Eco-Efficient Coatings for Healthy Indoors: Ozone Deposition Velocities, Primary and Secondary Emissions
Sponsor
This research was supported by Portuguese Foundation for Science and Technology (FCT- Fundaç˜ao para a Ciˆencia e a Tecnologia): PD/BD/150399/2019 – 1st author Doctoral Training Program EcoCoRe. The authors are also grateful for FCT support through funding UIDB/04625/2020 of the research unit CERIS.
Published In
Building and Environment
Document Type
Citation
Publication Date
4-15-2024
Abstract
Volatile organic compounds (VOCs) and ozone (O3) are harmful pollutants present in indoor air. Indoor concentrations of VOCs are typically higher than outdoors, due to the presence of indoor sources like building materials and ozone-surface reactions. The study aims to identify and quantify the ozone reactivity and primary and secondary emissions of different indoor coatings. The coatings selected for the study were three gypsum-based plastering mortar, with and without the addition of a bio-waste from Acacia dealbata (raw bark, BA, and bark heated at 250°C, BA250), two clay plasters (one with sand and the other with seashells as additional aggregate), applied both as basecoat and topcoat (on drywall), and one un-coated drywall. All the products tested had ozone deposition velocities that would reduce the indoor ozone concentration meaningfully if implemented in a real indoors, contributing to the improvement of indoor air quality. The gypsum-based plaster shows the lowest ozone deposition velocity, but also the lowest primary and secondary emissions. The addition of bark, either BA or BA250, increased by 50% the ozone deposition velocity of the coating but also increased primary and secondary emissions by 80% (BA) and 200% (BA250), with methanol (m/z 33.030) accounting for about 60% of the increase. The addition of crushed seashells to the formulation of the clay-based plasters lowered the secondary emission yields (102% and 120% respectively, when applied as base and topcoat).
Rights
© 2024 Elsevier Ltd.
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DOI
10.1016/j.buildenv.2024.111306
Persistent Identifier
https://archives.pdx.edu/ds/psu/42146
Publisher
Elsevier
Citation Details
Ranesi, A., Faria, P., Veiga, M. R., & Gall, E. T. (2024). Eco-efficient coatings for healthy indoors: Ozone deposition velocities, primary and secondary emissions. Building and Environment, 111306.