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

Title
Development and evaluation of antimicrobial activated carbon fiber filters using Sophora flavescens nanoparticles
Authors
심경미김경환황기병서성철배귀남정재희
Keywords
Activated carbon fiber (ACF) filter; Antimicrobial air filter; Nanoparticles; Bioaerosols; Sophora flavescens; Air filtration
Issue Date
2014-09
Publisher
The Science of the total environment
Citation
VOL 493, 291-297
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/47749
ISSN
00489697
Appears in Collections:
KIST Publication > Article
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