Sim, Kyoung Mi Park, Hyun-Seol Bae, Gwi-Nam Jung, Jae Hee 2024-01-20T05:33:20Z 2024-01-20T05:33:20Z 2021-09-03 2015-11-15 0048-9697 https://pubs.kist.re.kr/handle/201004/124747 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 similar to 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, similar to 92.5% filtration efficiency (for a 300-nmKCl aerosol), and a similar to 0.8 mmAq pressure drop (at 13 cm/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. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER FIBROUS FILTERS AEROSOL-PARTICLES ELECTRET FILTERS TEA TREE INACTIVATION PERFORMANCE INDOOR FORCES VOLUME Antimicrobial nanoparticle-coated electrostatic air filter with high filtration efficiency and low pressure drop Article 10.1016/j.scitotenv.2015.07.003 1 SCIENCE OF THE TOTAL ENVIRONMENT, v.533, pp.266 - 274 SCIENCE OF THE TOTAL ENVIRONMENT 533 266 274 scie scopus 000360288300030 2-s2.0-84936966722 Environmental Sciences Environmental Sciences & Ecology Article FIBROUS FILTERS AEROSOL-PARTICLES ELECTRET FILTERS TEA TREE INACTIVATION PERFORMANCE INDOOR FORCES VOLUME Electrostatic air filter Antimicrobial filter Antimicrobial natural product Antimicrobial nanoparticle Air filtration Corona discharge