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Open AccessArticle

Carbon Nanotubes: Probabilistic Approach for Occupational Risk Assessment

Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio, 11–22100 Como, Italy
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Academic Editor: Emmanuel Flahaut
Nanomaterials 2021, 11(2), 409; https://doi.org/10.3390/nano11020409
Received: 31 December 2020 / Revised: 1 February 2021 / Accepted: 3 February 2021 / Published: 5 February 2021
In this study, the occupational risk assessment of carbon nanotubes (CNTs) was performed by means of a probabilistic approach. Chronic and subchronic inhalation exposure studies were retrieved during the hazard identification phase of the study. These studies were then used to obtain a guidance value (BMCh, expressed as a lognormal distribution with geometric mean ± geometric standard deviation = 10.0 ± 4.2 µg/m3) for occupational inhalation exposure to CNTs. An exposure scenario was selected from the scientific literature: three different work events (WEs) related to the production of conductive films were considered: (WE1) manufacturing of single walled carbon nanotubes films during normal operation using local exhaust ventilation (LEV); (WE2) manufacturing of SWCNT film without LEV; and (WE3) cleaning of one of the reactors. For each WE, a probability distribution function was applied, considering exposure expressed as mass concentration, as derived from three different measurement techniques. The ratio of the exposure and the BMCh distributions (i.e., the risk characterization ratio—RCR) was used to calculate the probability of occurrence of a relevant occupational risk. All the considered WEs indicated the presence of a risk (i.e., RCR distributions ≥ 1); however, only WE2 resulted in a statistically significant level of risk. View Full-Text
Keywords: SWCNTs; MWCNTs; nanotechnology; occupational exposure; occupational health; engineered nanomaterials SWCNTs; MWCNTs; nanotechnology; occupational exposure; occupational health; engineered nanomaterials
MDPI and ACS Style

Spinazzè, A.; Zellino, C.; Borghi, F.; Campagnolo, D.; Rovelli, S.; Keller, M.; Fanti, G.; Cattaneo, A.; Cavallo, D.M. Carbon Nanotubes: Probabilistic Approach for Occupational Risk Assessment. Nanomaterials 2021, 11, 409. https://doi.org/10.3390/nano11020409

AMA Style

Spinazzè A, Zellino C, Borghi F, Campagnolo D, Rovelli S, Keller M, Fanti G, Cattaneo A, Cavallo DM. Carbon Nanotubes: Probabilistic Approach for Occupational Risk Assessment. Nanomaterials. 2021; 11(2):409. https://doi.org/10.3390/nano11020409

Chicago/Turabian Style

Spinazzè, Andrea; Zellino, Carolina; Borghi, Francesca; Campagnolo, Davide; Rovelli, Sabrina; Keller, Marta; Fanti, Giacomo; Cattaneo, Andrea; Cavallo, Domenico M. 2021. "Carbon Nanotubes: Probabilistic Approach for Occupational Risk Assessment" Nanomaterials 11, no. 2: 409. https://doi.org/10.3390/nano11020409

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