rights reserved. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2018

Y1 - 2018

N2 - The skin surface is an important sink for ozone and also, a source of secondary pollutants indoors. Exposure to these pollutants can have health impacts, particularly in highly occupied spaces. This paper evaluates skin and breath emissions in a typical classroom, using a detailed chemical model (INDCM). The results show that whilst emissions from skin are enhanced when the ventilation rate and hence ozone concentration is higher indoors, breath emissions become more significant when ventilation rates are lower. For instance, the predicted isoprene (from breath emissions) concentration decreased from ~5 to ~2 ppb when the air exchange rate increased from 0.6 to 1.8 h-1, whilst the concentration of nonanal increased from~5.5 ppb to ~7.5 ppb as outdoor ozone concentrations were higher for higher ventilation rates. It was also found that the presence of people indoors affected the oxidation chemistry indoors such that occupancy led to lower concentrations of oxidants and higher concentrations of organic nitrated material.

AB - The skin surface is an important sink for ozone and also, a source of secondary pollutants indoors. Exposure to these pollutants can have health impacts, particularly in highly occupied spaces. This paper evaluates skin and breath emissions in a typical classroom, using a detailed chemical model (INDCM). The results show that whilst emissions from skin are enhanced when the ventilation rate and hence ozone concentration is higher indoors, breath emissions become more significant when ventilation rates are lower. For instance, the predicted isoprene (from breath emissions) concentration decreased from ~5 to ~2 ppb when the air exchange rate increased from 0.6 to 1.8 h-1, whilst the concentration of nonanal increased from~5.5 ppb to ~7.5 ppb as outdoor ozone concentrations were higher for higher ventilation rates. It was also found that the presence of people indoors affected the oxidation chemistry indoors such that occupancy led to lower concentrations of oxidants and higher concentrations of organic nitrated material.

KW - Breath emissions surface interactions

KW - Indoor air chemistry

KW - Ozone

KW - Skin emissions

UR - http://www.scopus.com/inward/record.url?scp=85105661479&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85105661479

T3 - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018

BT - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018

PB - International Society of Indoor Air Quality and Climate

T2 - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018

Y2 - 22 July 2018 through 27 July 2018

ER -