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Development and evaluation of antimicrobial activated carbon fiber filters using Sophora flavescens nanoparticles

Sim, Kyoung Mi and Kim, Kyung Hwan and Hwang, Gi Byoung and Seo, SungChul and Bae, Gwi-Nam and Jung, Jae Hee (2014) Development and evaluation of antimicrobial activated carbon fiber filters using Sophora flavescens nanoparticles. Science of the Total Environment, 493 . pp. 291-297. ISSN 0048-9697. doi:10.1016/j.scitotenv.2014.06.002.

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Activated carbon fiber (ACF) filters have a wide range of applications, including air purification, dehumidification, and water purification, due to their large specific surface area, high adsorption capacity and rate, and specific surface reactivity. However, when airborne microorganisms such as bacteria and fungi adhere to the carbon substrate, ACF filters can become a source of microbial contamination, and their filter efficacy declines. Antimicrobial treatments are a promising means of preventing ACF bio-contamination. In this study, we demonstrate the use of Sophora flavescens in antimicrobial nanoparticles coated onto ACF filters. The particles were prepared using an aerosol process consisting of nebulization–thermal drying and particle deposition. The extract from S. flavescens is an effective, natural antimicrobial agent that exhibits antibacterial activity against various pathogens. The efficiency of Staphylococcus epidermidis inactivation increased with the concentration of S. flavescens nanoparticles in the ACF filter coating. The gas adsorption efficiency of the coated antimicrobial ACF filters was also evaluated using toluene. The toluene-removal capacity of the ACF filters remained unchanged while the antimicrobial activity was over 90% for some nanoparticle concentrations. Our results provide a scientific basis for controlling both bioaerosol and gaseous pollutants using antimicrobial ACF filters coated with S. flavescens nanoparticles.

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Additional Information:© 2014 Elsevier B.V. Received 14 March 2014. Received in revised form 7 May 2014. Accepted 1 June 2014. Available online 18 June 2014. Editor: Pavlos Kassomenos. This researchwas supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning, South Korea (2013K000386).
Funding AgencyGrant Number
National Research Foundation of KoreaUNSPECIFIED
Ministry of Science, ICT and Future Planning (Korea)2013K000386
Subject Keywords:Activated carbon fiber (ACF) filter; Sophora flavescens; Air filtration; Nanoparticles
Record Number:CaltechAUTHORS:20140911-144242805
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Official Citation:Kyoung Mi Sim, Kyung Hwan Kim, Gi Byoung Hwang, SungChul Seo, Gwi- Nam Bae, Jae Hee Jung, Development and evaluation of antimicrobial activated carbon fiber filters using Sophora flavescens nanoparticles, Science of The Total Environment, Volume 493, 15 September 2014, Pages 291-297, ISSN 0048-9697, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49621
Deposited By: Ruth Sustaita
Deposited On:11 Sep 2014 22:00
Last Modified:10 Nov 2021 18:46

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