Title
Dip coating of air purifier ceramic honeycombs with photocatalytic TiO2 nanoparticles: A case study for occupational exposure
Author
Koivisto, A.J.
Kling, K.I.
Fonseca, A.S.
Brostrøm Bluhme, A.
Moreman, M.
Yu, M.
Costa, A.L.
Giovanni, B.
Ortelli, S.
Fransman, W.
Vogel, U.
Jensen, K.A.
Publication year
2018
Abstract
Nanoscale TiO2 (nTiO2) is manufactured in high volumes and is of potential concern in occupational health. Here, we measured workers exposure levels while ceramic honeycombs were dip coated with liquid photoactive nanoparticle suspension and dried with an air blade. The measured nTiO2 concentration levels were used to assess process specific emission rates using a convolution theorem and to calculate inhalation dose rates of deposited nTiO2 particles. Dip coating did not result in detectable release of particles but air blade drying released fine-sized TiO2 and nTiO2 particles. nTiO2 was found in pure nTiO2 agglomerates and as individual particles deposited onto background particles. Total particle emission rates were 420 × 109 min-1, 1.33 × 109 um2 min-1, and 3.5 mg min-1 respirable mass. During a continued repeated process, the average exposure level was 2.5 × 104 cm-3, 30.3 um2 cm-3,
Subject
ELSS - Earth, Life and Social Sciences
Life
Healthy Living
Food and Nutrition
Nanomaterial
Titanium dioxide
Indoor aerosol modeling
Inhalation exposure
Emission rate
Air cleaners
Air purification
Biological organs
Ceramic materials
Coatings
Honeycomb structures
Industrial hygiene
Nanoparticles
Nanostructured materials
Occupational risks
Particulate emissions
Respiratory system
Titanium dioxide
Deposited surface areas
Emission rates
Environmental exposure
Indoor aerosol model
Inhalation exposure
Nanoparticle suspension
National institute for occupational safety and healths
Occupational exposure
Particles (particulate matter)
Titanium dioxide nanoparticle
Aerosol
Catalysis
Ceramics
Emission
Modeling
Nanomaterial
Nanoparticle
Photochemistry
Titanium
Bronchus
Case study
Controlled study
Lung alveolus
Material coating
No-observed-adverse-effect level
Particle size
Particulate matter
Photocatalysis
Physical chemistry
Prediction
Trachea
Work environment
RAPID - Risk Analysis for Products in Development
To reference this document use:
http://resolver.tudelft.nl/uuid:84891c25-c692-4c5c-ba16-dcaa4105b468
DOI
https://doi.org/10.1016/j.scitotenv.2018.02.316
TNO identifier
787075
Source
Science of the Total Environment, 630 (630), 1283-1291
Document type
article