Effects of Electric Field Strength on an Antimicrobial Air Filter

Hwang, Gi Byoung; Park, Hyun-Seol; Jung, Jae Hee

doi:10.4209/aaqr.2013.06.0199

Cited by 4 publications

(5 citation statements)

References 40 publications

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“…It has previously been shown that filtration efficiency increases with the surrounding electric field strength (Hwang et al, 2014). As shown in Figs.…”

Section: Filtration Efficiency Of the Nanosized Kcl Aerosolmentioning

confidence: 88%

“…The antimicrobial effect was sustained regardless of the filter recharging process. Previous studies have indicated that the inactivation efficiency of an antimicrobial filter increases with an increase in the antimicrobial particle concentration (Hwang et al, 2014;Jung et al, 2011). The S. flavescens nanoparticle concentration deposited on the filter per unit cross-sectional filter surface area was approximately 1.36 × 10 10 particles/cm 2 filter .…”

Section: Antimicrobial Efficacy and Pressure Drop Of The Antimicrobiamentioning

confidence: 98%

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Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop

Sim

Park

Bae

et al. 2015

Science of The Total Environment

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“…It has previously been shown that filtration efficiency increases with the surrounding electric field strength (Hwang et al, 2014). As shown in Figs.…”

Section: Filtration Efficiency Of the Nanosized Kcl Aerosolmentioning

confidence: 88%

Section: Antimicrobial Efficacy and Pressure Drop Of The Antimicrobiamentioning

confidence: 98%

Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop

Sim

Park

Bae

et al. 2015

Science of The Total Environment

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“…The electrostatic activation may help to increase electrostatic interaction between the filter and the microorganism. Hwang et al [51] determined the effect of surrounding electric field (EF) on antimicrobial air filters performance. The antimicrobial filter was coated by natural products nanoparticles.…”

Section: Antimicrobial Air Filtermentioning

confidence: 99%

Recent advances in antimicrobial air filter

et al. 2018

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The worsening air quality has become an environmental issue since it has a serious effect on human health. This is generally attributed to airborne particles including various pathogens and others fine particles. Even though air filters show excellent removal efficiency towards pathogens, the captured microorganism can remain viable in the filter, grow, and re-suspended into an air stream resulting in a secondary source of pollutants. Considerable studies have been conducted to develop air filters which also have antibacterial properties for solving this issue. Results of several studies showed that air filters with antimicrobial activities have been successfully prepared by incorporating inorganic nanoparticles and natural plant extracts. With antibacterial properties, the air filters may be potentially used to control air quality, particularly for indoor spaces e.g. hospitals, by removing fine particles and inhibiting microorganism. In this paper, the recent development of antimicrobial air filter is reviewed. In addition, preparation and performance of developed antimicrobial filters are discussed. Prospects and challenges of antimicrobial air filter are also pointed out.

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“…As there is a trade-off between particle removal efficiency and pressure drop, there have been numerous efforts to improve particle removal efficiency of filters without increasing their pressure drop. For example, the electrostatic air filter, which consists of dielectric materials with a quasi-permanent electrical charge, can enhance particle capture by Coulombic attraction and dielectrophoresis without increasing the pressure drop. , However, the lifetime of electrostatic air filters is relatively short because the electrostatic charge on fiber dissipates as airborne dust is deposited on the filter.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the electrostatic air filter, which consists of dielectric materials with a quasi-permanent electrical charge, can enhance particle capture by Coulombic attraction and dielectrophoresis without increasing the pressure drop. 14,15 However, the lifetime of electrostatic air filters is relatively short because the electrostatic charge on fiber dissipates as airborne dust is deposited on the filter.…”

Section: ■ Introductionmentioning

confidence: 99%

Electrospun Magnetic Nanoparticle-Decorated Nanofiber Filter and Its Applications to High-Efficiency Air Filtration

Kim

Hong

Bae

et al. 2017

Environ. Sci. Technol.

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Filtration technology has been widely studied due to concerns about exposure to airborne dust, including metal oxide nanoparticles, which cause serious health problems. The aim of these studies has been to develop mechanisms for the continuous and efficient removal of metal oxide dusts. In this study, we introduce a novel air filtration system based on the magnetic attraction force. The filtration system is composed of a magnetic nanoparticle (MNP)-decorated nanofiber (MNP-NF) filter. Using a simple electrospinning system, we fabricated continuous and smooth electrospun nanofibers with evenly distributed FeO MNPs. Our electrospun MNP-NF filter exhibited high particle collection efficiency (∼97% at 300 nm particle size) compared to the control filter (w/o MNPs, ∼ 68%), with a ∼ 64% lower pressure drop (∼17 Pa) than the control filter (∼27 Pa). Finally, the filter quality factors of the MNP-NF filter were 4.7 and 11.9 times larger than those of the control filter and the conventional high-efficiency particulate air filters (>99% and ∼269 Pa), respectively. Furthermore, we successfully performed a field test of our MNP-NF filter using dust from a subway station tunnel. This work suggests that our novel MNP-NF filter can be used to facilitate effective protection against hazardous metal oxide dust in real environments.

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Effects of Electric Field Strength on an Antimicrobial Air Filter

Abstract: We investig with natural-p whereas the fi high (> 99%) deposition pro 0-68 µm was i microscopy re concentration tests, the perfo but the effect efficiency of t ncrease in bac the surface con for developing

Cited by 4 publications

References 40 publications

Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop

Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop

Recent advances in antimicrobial air filter

Electrospun Magnetic Nanoparticle-Decorated Nanofiber Filter and Its Applications to High-Efficiency Air Filtration

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