title: Emission of titanium dioxide nanoparticles from building materials to the environment by wear and weather.
abstract: In the present work, we investigate the effect of weathering duration on a commercial photocatalytic nanocoating on the basis of its nanoparticle emission tendency into two media, air and water. It is found that increased weathering duration results in stepwise structural deterioration of the nanocoating, which in turn decreases the nanocoating life, changes the nanocoating removal mechanism, and increases the particle emission concentration. Emission of free TiO2 nanoparticles is found to be weathering duration dependent. Three quantities are introduced: emission transition pace (ETP), stable emission level (SEL), and stable emission duration (SED). By linear extrapolation of these quantities from short weathering durations, complete failure of the nanocoatings can be predicted and, moreover, the potential increase of nanoparticles release into the air.
authors.affiliation: Institut National de l'Environnement Industriel et des Risques , Parc Technologique Alata BP 2, 60550 Verneuil-en-Halatte, France.
authors.forename: Neeraj
authors.initials: N
authors.lastname: Shandilya
authors.forename: Olivier
authors.initials: O
authors.lastname: Le Bihan
authors.forename: Christophe
authors.initials: C
authors.lastname: Bressot
authors.forename: Martin
authors.initials: M
authors.lastname: Morgeneyer
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D003252:Construction Materials / Q000032:analysis* / Q000706:statistics & numerical data; D019544:Equipment Failure Analysis / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry*; D052638:Particulate Matter / Q000032:analysis*; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D014887:Weather
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; C009495:titanium dioxide; D014025:Titanium