Effect of Treatment with a Natural Extract of Mukdenia Rossii (Oliv) Koidz and Unipolar Ion Emission on the Antibacterial Performance of Air Filters

Lee, Dong Hoon; Jung, Jae Hee; Lee, Byung Uk

doi:10.4209/aaqr.2012.08.0211

Cited by 10 publications

(12 citation statements)

References 11 publications

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“…4 shows SEM images of filter #56 and filter #90 with GSE and propolis deposited for film attachment tests. The liquid phases of GSE and propolis were coated on to the filters and then dried on the surfaces, producing different shapes compared to other studies in which natural products were deposited on the filters in the form of already dried isolated particles (Jung et al, 2011b;Lee et al, 2013). As seen from Fig.…”

Section: Film Attachment Methods On Antimicrobial Filtersmentioning

confidence: 91%

“…Jung et al (2011b) investigated a natural plant extract from Sophora flavescens for application to antimicrobial air filters and reported that the prepared natural product on an antimicrobial filter was effective for inactivating Gram-positive bacteria such as Staphylococcus epidermidis and Bacillus subtilis. Lee et al (2013) investigated the antimicrobial effects of a natural extract of Mukdenia rossii and unipolar ion emission on air filters for use against S. epidermidis and noted that the inactivation rate was about 70% using natural extract-treated filters and was enhanced by a further 20% due to unipolar ion emission.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Han

Kang

Kim

et al. 2015

Aerosol Air Qual. Res.

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Antimicrobial air filters using a new natural product agent, grapefruit seed extract (GSE) have been investigated for application in air purifiers or heating, ventilation, and air-conditioning (HVAC) systems. The disk diffusion method was used to evaluate the antimicrobial activity of GSE, propolis, and shiitake against four bacteria: Staphylococcus aureus, Micrococcus luteus, Psedomonas aeruginosa, and Escherichia coli. The inactivation of S. aureus was then investigated on air filters treated with two natural products, GSE and propolis (selected for comparison to GSE) using two test methods based on different deposition weights.GSE displayed the highest antimicrobial activity against S. aureus, P. aeruginosa, and E. coli of the three natural products tested by the disk diffusion method. Similar inactivation rates of 58-67% for GSE and propolis air filters were observed at a relatively low deposition weight of 94-98 μg/cm 2 using the aerosol deposition method. However, the inactivation rate was considerably superior on the GSE air filter (~98%) compared to the propolis air filter (~75%) at deposition weights of 5000-8000 μg/cm 2 using the film attachment method. The inactivation rate for both GSE and propolis air filters could be expressed as an exponential function [in the form of 1 -exp(-ax b )] of the deposition weight per unit area of the natural product. The superior inactivation performance of the GSE air filter using the film attachment method was probably due to the high wettability of GSE for bacteria cultures, with a contact angle less than 20°. Therefore, GSE air filters will be more effective and economical than propolis air filters due to their high microbial activity and relatively low price.

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Section: Film Attachment Methods On Antimicrobial Filtersmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Han

Kang

Kim

et al. 2015

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

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“…Escherichia coli (Korean Collection for Type Cultures, KCTC 1039, Biological Resource Center, Korea) and Staphylococcus epidermidis (KCTC 1917) were selected as antimicrobial test bacteria. E. coli, a Gram-negative bacterium, is commonly used in bioaerosol research with S. epidermidis, which is Gram-positive [37][38][39]. The bacteria cultures of E. coli and S. epidermidis were incubated in a nutrient broth medium (beef extract 0.3% and peptone 0.5%; Becton Dickinson, Franklin Lakes, NJ, USA) at 37 • C for 24 h. Stationary-phase organisms were harvested by centrifugation (5000× g, 10 min) and washed three times with sterile distilled water.…”

Section: Preparation Of Tested Bacterial Bioaerosolsmentioning

confidence: 99%

Antimicrobial Air Filters Using Natural Sea Salt Particles for Deactivating Airborne Bacterial Particles

Jeong

Heo

Lee

2019

IJERPH

Self Cite

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We developed an antimicrobial air filter using natural sea salt (NSS) particles. Airborne NSS particles were produced via an aerosol process and were continuously coated onto the surface of an air filter under various deposition times. The filtration efficiency and bactericidal performance of the NSS-coated filter against aerosolized bacterial particles (Staphylococcus epidermidis, Escherichia coli) were evaluated quantitatively. The filtration efficiency of the tested filter ranged from 95% to 99% depending on the deposition time, and the bactericidal performance demonstrated efficiencies of more than 98% against both tested bacterial bioaerosols when the NSS deposition ratio was more than 500 μg/cm2. The experimental results indicated that the NSS-coated filters have the potential to be used as effective antimicrobial air filters for decreasing environmental exposure to microbial contaminants.

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“…NAIs were of use to remove airborne particles [19][20]. Charging particles by emitted ions and electromigration was established as the removal mechanism supported by NAIs [21][22]. Interaction between charged particles and the electric field produced by electrical discharge increased the migration velocity towards the indoor surfaces, finally aerosols were deposited on various surfaces, such as wall surfaces [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Separation Enhancement of Mechanical Filters by Adding Negative Air Ions

Yang

Huang

Luo

et al. 2017

J. Memb. Separ. Tech.

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The purpose of this work is to combine negative air ions (NAIs) and mechanical filters for removal of indoor suspended particulates. Various factors, including aerosol size (0.05-0.45 µm), face velocity (10 and 20 cm/s), species of aerosol (potassium chloride and dioctyl phthalate), relative humidity (30% and 70%), and concentrations of NAIs (2 × 10 4 , 1 × 10 5 , and 2 × 10 5 NAIs/cm 3) were considered to evaluate their effects on the aerosol collection characteristics of filters. Results show that the aerosol penetration through the mechanical filter is higher than that through the mechanical filters cooperated with NAIs. This finding implies that the aerosol removal efficiency of mechanical filters can be improved by NAIs. Furthermore, the aerosol penetration through the mechanical filters increased with the aerosol size when NAIs were added. That is due to that the aerosol is easier to be charged when its size gets larger. The results also indicate the aerosol penetration decreased with the NAIs concentration increased. Reversely, aerosol penetration through the mechanical filters increased with the face velocity under the influence of NAIs. The aerosol penetration through the filter with NAIs was no affected with relative humidity. Finally, The penetration through the filter with NAIs against solid aerosol was lower than that against liquid aerosol.

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Effect of Treatment with a Natural Extract of Mukdenia Rossii (Oliv) Koidz and Unipolar Ion Emission on the Antibacterial Performance of Air Filters

Cited by 10 publications

References 11 publications

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Antimicrobial Air Filters Using Natural Sea Salt Particles for Deactivating Airborne Bacterial Particles

Separation Enhancement of Mechanical Filters by Adding Negative Air Ions

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