Journal article
The Indoor Chemical Human Emissions and Reactivity (ICHEAR) project: Overview of experimental methodology and preliminary results.
- Bekö G Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark.
- Wargocki P Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark.
- Wang N Max Planck Institute for Chemistry, Mainz, Germany.
- Li M Max Planck Institute for Chemistry, Mainz, Germany.
- Weschler CJ Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark.
- Morrison G Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Langer S IVL Swedish Environmental Research Institute, Göteborg, Sweden.
- Ernle L Max Planck Institute for Chemistry, Mainz, Germany.
- Licina D Human-Oriented Built Environment Laboratory, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Fribourg, Switzerland.
- Yang S Human-Oriented Built Environment Laboratory, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Fribourg, Switzerland.
- Zannoni N Max Planck Institute for Chemistry, Mainz, Germany.
- Williams J Max Planck Institute for Chemistry, Mainz, Germany.
- 2020-05-20
Published in:
- Indoor air. - 2020
English
With the gradual reduction of emissions from building products, emissions from human occupants become more dominant indoors. The impact of human emissions on indoor air quality is inadequately understood. The aim of the Indoor Chemical Human Emissions and Reactivity (ICHEAR) project was to examine the impact on indoor air chemistry of whole-body, exhaled, and dermally emitted human bioeffluents under different conditions comprising human factors (t-shirts/shorts vs long-sleeve shirts/pants; age: teenagers, young adults, and seniors) and a variety of environmental factors (moderate vs high air temperature; low vs high relative humidity; presence vs absence of ozone). A series of human subject experiments were performed in a well-controlled stainless steel climate chamber. State-of-the-art measurement technologies were used to quantify the volatile organic compounds emitted by humans and their total OH reactivity; ammonia, nanoparticle, fluorescent biological aerosol particle (FBAP), and microbial emissions; and skin surface chemistry. This paper presents the design of the project, its methodologies, and preliminary results, comparing identical measurements performed with five groups, each composed of 4 volunteers (2 males and 2 females). The volunteers wore identical laundered new clothes and were asked to use the same set of fragrance-free personal care products. They occupied the ozone-free (<2 ppb) chamber for 3 hours (morning) and then left for a 10-min lunch break. Ozone (target concentration in occupied chamber ~35 ppb) was introduced 10 minutes after the volunteers returned to the chamber, and the measurements continued for another 2.5 hours. Under a given ozone condition, relatively small differences were observed in the steady-state concentrations of geranyl acetone, 6MHO, and 4OPA between the five groups. Larger variability was observed for acetone and isoprene. The absence or presence of ozone significantly influenced the steady-state concentrations of acetone, geranyl acetone, 6MHO, and 4OPA. Results of replicate experiments demonstrate the robustness of the experiments. Higher repeatability was achieved for dermally emitted compounds and their reaction products than for constituents of exhaled breath.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1111/ina.12687
- PMID 32424858
- Persistent URL
- https://susi.usi.ch/global/documents/25644
Statistics
Document views: 51
File downloads: