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HERO ID
3021216
Reference Type
Journal Article
Title
Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop
Author(s)
Sim, KM; Park, HS; Bae, GN; Jung, JH
Year
2015
Is Peer Reviewed?
1
Journal
Science of the Total Environment
ISSN:
0048-9697
EISSN:
1879-1026
Volume
533
Page Numbers
266-274
Language
English
PMID
26172593
DOI
10.1016/j.scitotenv.2015.07.003
Web of Science Id
WOS:000360288300030
Abstract
In this study, we demonstrated an antimicrobial nanoparticle-coated electrostatic (ES) air filter. Antimicrobial natural-product Sophora flavescens nanoparticles were produced using an aerosol process, and were continuously deposited onto the surface of air filter media. For the electrostatic activation of the filter medium, a corona discharge electrification system was used before and after antimicrobial treatment of the filter. In the antimicrobial treatment process, the deposition efficiency of S. flavescens nanoparticles on the ES filter was ~12% higher than that on the pristine (Non-ES) filter. In the evaluation of filtration performance using test particles (a nanosized KCl aerosol and submicron-sized Staphylococcus epidermidis bioaerosol), the ES filter showed better filtration efficiency than the Non-ES filter. However, antimicrobial treatment with S. flavescens nanoparticles affected the filtration efficiency of the filter differently depending on the size of the test particles. While the filtration efficiency of the KCl nanoparticles was reduced on the ES filter after the antimicrobial treatment, the filtration efficiency was improved after the recharging process. In summary, we prepared an antimicrobial ES air filter with >99% antimicrobial activity, ~92.5% filtration efficiency (for a 300-nm KCl aerosol), and a ~0.8mmAq pressure drop (at 13cm/s). This study provides valuable information for the development of a hybrid air purification system that can serve various functions and be used in an indoor environment.
Keywords
Electrostatic air filter; Antimicrobial filter; Antimicrobial natural product; Antimicrobial nanoparticle; Air filtration; Corona discharge
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