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http://dx.doi.org/10.11629/jpaar.20022.18.1.011

Development of Optimal Antiviral Coating Method for the Air Filtration System of Subway Station  

Park, Dae Hoon (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Hwang, Jungho (Department of Mechanical Engineering, Yonsei University)
Shin, Dongho (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Kim, Younghun (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Lee, Gunhee (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Park, Inyong (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Kim, Sang Bok (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Hong, Keejung (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Han, Bangwoo (Department of Environmental Machinery, Korea Institute of Machinery and Materials)
Publication Information
Particle and aerosol research / v.18, no.1, 2022 , pp. 9-21 More about this Journal
Abstract
In this study, a novel antiviral coating method for the air filtration system of subway station was investigated. Using dry aerosol coating process, we developed a high-performance antiviral air filter with spark discharger and carbon brush type ionizer. Silver nanoparticles were produced by a spark discharge generation system with ion injection system and were used as antiviral agents coated onto a medium grade air filter. The pressure drop, filtration efficiency, and antiviral ability of the filter against aerosolized MS2 virus particles as a surrogate of SARS-CoV-2 virus were tested with dust contamination. Dust contamination caused the increase of the filtration efficiency and pressure drop, while the antiviral agents (in this study, silver nanoparticles) coating did not have any significant effect on the filtration efficiency and pressure drop. Using these properties, we suggested a novel method to maximize the antiviral performance of the antiviral air filter that was contaminated by dust particles. Moreover theoretical analysis of antiviral ability with dust contamination and re-coated antiviral agents was carried out using a mathematical model to calculate the time-dependent antiviral effect of the filter under actual conditions of subway station. Our model can be used to apply on antiviral air filtration system of subway station for prevention of pandemic diffusion, and predict the life cycle of an antiviral filter.
Keywords
Antiviral air filter; Bioaerosols; Air filtration system; Indoor air quality; Subway station;
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