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3. Quantifying Emission Factors and Setting Conditions of Use According to ECHA Chapter R.14 for a Spray Process Designed for Nanocoatings—A Case Study

Author

Koivisto, Antti Joonas, primary, Del Secco, Benedetta, additional, Trabucco, Sara, additional, Nicosia, Alessia, additional, Ravegnani, Fabrizio, additional, Altin, Marko, additional, Cabellos, Joan, additional, Furxhi, Irini, additional, Blosi, Magda, additional, Costa, Anna, additional, Lopez de Ipiña, Jesús, additional, and Belosi, Franco, additional

Published
2022
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6. Measurements of SARS-CoV-2 RNA Concentrations in Indoor and Outdoor Air in Italy: Implications for the Role of Airborne Transmission

Author

Chirizzi, Daniela, primary, Conte, Marianna, additional, Feltracco, Matteo, additional, Trabucco, Sara, additional, Dinoi, Adelaide, additional, Gregoris, Elena, additional, Barbaro, Elena, additional, La Bella, Gianfranco, additional, Ciccarese, Giuseppina, additional, Belosi, Franco, additional, La Salandra, Giovanna, additional, Gambaro, Andrea, additional, and Contini, Daniele, additional

Published
2021
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7. Source Apportionment of PM2.5 and of its Oxidative Potential in an Industrial Suburban Site in South Italy

Author

Cesari, Daniela, primary, Merico, Eva, additional, Grasso, Fabio Massimo, additional, Decesari, Stefano, additional, Belosi, Franco, additional, Manarini, Francesco, additional, De Nuntiis, Paola, additional, Rinaldi, Matteo, additional, Volpi, Francesca, additional, Gambaro, Andrea, additional, Morabito, Elisa, additional, and Contini, Daniele, additional

Published
2019
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10. Measuring TiO 2 N and AgHEC Airborne Particle Density during a Spray Coating Process.

Author

Trabucco S, Koivisto AJ, Ravegnani F, Ortelli S, Zanoni I, Blosi M, Costa AL, and Belosi F

Abstract

Effective particle density is a key parameter for assessing inhalation exposure of engineered NPs in occupational environments. In this paper, particle density measurements were carried out using two different techniques: one based on the ratio between mass and volumetric particle concentrations; the other one based on the ratio between aerodynamic and geometric particle diameter. These different approaches were applied to both field- and laboratory-scale atomization processes where the two target NPs (N-doped TiO 2 , TiO 2 N and AgNPs capped with a quaternized hydroxyethylcellulose, AgHEC) were generated. Spray tests using TiO 2 N were observed to release more and bigger particles than tests with AgHEC, as indicated by the measured particle mass concentrations and volumes. Our findings give an effective density of TiO 2 N particle to be in a similar range between field and laboratory measurements (1.8 ± 0.5 g/cm 3 ); while AgHEC particle density showed wide variations (3.0 ± 0.5 g/cm 3 and 1.2 + 0.1 g/cm 3 for field and laboratory campaigns, respectively). This finding leads to speculation regarding the composition of particles emitted because atomized particle fragments may contain different Ag-to-HEC ratios, leading to different density values. A further uncertainty factor is probably related to low process emissions, making the subtraction of background concentrations from AgHEC process emissions unreliable.

Published
2022
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