Particle emission rates during electrostatic spray deposition of TiO 2 nanoparticle-based photoactive coating.

Autor: Koivisto AJ; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark. Electronic address: jok@nfa.dk., Jensen ACØ; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Kling KI; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Kling J; Center for Electron Nanoscopy, Technical University of Denmark, Fysikvej 307, DK-2800 Kgs., Lyngby, Denmark., Budtz HC; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Koponen IK; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Tuinman I; TNO, CBRN Protection, Lange Kleiweg 137, 2288 GJ, Rijswijk, Netherlands., Hussein T; The University of Jordan, Faculty of Science, Department of Physics, Amman, JO-11942 Jordan., Jensen KA; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Nørgaard A; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark., Levin M; National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen, DK-2100, Denmark; ACT. Global, Kajakvej 2, 2770, Kastrup, Denmark.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2018 Jan 05; Vol. 341, pp. 218-227. Date of Electronic Publication: 2017 Jul 29.
DOI: 10.1016/j.jhazmat.2017.07.045
Abstrakt: Here, we studied the particle release rate during Electrostatic spray deposition of anatase-(TiO 2 )-based photoactive coating onto tiles and wallpaper using a commercially available electrostatic spray device. Spraying was performed in a 20.3m 3 test chamber while measuring concentrations of 5.6nm to 31μm-size particles and volatile organic compounds (VOC), as well as particle deposition onto room surfaces and on the spray gun user hand. The particle emission and deposition rates were quantified using aerosol mass balance modelling. The geometric mean particle number emission rate was 1.9×10 10 s -1 and the mean mass emission rate was 381μgs -1 . The respirable mass emission-rate was 65% lower than observed for the entire measured size-range. The mass emission rates were linearly scalable (±ca. 20%) to the process duration. The particle deposition rates were up to 15h -1 for <1μm-size and the deposited particles consisted of mainly TiO 2 , TiO 2 mixed with Cl and/or Ag, TiO 2 particles coated with carbon, and Ag particles with size ranging from 60nm to ca. 5μm. As expected, no significant VOC emissions were observed as a result of spraying. Finally, we provide recommendations for exposure model parameterization.
(Copyright © 2017 The Author(s). Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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