Visualization of the infection risk assessment of SARS-CoV-2 through aerosol and surface transmission in a negative-pressure ward

Guo, Weiqi; Fu, Yingying; Rui, Jia; Guo, Zhixin; Su, Chen; Li, Jiaming; Zhao, Xiuguo; Jin, Y. J.; Li, Penghui; Fan, Jinbo; Zhang, Cheng; Qu, Pengtao; Gao, Sheng; Cheng, Hongliang; Li, Jingjing; Li, Xiang; Lu, Bing; Xu, Xin; Wang, Zhongyi

doi:10.1016/j.envint.2022.107153

Cited by 27 publications

(9 citation statements)

References 41 publications

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“…After a patient exhales viral aerosols under the influence of airflow in the room, virus particles floating in the air may generate a potential infection risk through the aerosol route, while the virus particles deposited on the surface of the object may generate the potential infection risk through the contact route ( Liu et al, 2020 ; Guo W. et al, 2022 ). So the monitoring of viral loads in exhaled air from COVID-19 patients may give an important data for transmission prevention and control.…”

mentioning

confidence: 99%

Similar aerosol emission rates and viral loads in upper respiratory tracts for COVID-19 patients with Delta and Omicron variant infection

Zhang²,

Jiang³

et al. 2022

Virologica Sinica

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mentioning

confidence: 99%

Similar aerosol emission rates and viral loads in upper respiratory tracts for COVID-19 patients with Delta and Omicron variant infection

Zhang²,

Jiang³

et al. 2022

Virologica Sinica

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“…Because microbial concentrations in STPs are much higher than those in ordinary places, the STP was defined as a site with a potentially high risk of pathogen exposure. PM with different sizes is deposited in different parts of the human respiratory tract: 4.7-10 μm particles are deposited in the nose and pharynx, 1.1-4.7 μm particles are deposited in the trachea and bronchus, and 0.43-1.1 μm particles are deposited in alveoli (Guo et al, 2022). We defined PM 4.7-10 , PM 1.1-4.7 , and PM 0.43-1.1 as the coarse part, fine part, and very fine part, respectively.…”

Section: Characteristics Of the Pm Distributionmentioning

confidence: 99%

“…The PM concentrations at the LSPF for all particle sizes were higher than those at the CF and SSPF on the same scale (Figures 1D-G). The PM concentration may be affected by the degree of sealing and ventilation and the sources of the farm aerosols themselves, including farming scales (Shao et al, 2021;Guo et al, 2022).…”

Section: Characteristics Of the Pm Distributionmentioning

confidence: 99%

“…Therefore, the risk of aerosol transmission in non-open spaces must be studied. Current studies on pathogenic aerosols in closed places tend to focus on the community characteristics of pathogenic microorganisms or the effectiveness of various infection control measures in specific environments, such as medical settings (Lednicky et al, 2020;Wilson et al, 2020;Guo et al, 2022). However, microbial aerosols generated in the processes used in sewage treatment plants (STPs) may spread to the upper respiratory tract of employees (Gholipour et al, 2021;Ginn et al, 2021;Zieliński et al, 2021;Ma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Nonnegligible pathogenic exposure risk of coarse part of PM10 in non-open environments

Zhao

Mao²,

Cao³

et al. 2022

Front. Environ. Sci.

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In non-open environments, pathogenic microorganisms are more likely to invade the human respiratory tract due to their limited diffusion in the environment, which has received little attention. In this study, we explored the distribution characteristics of particulate matter (PM) in non-open environments, and included sewage treatment plants and farms, which are occupational exposure risks, and G-series high-speed trains and waiting rooms, which are crowded. The results showed orders of magnitude differences in PM and microbial concentrations and the DNA/PM values of adsorption in the different non-open spaces. The concentration of PM with a size in the 4.7–10.0 μm range was higher than those of PM in the 1.1–4.7 μm and 0.43–1.1 μm ranges in all three types of places, accounting for 74.64%, 46.59%, and 51.49%, respectively. The DNA/PM value for the 1.1–4.7 μm range was higher than those for PM in the other two ranges in all three types of places at 0.175, 3.78 × 10−3, and 9.98 ng/μg, respectively. Although the relative abundances of Class II potentially pathogenic bacteria with sizes ranging from 1.1 to 4.7 μm were higher in all three types of places, the total abundance and the relative abundance of identified pathogenic microorganisms with sizes ranging from 4.7 to 10.0 μm were higher in all three types of places. Here, in non-open spaces, the pathogen exposure risk associated with PM10, particularly the coarse fraction of PM10, deserves special attention. Infectious diseases caused by aerosol transmission of pathogens in non-open environments should receive more attention and require further investigation in the future.

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“…In late 2019, an epidemic of the human coronavirus disease 2019 (COVID-19) was reported in Wuhan, China, one of the world's most densely populated cities with a population of over eleven million people (Nandan et al 2021). Since then, COVID-19 has become a major global public health issue that has had a significant impact on global social development and continues to pose a significant challenge to global public health systems (Guo et al 2022). In 2020, paracetamol consumption was even higher and is recommended as the firstline treatment for fevers caused by the common cold, flu, and coronavirus (COVID-19) (Sohrabi et al 2020;Goscianska et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of the First-Line Covid Treatment Analgesic onto Activated Carbon from Residual Pods of Erythrina Speciosa

Georgin

Franco

Netto

et al. 2022

Environmental Management

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In this study, the residual pods of the forest species Erythrina speciosa were carbonized with ZnCl 2 to obtain porous activated carbon and investigated for the adsorptive removal of the drug paracetamol (PCM) from water. The PCM adsorption onto activated carbon is favored at acidic solution pH. The isothermal studies confirmed that increasing the temperature from 298 to 328 K decreased the adsorption capacity from 65 mg g −1 to 50.4 mg g −1 (C 0 = 175 mg L −1 ). The Freundlich model showed a better fit of the equilibrium isotherms. Thermodynamic studies confirmed the exothermic nature (ΔH 0 = −39.1066 kJ mol −1 ). Kinetic data indicates that the external mass transfer occurs in the first minutes followed by the surface diffusion, considering that the linear driving force model described the experimental data. The application of the material in the treatment of a simulated effluent with natural conditions was promising, presenting a removal of 76.45%. Therefore, it can be concluded that the application of residual pods of the forest species Erythrina speciosa carbonized with ZnCl 2 is highly efficient in the removal of the drug paracetamol and also in mixtures containing other pharmaceutical substances.

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Visualization of the infection risk assessment of SARS-CoV-2 through aerosol and surface transmission in a negative-pressure ward

Cited by 27 publications

References 41 publications

Similar aerosol emission rates and viral loads in upper respiratory tracts for COVID-19 patients with Delta and Omicron variant infection

Similar aerosol emission rates and viral loads in upper respiratory tracts for COVID-19 patients with Delta and Omicron variant infection

Nonnegligible pathogenic exposure risk of coarse part of PM10 in non-open environments

Adsorption of the First-Line Covid Treatment Analgesic onto Activated Carbon from Residual Pods of Erythrina Speciosa

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