airborne microorganism disinfection by photocatalytic hepa filter

Clicks: 178
ID: 177416
2010
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Ranked #16 of 23 articles by views in the aging male : the official journal of the international society for the study of the aging male

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Abstract
This study determined the efficacy of photocatalytic HEPA filters on microorganism disinfection in a closed-loop chamber and later applied it in an air purifier and tested its efficacy in an 8-m3 chamber and in a hospital. The photocatalytic filters were made by dip-coating a HEPA filter in a TiO2 slurry. In order to disinfect the microorganisms retained on the filter, UV-A light was irradiated onto the filter to create strong oxidative radicals which can destroy microorganisms. The findings showed that disinfection efficiency of the photocatalytic filters with high TiO2 loading was insignificantly higher than with lower loading. S. epidermidis was completely eliminated within 2 hours, while 86.8% of B. subtilis, 77.1% of A. niger, and 82.7% of P. citrinum were destroyed within 10 hours. When applying the photocatalytic filters into an air purifier in a 8-m3 chamber, it was found that as soon as the air purifier was turned on, 83.4% of S. epidermidis, 81.4% of B. subtilis, 88.5% of A. niger, and 75.8% of P. citrinum were removed from the air. In a hospital environment, the PCO air purifier efficacy was lower than that in the chamber. Besides, relative humidity, distances from the air purifier and room size were suspected to affect the efficacy of the photocatalytic filters.
Reference Key
chotigawin2010environmentasiaairborne Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Rotruedee Chotigawin;Paradee Chuaybamroong
Journal the aging male : the official journal of the international society for the study of the aging male
Year 2010
DOI
DOI not found
URL
http://www.tshe.org/ea/pdf/vol3%20no2%20p1-7.pdf
Keywords
anthropology recreationenvironmental sciences

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