Photocatalytic Composite Nanomaterial and Engineering Solution for Inactivation of Airborne Bacteria

Даниленко, И. А.; Gorban, Oksana; Pedro, Paulo Miguel da Costa Zaragoza de Oliveira; Viegas, João Carlos; Shapovalova, Olesya; Akhkozov, Leonid; Konstantinova, Tetyana; Lyubchik, Svetlana B.

doi:10.1007/s11244-020-01291-2

Cited by 23 publications

(14 citation statements)

References 16 publications

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“…Its use, in conjunction with the air curtains, can ensure a proper separation between the spaces that are to be kept free of cross contamination. The development of the nanomaterial-based technology to clean the air was presented elsewhere 9 and falls outside the scope of this paper.…”

Section: Introductionmentioning

confidence: 99%

Full-size experimental assessment of the aerodynamic sealing of air curtains for particulate matter

Viegas

Kaluzny²,

Durand³

et al. 2020

Building Services Engineering Research and Technology

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An air curtain is used to ensure an adequate separation between two compartments that is aimed to restrict, a clean one and a contaminated one. The air curtain performance is improved with the use of an air extraction from the “contaminated” compartment. The aerodynamic sealing of an optimized air curtain is assessed regarding particulate matter. The evaluation using visual assessment of the aerodynamic sealing using a cold smoke source is validated against PM 10 detection. It is shown that the air curtain presents a good aerodynamic sealing for the particulate of PM10 and PM2.5 classes and that the visual assessment method can lead to similar results. An equation was obtained with a view to be used to predict the level of aerodynamic sealing of the air curtain when the exhaust rate becomes too low. Another equation was obtained for predicting the average velocity through the door protected by the air curtain required to obtain an aerodynamic sealing, as a function of the jet parameters (nozzle average velocity and thickness). These test results prove that the air curtain, complemented with an air exhaust from the “contaminated compartment”, is suitable to provide an acceptable aerodynamic sealing for the particulate matter. Practical application: The findings of this research are applicable when it is necessary to retain the contamination due to particulate matter using a soft boundary, as air plane jets. This is applicable to medical care centres to reduce the possibility of contamination due to bacteria between different compartments or in pharmaceutical process units to avoid cross contamination among them.

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Section: Introductionmentioning

confidence: 99%

Full-size experimental assessment of the aerodynamic sealing of air curtains for particulate matter

Viegas

Kaluzny²,

Durand³

et al. 2020

Building Services Engineering Research and Technology

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“…Fluids 2021, 6, x FOR PEER REVIEW 2 of 25 to clean the air was presented by Danilenko et al [25] and falls outside the aim of this paper.…”

Section: Introductionmentioning

confidence: 94%

“…The development of this engineering solution required not only an advanced nanomaterial-based oxidation process to kill bacteria in the air in a compartment, but also an air curtain to provide a separation between the spaces that were to be kept free of cross contamination. The development of the nanomaterial-based technology to clean the air was presented by Danilenko et al [25] and falls outside the aim of this paper.…”

Section: Introductionmentioning

confidence: 99%

Full-Size Experimental Assessment of the Aerodynamic Sealing of Low Velocity Air Curtains

Viegas

Carrasco

Pinto

et al. 2021

Fluids

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Vertical air curtains are often used to separate two different zones to reduce contaminant transfer or even to provide aerodynamic sealing from one zone to the other. In this isothermal full-size experimental research work, the contaminant transfer between zones is reduced using an air extraction from the “contaminated” compartment and an air curtain. This work correlates the minimum exhaust air flow rate required to reach the aerodynamic sealing at the opening connecting two different zones with the jet nozzle velocity for small nozzle thicknesses (5 mm, 10 mm and 16 mm), particularly for Reynolds numbers below 3800. Following the experimental study, a general physical law that relates the jet parameters (angle, nozzle thickness and jet velocity at the nozzle) with the average velocity through the opening (for the condition of acceptable contaminant tightness) was obtained. The results showed that the average velocity of the flow across a door protected by an air curtain required to keep the aerodynamic sealing varies linearly with Re. The slope, however, is different below and above Re = 3820.

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“…The diversity of the bacteria present in the air in the present study may have reduced the effectiveness of RCI. Another solution, described by Danilenko et al [41], is a design model for a novel reactor for indoor air purification. A photocatalytic complex of ZnO and Ag material deposited on a grid support was tested in UV-purified air.…”

Section: Microbiological State Of the Environmentmentioning

confidence: 99%

Effect of radiant catalytic ionization on environmental conditions in rodent rooms and the haematological status of mice

Niemiec¹,

Skowron

Świderek³

et al. 2022

BMC Vet Res

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High stocking densities, closed animal houses, and elevated concentrations of bacteria, fungi, and the products of their activity, including ammonia and hydrogen sulphide, have adverse health effects. Active techniques used to reduce unfavourable environmental conditions, such as ventilation, sprinkling, bedding sorbents, and nutritional treatments, are not always sufficient to improve the animals’ living environment. The current paper aims to evaluate the effect of radiant catalytic ionization (RCI) on airborne microorganisms, cage microbiological status, gaseous ammonia concentrations, and the haematological status of mice in animal houses. After one week of operation of an RCI system, the number of airborne bacteria and fungi in the experimental room decreased in comparison to the first day of the experiment (p < 0.05 and p < 0.05 respectively), as did the concentrations of ammonia (p < 0.01) and dust. At the same time, the basic health parameters of the mice, determined in the blood, were very similar between the control and experimental room. RCI seems to be an ideal solution to ensure high hygiene standards in animal rooms and houses with limited use of disinfectants or antibiotic treatment of sick animals. An additional, environmental benefit is the limited amount of nitrogen released.

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Photocatalytic Composite Nanomaterial and Engineering Solution for Inactivation of Airborne Bacteria

Cited by 23 publications

References 16 publications

Full-size experimental assessment of the aerodynamic sealing of air curtains for particulate matter

Full-size experimental assessment of the aerodynamic sealing of air curtains for particulate matter

Full-Size Experimental Assessment of the Aerodynamic Sealing of Low Velocity Air Curtains

Effect of radiant catalytic ionization on environmental conditions in rodent rooms and the haematological status of mice

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