-
Enhancement of air filter with TiO2 photocatalysis for Mycobacterium Tuberculosis removal
- Back
Metadata
Document Title
Enhancement of air filter with TiO2 photocatalysis for Mycobacterium Tuberculosis removal
Author
Thunyasirinon C., Sribenjalux P., Supothina S., Chuaybamroong P.
Name from Authors Collection
Affiliations
Graduate School, Khon Kaen University, Thailand; Department of Clinical Microbiology, Khon Kaen University, Thailand; National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Thailand; Department of Environmental Science, Thammasat University, Thailand
Type
Article
Source Title
Aerosol and Air Quality Research
ISSN
16808584
Year
2015
Volume
15
Issue
2
Page
600-610
Open Access
All Open Access, Gold, Green
Publisher
AAGR Aerosol and Air Quality Research
DOI
10.4209/aaqr.2014.01.0009
Format
Abstract
HEPA filter is normally recommended for removal of Mycobacterium tuberculosis from the airstream. Due to its high cost, a cheaper air-filter substitution is proposed in this study. Both low- and high-grade glass fiber air filters were coated with 5% TiO 2 using either polyethylene glycol (PEG), Silane (Si-69), or DURAMAX (D-3005) as a binder. The coated filter was placed in a test duct and irradiated with UVA at an intensity of 4.85 ± 0.41 mW/cm2 to investigate photocatalysis for M. tuberculosis. The effects of dark and light conditions as well as initial exposure to UVA on bacterial removal were studied. Silver-doped and iron-doped TiO 2 at different concentrations were also tested using face velocities of 0.1 and 1 m/s and humidity levels of 50 ± 10% and 70 ± 10% RH. The most appropriate binder for coating TiO2 onto filters was 3% D3005. Using 0.1% metal-doping, 100% removal efficiencies were found. Dark/light conditions affected the hydrophobic/hydrophilic properties of TiO 2-coated filters and the removal efficiencies. The removal rate could be increased by extending the warm up period of the lamps. When the face velocity was increased, the removal efficiency dropped in both filters. Similarly, high humidity adversely affected the removal efficiency, particularly with the coated high-grade air filter. © 2015, Taiwan Association for Aerosol Research.
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
License
N/A
Rights
N/A
Publication Source
Scopus