Sampling efficiency of low-volume PM<sub>10</sub> inlets with different impaction substrates

Le, Thi-Cuc; Shukla, K.K.; Sung, Jung Che; Li, Ziyi; Yeh, Huajun; Huang, Wei; Tsai, Chuen-Tinn

doi:10.1080/02786826.2018.1559919

Cited by 20 publications

(9 citation statements)

References 29 publications

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“…An M-PM 10 impactor with oil-soaked GFF substrate supported by a porous metal disc as shown in Fig. 2 was designed to avoid the particle bounce and overloading effects (Le T.C. et al, 2019).…”

Section: Particle Loading Effectmentioning

confidence: 99%

“…Since 1970 until now, inertial impactors have been used extensively for various purposes such as (i) size-based classification for mass concentration measurement (Le T.C. and Tsai C.J., 2017;Le T.C. et al, 2019), (ii) particle mass distribution measurement (Marple V.A.…”

Section: Introductionmentioning

confidence: 99%

“…The sampling performance of the standard EPA louvered PM 10 inlet and PM 2.5 WINS inlet was studied and the particle bounce, re-entrainment, and particle overloading effects of these devices were found (Le T.C. and Tsai C.J., 2017;Le T.C. et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Tsai

2021

KONA

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Inertial impactors are applied widely to classify particulate matters (PMs) and nanoparticles (NPs) with desired aerodynamic diameters for further analyses due to their sharp cutoff characteristics, simple design, easy operation, and high collection ability. A few hundred papers have been published since the 1860s that addressed the characteristics and applications of the inertial impactors. In the last 30 years, our group has also carried out lots of studies to contribute to the design and the improvement of inertial impactors. With our understanding of inertial impactors, this article reviews previous studies of some typical types of the inertial impactors including conventional impactors, cascade impactors, and virtual impactors and the parameters for design consideration of these devices. The article also reviews some applications of the inertial impactors, which are mass concentration measurement, mass and number distribution measurement, personal exposure measurement, particulate matter control, and powder classification. The synthesized knowledge of the inertial impactor in this study can help researchers to design an inertial impactor with an accurate cutoff diameter, a sharp collection efficiency curve, and no particle bounce and particle overloading effects for long-term use for PM classification and control purposes.

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Section: Particle Loading Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Tsai

2021

KONA

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“…Two porous metal discs and three filter holders were removed for testing the penetration curve of the cyclone, and then the cyclone and the three filter holders were removed for testing the particle loss of the porous metal discs. Figure 2 shows the experimental setup of the cyclone penetration curve and the PDS particle loss tests with the method shown in the previous studies [53,54]. A vibrating orifice aerosol generator (VOAG, TSI Model 3450, USA) was used to generate monodisperse NaCl particles ranging from 1.20 to 5.05 µm and an aerodynamic particle sizer (APS, model 3321, TSI Incorporated, St. Paul, MN, USA) was used to measure the upstream and downstream particle concentrations.…”

Section: Five Liters Per Minute Pds Design and Laboratory Testmentioning

confidence: 99%

“…The PPWD-PILS-IC monitoring system was presented in detail in Li et al [31] and is described briefly below. A 16.7 L/min EPA PM 10 inlet [54] and a PM 2.5 VSCC inlet (very sharp cut cyclone) were used to remove particles larger than 2.5 µm in aerodynamic diameter. Sample air was drawn through the PPWD at 12.3 L/min to capture water-soluble precursor gases [36,37] first, before being introduced into the PILS to collected WSI ions [38].…”

Section: Field Comparison Testmentioning

confidence: 99%

Characterization of Atmospheric PM2.5 Inorganic Aerosols Using the Semi-Continuous PPWD-PILS-IC System and the ISORROPIA-II

Wang

Pui

et al. 2020

Atmosphere

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A semi-continuous monitoring system, a parallel plate wet denuder and particle into liquid sampler coupled with ion chromatography (PPWD-PILS-IC), was used to measure the hourly precursor gases and water-soluble inorganic ions in ambient particles smaller than 2.5 µm in diameter (PM2.5) for investigating the thermodynamic equilibrium of aerosols using the ISORROPIA-II thermodynamic equilibrium model. The 24-h average PPWD-PILS-IC data showed very good agreement with the daily data of the manual 5 L/min porous-metal denuder sampler with R2 ranging from 0.88 to 0.98 for inorganic ions (NH4+, Na+, K+, NO3−, SO42−, and Cl−) and 0.89 to 0.98 for precursor gases (NH3, HNO3, HONO, and SO2) and slopes ranging from 0.94 to 1.17 for ions and 0.87 to 0.95 for gases, respectively. In addition, the predicted ISORROPIA-II results were in good agreement with the hourly observed data of the PPWD-PILS-IC system for SO42− (R2 = 0.99 and slope = 1.0) and NH3 (R2 = 0.97 and slope = 1.02). The correlation of the predicted results and observed data was further improved for NH4+ and NO3− with the slope increasing from 0.90 to 0.96 and 0.95 to 1.09, respectively when the HNO2 and NO2− were included in the total nitrate concentration (TN = [NO3−] + [HNO3] + [HONO] + [NO2−]). The predicted HNO3 data were comparable to the sum of the observed [HNO3] and [HONO] indicating that HONO played an important role in the thermodynamic equilibrium of ambient PM2.5 aerosols but has not been considered in the ISORROPIA-II thermodynamic equilibrium model.

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Measuring Particle Concentration and Compositions in Indoor Air

Wallace¹,

Hopke²

2021

Handbook of Indoor Air Quality

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Sampling efficiency of low-volume PM₁₀ inlets with different impaction substrates

Cited by 20 publications

References 29 publications

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Characterization of Atmospheric PM2.5 Inorganic Aerosols Using the Semi-Continuous PPWD-PILS-IC System and the ISORROPIA-II

Measuring Particle Concentration and Compositions in Indoor Air

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Sampling efficiency of low-volume PM10 inlets with different impaction substrates

Cited by 20 publications

References 29 publications

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Characterization of Atmospheric PM2.5 Inorganic Aerosols Using the Semi-Continuous PPWD-PILS-IC System and the ISORROPIA-II

Measuring Particle Concentration and Compositions in Indoor Air

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Product

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Sampling efficiency of low-volume PM₁₀ inlets with different impaction substrates