2021
DOI: 10.1080/10962247.2021.1948459
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Evaluating the filtration efficiency of commercial facemasks’ materials against respiratory aerosol droplets

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Cited by 11 publications
(9 citation statements)
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“…Whiley et al ( 53 ) found that the filtration efficiency of surgical masks, N95 masks, and three-layered cotton masks was 99.3, 98.5, and 65.8%, respectively, when the size of microspheres was 2.6 μm; and that the filtration efficiency became 99.9, 99.6, and 54.4%, respectively, when the size of the microspheres was 6 μm. Patra et al ( 54 ) examined the efficiency of some commonly used face masks in filtrating microspheres sized from 0.3~10 μm, and found out that the filtration efficiency of N95 masks, which proved to be the most effective, was 91.8%; the filtration efficiency of surgical masks was 77.8%, and the filtration efficiency of one-layered T-shirt fabric masks was 64.8% and the least effective. Nonetheless, these studies showed that masks can filtrate aerosol/droplets.…”
Section: Discussionmentioning
confidence: 99%
“…Whiley et al ( 53 ) found that the filtration efficiency of surgical masks, N95 masks, and three-layered cotton masks was 99.3, 98.5, and 65.8%, respectively, when the size of microspheres was 2.6 μm; and that the filtration efficiency became 99.9, 99.6, and 54.4%, respectively, when the size of the microspheres was 6 μm. Patra et al ( 54 ) examined the efficiency of some commonly used face masks in filtrating microspheres sized from 0.3~10 μm, and found out that the filtration efficiency of N95 masks, which proved to be the most effective, was 91.8%; the filtration efficiency of surgical masks was 77.8%, and the filtration efficiency of one-layered T-shirt fabric masks was 64.8% and the least effective. Nonetheless, these studies showed that masks can filtrate aerosol/droplets.…”
Section: Discussionmentioning
confidence: 99%
“…Although the labeled particle removal efficiency of commercially available face masks is usually higher than 99%, the actual removal efficiency for exhaled particles ranged from 40% to 78% for surgical masks and 80% to 95% for N95 masks 47–50 . For surgical masks, the protection effectiveness may not be sufficiently high in environments with high infection risk.…”
Section: Discussionmentioning
confidence: 99%
“…Previous studies have measured the size‐dependent particle filtration efficiency for surgical mask and N95 mask [e.g., Ref. 47–50], ηmask,dp$$ {\eta}_{\mathrm{mask},{d}_p} $$. Since the inlet boundary was set as the outer surface of the mask, the particle concentration can be defined as Ccough,dp)(1ηmask,dp$$ {C}_{\mathrm{cough},{d}_p}\left(1-{\eta}_{\mathrm{mask},{d}_p}\right) $$ at the inlet boundary of the mask material leakages, i.e., S 2 for surgical mask and N 3 for N95 mask.…”
Section: Boundary Conditions Of Airflow From a Cough With A Maskmentioning
confidence: 99%
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“…According to Conte et al (2019), non-exhaust traffic emissions account for a sizable portion of total traffic-related emissions, particularly in the coarse mode. Being coarse mode particles, they would thus tend to settle down (Patra et al, 2021c). As a result, it is likely that the non-exhaust fraction of traffic emissions will contribute to further increasing particle concentrations at low levels.…”
Section: Accepted Manuscriptmentioning
confidence: 99%