Characterization and evaluate the efficiency of different filter media in removing nanoparticles

Bortolassi, Ana Cláudia Canalli; Guerra, Vádila Giovana; Aguiar, Mônica Lopes

doi:10.1016/j.seppur.2016.11.010

Cited by 52 publications

(36 citation statements)

References 7 publications

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“…Filter media permeability experiments were performed varying the flow rate from 100 to 1000 mL/min and the pressure drop was measured using a digital manometer (VelociCalc Model 3A-181WP09, TSI) connected to filtration apparatus as shown in Figure 1, and as described in reference [51].…”

Section: Structural and Morphological Properties Of Nanofiber Filtersmentioning

confidence: 99%

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Bortolassi

Nagarajan

Lima

et al. 2019

Materials Science and Engineering: C

161

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Human exposure to air pollution and especially to nanoparticles is increasing due to the combustion of carbon-based energy vectors. Fibrous filters are among the various types of equipment potentially able to remove particles from the air. Nanofibers are highly effective in this area; however, their utilization is still a challenge due to the lack of studies taking into account both nanoparticle collection efficiency and antibacterial effect. The aim of this work is to produce and evaluate novel silver/polyacrylonitrile (Ag/PAN) electrospun fibers deposited on a nonwoven substrate to be used as air filters to remove nanoparticles from the air and also showing antibacterial activity. In order to determine the optimum manufacturing conditions, the effects of several electrospinning process parameters were analyzed such as solution concentration, collector to needle distance, flow rate, voltage, and duration. Ag/PAN nanofibers were characterized by Xray diffraction (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red spectroscopy (FTIR), Energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). In addition, filtration performances were determined by measuring the pressure drop and collection efficiency of sodium chloride (NaCl) aerosol particles (9 to 300 nm diameters) using Scanning Mobility Particle Sizers (SMPS). Filters with high filtration efficiency (≈100%) and high-quality factor (≈0.05 Pa -1 ) were obtained even adding different concentrations of Ag nanoparticles (AgNPs) to PAN nanofibers. The resultant Ag/PAN nanofibers showed excellent antibacterial activity against 10 4 CFU/ml E.coli bacteria.The crystallinity of the silver nanoparticles was analyzed using X-ray diffraction analysis and shown in Figure S1. The peak observed at 17° for the 0AgF samples corresponds to (110) plan of PAN. Crystalline peak corresponds to silver nanoparticles were absent in all samples (1AgF, 10AgF, and 50AgF) which is due to the small size (<5nm) of silver nanoparticles.

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Section: Structural and Morphological Properties Of Nanofiber Filtersmentioning

confidence: 99%

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Bortolassi

Nagarajan

Lima

et al. 2019

Materials Science and Engineering: C

161

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“…Firstly, filter characterization was evaluated such as thickness, grammage, fiber diameter using scanning electron microscopy (SEM) images. It was analyzed the images to obtain the fiber diameter of the filters using Image Pro-Plus v. 7 Program and the same procedure as in Bortolassi et al [24]. Then, nanoparticles in the size range between 7.4 and 300 nm were generated using particles generator and an aqueous slurry of 0.1 g/L nickel oxide.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Different Hepa Filter Media for Removing Nickel Oxide Nanoparticles From Air Filtration

Bortolassi¹,

Guerra²,

Aguiar³

2019

TMM

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Currently, scientific research in the field of nanotechnology has attracted growing interest because of its several applications. The metal oxides have high added value in industrial processes and in addition, human exposure to these nanoparticles can cause respiratory problems. Filtration using fibrous filters is among the various options that can be used to provide efficient elimination of nanoparticles. While it is known that fibrous filters can successfully remove microparticles present in the air, there has been little research concerning the removal of nanoparticles using nickel oxide nanoparticles. The aim of this study was to evaluate the efficiency of three HEPA (High-Efficiency Particulate Air) filter media with glass and micro-quartz fiber for the removal of nickel oxide nanoparticles. Two HEPA filter with glass fibers (H1 and H2) and one HEPA filter with micro-quartz fibers (H3). Nanoparticles were generated using an atomizer generator through a 0.1 g/L nickel oxide water suspension. The efficiency of filter media was measured using an electrical mobility particle analyzer (SMPS) coupled to the filtration line and particles were counted before and after the filter media in the size range between 7.4 and 289 nm. Both filter media had efficiency collection above 99% but H1 filter stand out among the others.

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“…The experimental unit included an air compressor (Shultz, Acworth, GA, USA), air purification filters (Model A917A-8104N-000 and 0A0-000), an atomizer aerosol generator (Model 3079, TSI, Shoreview, MN, USA), a diffusion dryer (Norgren IMI, Birmingham, UK), a Kriptônio and Americium neutralizing source (Model 3054, TSI, Shoreview, MN, USA), a filter apparatus, a flowmeter tube size 3 (Gilmont, Vernon Hills, IL, USA), and a scanning mobility particle sizer that comprises an electrostatic classifier (Model 3080, TSI, Shoreview, MN, USA), a differential mobility analyzer, and an ultrafine particle counter (Model 3776, TSI, Shoreview, MN, USA), as described by Bortolassi et al [46].…”

Section: Testing the Nanofiber Filter's Filtration Performancementioning

confidence: 99%

“…The nanofiber diameter distribution was analyzed by scanning electron microscopy (SEM) with a Hitachi S4800 microscope (Tokyo, Japan), and thickness was measured with a caliper (Starrett, Athol, MA, USA). The fiber diameter was measured from SEM images using Image J1.29X as described by Bortolassi et al [46]. The fiber size distribution was determined by measuring 100 fibers of each filter medium.…”

Section: Introductionmentioning

confidence: 99%

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Composites Based on Nanoparticle and Pan Electrospun Nanofiber Membranes for Air Filtration and Bacterial Removal

et al. 2019

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Often, solid matter is separated from particle-laden flow streams using electrospun filters due to their high specific surface area, good ability to capture aerial particulate matter, and low material costs. Moreover, electrospinning allows incorporating nanoparticles to improve the filter’s air filtration efficiency and bacterial removal. Therefore, a new, improved polyacrylonitrile (PAN) nanofibers membrane that could be used to remove air pollutants and also with antibacterial activity was developed. We engineered three different filters that are characterized by the different particles embedded in the PAN nanofibers: titanium dioxide (TiO2), zinc oxide (ZnO), and silver (Ag). Then, their filtration performance was assessed by quantifying the filtration of sodium chloride (NaCl) aerosol particles of 9 to 300 nm in diameter using a scanning mobility particle sizer. The TiO2_F filter displayed the smallest fiber diameter and the highest filtration efficiency (≈100%). Conversely, the Ag_F filter showed the highest quality factor (≈0.06 Pa−1) because of the lower air pressure drop. The resulting Ag_F nanofibers displayed a very good antibacterial activity using an Escherichia coli suspension (108 CFU/mL). Moreover, the quality factor of these membranes was higher than that of the commercially available nanofiber membrane for air filtration.

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Characterization and evaluate the efficiency of different filter media in removing nanoparticles

Cited by 52 publications

References 7 publications

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Evaluation of Different Hepa Filter Media for Removing Nickel Oxide Nanoparticles From Air Filtration

Composites Based on Nanoparticle and Pan Electrospun Nanofiber Membranes for Air Filtration and Bacterial Removal

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