Photocatalytic oxidation for antimicrobial control in built environment: A brief literature overview

Chen, Fengna; Yang, Xudong; Mak, Henry K.C.; Chan, Dwm

doi:10.1016/j.buildenv.2010.01.024

Cited by 98 publications

(41 citation statements)

References 59 publications

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“…Various techniques have been used to mitigate the viability of biological contaminants in indoor environments, such as ultraviolet (UV) irradiation (Lin and Li, 2002), air electric ion emission (Huang et al, 2008), ozone (Huang et al, 2012), and photocatalytic oxidation (Chen et al, 2010), among others. One promising method is an antimicrobial filtration system that physically captures bioaerosols on air filters and then inactivates the airborne microorganisms on the surface of the filters by treatment with antimicrobial materials such as silver or titanium-based nanoparticles (Li et al, 2006;Jin et al, 2007,), iodine powders (Lee et al, 2008), and carbon nanotubes (Brady-Estévez et al, 2008;Jung et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Han

Kang

Kim

et al. 2015

Aerosol Air Qual. Res.

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Antimicrobial air filters using a new natural product agent, grapefruit seed extract (GSE) have been investigated for application in air purifiers or heating, ventilation, and air-conditioning (HVAC) systems. The disk diffusion method was used to evaluate the antimicrobial activity of GSE, propolis, and shiitake against four bacteria: Staphylococcus aureus, Micrococcus luteus, Psedomonas aeruginosa, and Escherichia coli. The inactivation of S. aureus was then investigated on air filters treated with two natural products, GSE and propolis (selected for comparison to GSE) using two test methods based on different deposition weights.GSE displayed the highest antimicrobial activity against S. aureus, P. aeruginosa, and E. coli of the three natural products tested by the disk diffusion method. Similar inactivation rates of 58-67% for GSE and propolis air filters were observed at a relatively low deposition weight of 94-98 μg/cm 2 using the aerosol deposition method. However, the inactivation rate was considerably superior on the GSE air filter (~98%) compared to the propolis air filter (~75%) at deposition weights of 5000-8000 μg/cm 2 using the film attachment method. The inactivation rate for both GSE and propolis air filters could be expressed as an exponential function [in the form of 1 -exp(-ax b )] of the deposition weight per unit area of the natural product. The superior inactivation performance of the GSE air filter using the film attachment method was probably due to the high wettability of GSE for bacteria cultures, with a contact angle less than 20°. Therefore, GSE air filters will be more effective and economical than propolis air filters due to their high microbial activity and relatively low price.

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Section: Introductionmentioning

confidence: 99%

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Han

Kang

Kim

et al. 2015

Aerosol Air Qual. Res.

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“…Furthermore, from the point of the mechanism, the relationship between the yield of hydroxide radicals and the light intensity has been summarized by Chen et al [49] as follows:…”

Section: Reactorsmentioning

confidence: 99%

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Meng

Zhang

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

143

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“…Therefore, it is important and essential to develop technologies of purifying water in biological and biochemical industries. Amongst different approaches such as the use of chlorine dioxide, ozone, ultraviolet (UV) radiation and advanced filtration processes, photocatalytic oxidation disinfection has been shown to be an effective treatment for drinking water contaminated with bacterial, virus et al [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of E.coli membrane cell in the presence of ZnO nanowires

Wang

Liu

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The photocatalytic degradation of E.coli membrane cell by ZnO nanowires was studied using field-emission scanning electron microscope(FE-SEM), fluorescence microscopy, and Attenuated total reflection fourier transform infrared(ATR-FTIR). The outer membrane of E.coli was removed completely in the presence of ZnO nanowires under UV irradiation, and the cells became twisted shapes without a mechanically strong network. After ZnO nanowires photocatalysis, the permeability of the treated cells increased to some degree that could be confirmed by quantum dots labeling technique. Structural changes in the cell wall membrane were revealed by the decay of the characteristic groups bands in ATR-FTIR spectra.

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Photocatalytic oxidation for antimicrobial control in built environment: A brief literature overview

Cited by 98 publications

References 59 publications

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Investigation of Antimicrobial Activity of Grapefruit Seed Extract and Its Application to Air Filters with Comparison to Propolis and Shiitake

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Photocatalytic degradation of E.coli membrane cell in the presence of ZnO nanowires

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