Removal and retention of viral aerosols by a novel alumina nanofiber filter

Li, Hsing-Wang; Wu, Chang‐Yu; Tepper, F.; Lee, Jinhwa; Lee, Christiana Nicole

doi:10.1016/j.jaerosci.2008.09.003

Cited by 60 publications

(35 citation statements)

References 24 publications

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“…In contrast, PC filters have a smooth surface that could be less damageable to viruses. Furthermore, other filter properties are known to affect the physical recovery of viral aerosols such as the filter's surface electrostatic charge (Li et al 2009) or whether the material is hydrophobic (PTFE) or hydrophilic (PC) (Reitz 2005). However, our qRT-PCR results show no significant differences between the two tested filters for the airborne viral recovery of the two tested bacteriophages suggesting that the overall particle collection efficiency is not significantly altered by the composition of the filter when using our experimental settings (RH, temperature, MMAD of particles and sampling time).…”

Section: Comparison Of Pc and Ptfe Filters For Airborne Viral Recoverymentioning

confidence: 99%

“…For these reasons, the coliphage MS2 (Golmohammadi et al 1993), a small non-enveloped bacterial virus (Leviviridae family) with a capsid diameter of 25 nm and a genome made of a single-stranded RNA (ssRNA) molecule (3569 nucleotides), has been used as an airborne viral model in many aerosol studies (Barker and Jones 2005;Burton et al 2007;Eninger et al 2009;Grinshpun et al 2007;Hogan et al 2005;Hogan et al 2006;Hogan et al 2004;Holton and Webb 1994;Kettleson et al 2009;Li et al 2009;Perrott et al 2009;Tseng and Li, 2005;Walker and Ko, 2007;Wang and Brion 2007). The Pseudomonas syringae virulent phage phi 6 is another well characterized bacterial virus that has some interesting features as a surrogate for RNA viruses, although it has been used only sporadically in aerosol studies (Ellis and Schlegel 1974).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Filters for the Sampling and Quantification of RNA Phage Aerosols

Gendron

Verreault

Veillette

et al. 2010

Aerosol Science and Technology

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This study exploits the virulent bacteriophages phi 6 (dsRNA) and MS2 (ssRNA) as surrogates for airborne RNA viruses. Two different filter types, polytetrafluoroethylene (PTFE) and polycarbonate (PC), were tested for their efficiency in collecting aerosolized RNA phages. Two commercial kits were tested for total RNA isolation. Also, heat shock treatments were performed in three different media to obtain the most favorable conditions for reverse transcription assays of dsRNA. Our findings suggest that PC filters are more suitable to recover infectious airborne RNA viruses as determined by plaque assays. Both types of filters were equally efficient in recovering RNA from aerosolized phage phi 6 as established by qRT-PCR. Viral samples should be treated with QIAamp Viral RNA Mini Kit and a 5 min heat shock treatment at 110• C in TE buffer before RT-PCR to maximize detection of phage phi 6. Overall, the infectivity of the recovered phages was severely affected by the aerosolization/air sampling process and the presence of RNA viruses in air samples should be determined by qRT-PCR.

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Section: Comparison Of Pc and Ptfe Filters For Airborne Viral Recoverymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Filters for the Sampling and Quantification of RNA Phage Aerosols

Gendron

Verreault

Veillette

et al. 2010

Aerosol Science and Technology

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“…At the most-penetrating particle size (MPPS), FE is mainly determined by three mechanisms : (1) interception, by which particles following an airstream flow line come within one radius of a fiber and adhere to it; (2) impaction, whereby larger particles fail to follow the curving contours of airstreams around the fiber and strike the fiber; and (3) diffusion, a result of the collision of small particles with gas molecules, which deflects their path through the filter. To improve filtration performance, electret and nanofiber (NF) media have also been introduced (Barrett and Rousseau 1998;Lehtimaki and Heinonen 1994;Li et al 2009;Wang 2001;Wang et al 2008;Yang and Lee 2005;Yun et al 2007). Electret filters utilize electrostatic attraction to improve aerosol collection, and NF filters lower the flow resistance through gas slip over the smaller-diameter fibers.…”

Section: Filtrationmentioning

confidence: 99%

Evaluation of the Performance of Iodine-Treated Biocidal Filters Under the Influence of Environmental Parameters

Woo¹,

Li²,

Wu³

2013

Self Cite

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“…Alumina nanoparticles and nanofiber show interesting properties such as ability to be formed into structures that enhance the functions of osteoblast for bone replacement [65,66], to form ultrathin alumina hollow fiber microfilm membrane [67] for separation processes, to form novel nanofilter for removal and retention of viral aerosols [68] and to serve as high performance turbidity filter [69]. The preparation of the final form of alumina fiber may involve the use of binders such as acid phosphate and silica colloid binder or polymers [70].…”

Section: Alumina Nanofiber Compositesmentioning

confidence: 99%

Synthesis of Alumina Nanofibers and Composites

Noordin¹,

Liew²

2010

Nanofibers

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IntroductionAlumina, Al 2 O 3 , is a ceramic metal oxide of great importance as building material, refractory material, electrical and heat insulator, attributed to its high strength, corrosion resistance, chemical stability, low thermal conductivity, and good electrical insulation. One phase of alumina, the -phase is widely used as catalyst, catalyst support and adsorbent because its high porosity and surface area. It is conventionally prepared by heating the hydrated trihydroxides, gibbsite and bayerite, to temperature of > 1000 o C to obtain the -alumina, corundum, a material with great hardness and low surface area. The trihydroxides, gibbsite, bayerite, both are Al(OH) 3. nH 2 O and the monohydroxyl oxide, boehmite, AlO(OH)·αH 2 O, have the monoclinic crystal structure with similar lattice parameters (a=0.866 nm, b=0.506 nm, c=0.983 nm, =94°34′ in boehmite, a=0.868 nm, b=0.507 nm, c=0.972 nm, =94°34′ in gibbsite, and a=0.867 nm, b=0.506 nm, c=0.942 nm, =90°26′ in bayerite [1,2]. In the process of heat treatment, the trihydroxide undergoes a series of transformations. It loses the water of hydration, then dehydroxalate at < 300 o C to form the monohydroxyl oxide boehmite, AlO(OH), which on further heating to increasingly higher temperatures, changes to the transition aluminas, including the -, -, -, and -phases, which then transform finally to the -form. These transition aluminas are crystalline solids with high porosity and surface areas as well as acidic and basic properties, which make them suitable as adsorbents, catalyst, catalyst support and fabricated into filtration membranes as well as used as fillers or components in polymer/ inorganic composite materials with enhanced mechanical properties. The conventional alumina as obtained are usually powder of particulates. These could be fabricated into alumina fibers by various method, through melt growth techniques including the internal crystallization method and extrusion, electrospraying [3] and electrospinning [4][5][6][7][8] have been developed for producing Al 2 O 3 fibers. The high surface areas of transition aluminas are due to the presence of pores. These pores are irregular in sizes and size distributions, and are mainly micropores of diameter less than 2 nm. Since the synthesis of mesoporous materials was first reported in the late 1980s , a number of methods for the synthesis of mesoporous alumina have been reported [8,9]. More recently, interest in nano-materials and nanotechnology has spurred a fury of investigations

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Removal and retention of viral aerosols by a novel alumina nanofiber filter

Abstract: Journal of Aerosol Science 40 (2009) 65-71. doi:10.1016/j.jaerosci.2008.09.003Received by publisher: 2008-03-22Harvest Date: 2016-01-04 12:19:58DOI: 10.1016/j.jaerosci.2008.09.003Page Range: 65-7

Cited by 60 publications

References 24 publications

Evaluation of Filters for the Sampling and Quantification of RNA Phage Aerosols

Evaluation of Filters for the Sampling and Quantification of RNA Phage Aerosols

Evaluation of the Performance of Iodine-Treated Biocidal Filters Under the Influence of Environmental Parameters

Synthesis of Alumina Nanofibers and Composites

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