Inactivation Efficiency of Bioaerosols Using Carbon Nanotube Plasma

Yang, Shu; Huang, Yi‐Chin; Luo, Chin-Hsiang; Lin, Yi-Chang; Huang, Jhih-Wei; Chuang, Cheng-Ping Jimmy; Chen, Chiou-Jong; Fang, Wei; Chuang, Cheng-Min

doi:10.1002/clen.201000142

Cited by 14 publications

(8 citation statements)

References 26 publications

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“…Can SARS-CoV-2 and phage particles be compared? and other bacteriophages have been used as surrogates for eukaryotic viruses in many instances (Black et al 2010;Chen et al 2004;Kormuth et al 2018;Yang et al 2011;Turgeon et al 2014). In terms of size, the circular SARS-CoV-2 has a diameter of 100 nm, while the phage has an icosahedral head with about 60 nm in diameter, and a non-contractile tail with about 150 nm in length (Furth et al 1983;Hendrix and Casjens 2005).…”

Section: Discussionmentioning

confidence: 99%

Bacteriophages as surrogates for the study of viral dispersion in open air

et al. 2021

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The SARS-CoV-2 pandemic has revived the debate about the routes of virus transmission and their likelihoods. It is of utmost importance to assess the risks of contamination of susceptible people by infectious individuals and to evaluate the level of SARS-CoV-2 and other respiratory viruses transmission in the community. Most countries have imposed non-pharmaceutical measures to contain SARS-CoV-2 transmission, including physical distancing and mask wearing. Here we evaluated the spreading of viruses in open air using harmless Escherichia coli bacteriophages as a surrogate. Phages were sprayed towards Petri dishes seeded with bacteria at different lengths and angles. Our results showed that the transmission rate decreased exponentially with distance. The highest recorded transmission rate was 9 × 10 −6 PFU/plate when phages were sprayed from a 1 m distance, suggesting that the probability of transmission of a single virus at a 1 m distance is 1:100,000.

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Section: Discussionmentioning

confidence: 99%

Bacteriophages as surrogates for the study of viral dispersion in open air

et al. 2021

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“…Hence, the CNT-corona discharge system can produce a low operating voltage and yield a low ozone concentration, which can be used to eradicate bioaerosols. The corona discharge system employing CNTs was reported to inactivate 97% of E. coli bioaerosol cells at discharge voltages of −7.5 kV, that is significantly higher than using stainless steel electrodes (the inactivation efficiency is 34% at the same voltages) [ 91 ]. The electrode behavior can be expanded further by integrating CNSs with several dielectric polymers such as polydimethylsiloxane (PDMA) and polyvinylidene fluoride (PVDF) fibers, which can be used for several applications (e.g., nanoscale aerosol filters, biomedical implants, artificial muscles and robots, sensors) [ 92 , 93 ].…”

Section: Fullerenementioning

confidence: 99%

Review on the Antimicrobial Properties of Carbon Nanostructures

et al. 2017

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Swift developments in nanotechnology have prominently encouraged innovative discoveries across many fields. Carbon-based nanomaterials have emerged as promising platforms for a broad range of applications due to their unique mechanical, electronic, and biological properties. Carbon nanostructures (CNSs) such as fullerene, carbon nanotubes (CNTs), graphene and diamond-like carbon (DLC) have been demonstrated to have potent broad-spectrum antibacterial activities toward pathogens. In order to ensure the safe and effective integration of these structures as antibacterial agents into biomaterials, the specific mechanisms that govern the antibacterial activity of CNSs need to be understood, yet it is challenging to decouple individual and synergistic contributions of physical, chemical and electrical effects of CNSs on cells. In this article, recent progress in this area is reviewed, with a focus on the interaction between different families of carbon nanostructures and microorganisms to evaluate their bactericidal performance.

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“…However, the ultraviolet germicidal irradiation may also generate a secondary pollutant (ozone and nitrogen oxides) and subsequently cause the air quality to deteriorate. Yang et al [ 7 ] investigated the ability of a carbon nanotube (CNT) corona discharge plasma system to inactivate bioaerosols. The inactivation efficiencies of E. coli , B. subtilis, and λ virus bioaerosols using CNT corona discharge plasma were as high as 93%, 88%, and 81%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Bioaerosol Inactivation Ability of Chitosan-Coated Antimicrobial Filters

Hsu

Chuang

Yang

2021

IJERPH

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This work considers the enhancement of indoor bioaerosol removal efficiency by liquid coating of the antimicrobial agent chitosan onto polypropylene fibrous filters (CCFs). Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) were chosen as the tested bioaerosols. The results revealed that 2.5% (w/w) of CCFs have significantly higher bioaerosol survival capability (23% and 34% of E. coli and B. subtilis, respectively), compared to an untreated filter (65% and 64% for E. coli and B. subtilis, respectively). Increasing face velocity and relative humidity during operating CCFs could reduce the bioaerosol removal capability. The regression analysis of the experimental findings demonstrated that the higher coating concentration of chitosan had the most positive influence on bioaerosol removal, while the face velocity and relative humidity had a negative influence, but a milder effect was observed (R2 = 0.83 and 0.81 for E. coli and B. subtilis bioaerosols, respectively). A CCF-loaded air-cleaning device was tested in a real indoor environment and resulted in 80.1% bioaerosol removal within 3 h of operating, which suggests that the chitosan-coated filter has the potential for further application in improving indoor air quality in the future.

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Inactivation Efficiency of Bioaerosols Using Carbon Nanotube Plasma

Cited by 14 publications

References 26 publications

Bacteriophages as surrogates for the study of viral dispersion in open air

Bacteriophages as surrogates for the study of viral dispersion in open air

Review on the Antimicrobial Properties of Carbon Nanostructures

Evaluation of the Bioaerosol Inactivation Ability of Chitosan-Coated Antimicrobial Filters

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