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The Generation, Transmission, and Removal of Bioaerosols
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The Generation, Transmission, and Removal of Bioaerosols

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Environmental Health".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 2759

Special Issue Editors

Prof. Dr. Zhijian Liu

E-Mail Website
Guest Editor
Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Interests: bioaerosol transmission; bioaerosol exposure risks; ventilation quality; human health; biosafety
Special Issues, Collections and Topics in MDPI journals
Dr. Chenxing Hu

E-Mail Website
Co-Guest Editor
Department of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: bioaerosol transmission; bioaerosol behavior in community and urban scale; bioaerosol exposure risks; data-driven algorithms; data assimilation
Dr. Junzhou He

E-Mail Website
Co-Guest Editor
Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Interests: exposure risks; indoor air quality; building ventilation; disinfection; ozone; CFD; transportation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since December 2019, coronavirus disease 2019 (COVID-19) has spread rapidly around the world. The sudden emergence of SARS-CoV-2 variants such as Delta and Omicron has once again made the global prevention and control situation challenging. Therefore, effectively slowing down its transmission, including through the use of face masks and keeping social distance, has become an extraordinary challenge worldwide. To expand the scientific underpinnings, understanding the characteristics of bioaerosols associated with all possible transmission becomes more urgently desired than ever.

The generation, transmission, and removal of bioaerosols is a Special Issue of International Journal of Environmental Research and Public Health, and provides a forum for the latest scientific and technological advances in the characteristics of bioaerosols for promoting the formulation of slowing down the transmission of pathogens, especially because SARS-CoV-2 transmission is receiving more attention than ever. This Special Issue focuses on the generation of bioaerosols in different types of environments, the transmission characteristics of the bioaerosols, and the removal technologies of the bioaerosols.

Fields of interest include:

  • Bioaerosols generation during sneezing, coughing, talking, and breathing;
  • Bioaerosols generation from human behaviors;
  • Bioaerosols generation from emergency release;
  • Experimental measurement of bioaerosols;
  • Advanced numerical simulation of bioaerosols;
  • Indoor transmission of bioaerosols;
  • Bioaerosols’ behaviors at community and urban scale;
  • Prediction and detection methodology;
  • Protective measures against bioaerosols;
  • Disinfection technology;
  • Disinfection effect assessment.

Prof. Dr. Zhijian Liu
Dr. Chenxing Hu
Dr. Junzhou He
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioaerosols generation and transmission
  • computational fluid dynamics (CFD)
  • disinfection
  • risk assessment
  • indoor air quality
  • urban biosafety

Published Papers (2 papers)

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Research

11 pages, 2004 KiB  
Article
Three Experimental Common High-Risk Procedures: Emission Characteristics Identification and Source Intensity Estimation in Biosafety Laboratory
by Zhijian Liu, Jiabin Lv, Zheng Zhang, Juntao Ma, Yangfan Song, Minnan Wu, Guoqing Cao and Jiacheng Guo
Int. J. Environ. Res. Public Health 2023, 20(5), 4479; https://doi.org/10.3390/ijerph20054479 - 2 Mar 2023
Cited by 1 | Viewed by 1220
Abstract
Biosafety laboratory is an important place to study high-risk microbes. In biosafety laboratories, with the outbreak of infectious diseases such as COVID-19, experimental activities have become increasingly frequent, and the risk of exposure to bioaerosols has increased. To explore the exposure risk of [...] Read more.
Biosafety laboratory is an important place to study high-risk microbes. In biosafety laboratories, with the outbreak of infectious diseases such as COVID-19, experimental activities have become increasingly frequent, and the risk of exposure to bioaerosols has increased. To explore the exposure risk of biosafety laboratories, the intensity and emission characteristics of laboratory risk factors were investigated. In this study, high-risk microbe samples were substituted with Serratia marcescens as the model bacteria. The resulting concentration and particle size segregation of the bioaerosol produced by three experimental procedures (spill, injection, and sample drop) were monitored, and the emission sources’ intensity were quantitatively analyzed. The results showed that the aerosol concentration produced by injection and sample drop was 103 CFU/m3, and that by sample spill was 102 CFU/m3. The particle size of bioaerosol is mainly segregated in the range of 3.3–4.7 μm. There are significant differences in the influence of risk factors on source intensity. The intensity of sample spill, injection, and sample drop source is 3.6 CFU/s, 78.2 CFU/s, and 664 CFU/s. This study could provide suggestions for risk assessment of experimental operation procedures and experimental personnel protection. Full article
(This article belongs to the Special Issue The Generation, Transmission, and Removal of Bioaerosols)
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Graphical abstract

9 pages, 1728 KiB  
Article
Measured Air Flow Leakage in Facemask Usage
by Poul S. Larsen, John Heebøll and Knud Erik Meyer
Int. J. Environ. Res. Public Health 2023, 20(3), 2363; https://doi.org/10.3390/ijerph20032363 - 29 Jan 2023
Cited by 4 | Viewed by 1161
Abstract
The importance of wearing a facemask during a pandemic has been widely discussed, and a number of studies have been undertaken to provide evidence of a reduced infectious virus dose because of wearing facemasks. Here, one aspect that has received little attention is [...] Read more.
The importance of wearing a facemask during a pandemic has been widely discussed, and a number of studies have been undertaken to provide evidence of a reduced infectious virus dose because of wearing facemasks. Here, one aspect that has received little attention is the fraction of breathing flow that is not filtered because it passes as leak flow between the mask and face. Its reduction would be beneficial in reducing the dose response. The results of the present study include the filter material pressure loss parameters, pressure distributions under masks, and the fraction of breathing flow leaked versus steady breathing flow in the range of 5 to 30 L min−1, for two commonly used facemasks mounted on mannequins, in the usual ‘casual’ way and in a ‘tight’ way by means of three different fitters placed over the mask to improve the seals. For the ‘casual’ mount, leaks were high: 83% to 99% for both masks at both exhalation and inhalation flows. For the ‘tight’ mount with different fitters, the masks showed different lower levels in the range of 18 to 66% of leakage, which, for exhalation, were nearly independent of flow rate, while for inhalation, were decreasing with increasing rates of respiration flows, probably because suction improved the sealing. In practice, masks are worn in a ‘casual’ mount, which would imply that nearly all contagious viruses found in aerosols small enough to follow air streams would be exhaled to and inhaled from the ambient air. Full article
(This article belongs to the Special Issue The Generation, Transmission, and Removal of Bioaerosols)
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