Deposition of diesel exhaust particles from various fuels in a cast of human respiratory system under two breathing patterns

Penconek, Agata; Moskal, Arkadiusz

doi:10.1016/j.jaerosci.2013.04.008

Cited by 13 publications

(7 citation statements)

References 41 publications

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“…ey found that the dominating deposition mechanism of particles below 500 nm was diffusion, and the diffusivity was independent of the particle effective density and a function of mobility diameter. Penconek and Moskal experimentally studied the nanosized-aggregate DEP depositions in a cast of the human respiratory system under two breathing patterns for three typical kinds of diesel fuels [38].…”

Section: Aerosol Deposition Through Bifurcation Bendsmentioning

confidence: 99%

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Zhou

Sun

Jiang

et al. 2018

Journal of Nanotechnology

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This paper presented experimental views of nano- and microaerosol distribution and deposition in turbulent tran-bend flows. These views included the particle flow measurement and particle depositions through individual bends, bifurcation bends, and those behind bends. Selected experiments were summarized and compared according to the gas flow, the bend geometry, and the particle flow properties. Based on recent studies, the influencing factors of environmental humidity, particle and surface properties, nanoparticle formation, coagulation, or evolution phenomena were discussed, and then research suggestions were given for future research and applications. It is specially mentioned that the new particle formation and nanoparticle growth affect its deposition under environmental contaminant conditions; nanoscale particle dynamics and transport have a growing trend on attracting the research and industry attentions.

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Section: Aerosol Deposition Through Bifurcation Bendsmentioning

confidence: 99%

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Zhou

Sun

Jiang

et al. 2018

Journal of Nanotechnology

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“…The most recent Urban Air Toxics Study results posted on the EPA web site include FA, acetaldehyde (AA), and acrolein (ACR) as significant contributors to the summed risk values for mobile sources of air toxins. Diesel exhaust particles as well as the gas-phase of diesel exhaust fumes are believed to play a key role in carcinogenic effect on human health [15]. The International Agency for Research on Cancer classified diesel exhaust as carcinogens to humans.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Air-Dispersed Formaldehyde and Carbonyl Compounds as Vapors and Adsorbed on Particulate Matter by Denuder-Filter Sampling and Gas Chromatographic Analysis

Dugheri

Mucci

Cappelli

et al. 2019

IJERPH

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Carbonyl compounds (CCs) are products present both as vapors and as condensed species adsorbed on the carbonaceous particle matter dispersed in the air of urban areas, due to vehicular traffic and human activities. Chronic exposure to CCs is a potential health risk given the toxicity of these chemicals. The present study reports on the measurement of the concentrations of 14 CCs in air as vapors and 2.5 µm fraction PM by the ENVINT GAS08/16 gas/aerosol sampler, a serial sampler that uses annular denuder, as sampling device. The 14 CCs were derivatized during sampling prior to gas-chromatographic separation and multiple detection by mass spectrometry, nitrogen-phosphorus thermionic, electron capture detection. Outdoor air multiple samples were collected in four locations in the urban area of Florence. The results evidenced that formaldehyde, acetaldehyde, and acetone were the more abundant CCs in the studied areas. The data collected was discussed considering the particle to vapor ratio of each CC found. The CCs pollution picture obtained was tentatively related to the nature and intensity of the traffic transiting by the sampling sites. This approach allowed to determine 14 CCs in both concentrated and diluted samples and is proposed as a tool for investigating outdoor and indoor pollution.

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“…Also, the deposition of diesel PMs in the depths of the human respiratory system can cause a variety of health problems. 6,7 Although some technical measures (increased injection pressure, ultrahigh exhaust gas recirculation (EGR) rate, improved pistonbowl geometries, improved in-cylinder flows, etc.) have been employed and substantial reductions in soot emissions by mass can be achieved, yet ultrafine diesel soot particles remain a problem to be resolved.…”

Section: Introductionmentioning

confidence: 99%

“…However, the main challenge for conventional diesel engines is high nitrogen oxide and particulate matter (PM) emissions. , Recent studies − have shown there exists a special relationship between PM and carcinogenic and mutagenic effects due to the existence of PAHs (polycyclic aromatic hydrocarbons). Also, the deposition of diesel PMs in the depths of the human respiratory system can cause a variety of health problems. , Although some technical measures (increased injection pressure, ultrahigh exhaust gas recirculation (EGR) rate, improved piston-bowl geometries, improved in-cylinder flows, etc.) have been employed and substantial reductions in soot emissions by mass can be achieved, yet ultrafine diesel soot particles remain a problem to be resolved.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Morphology and Nanostructure of the Soot Particles Produced within Transient Diesel Reacting Jet Flame by Using Thermophoretic Sampling Technique

Wang

Liu

et al. 2019

Energy Fuels

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In this work, thermophoretic sampling experiments are carried out in a constant volume combustion chamber (CVCC) accompanied by the subsequent high-resolution transmission electron microscopy (HRTEM) imaging to investigate the morphology, nanostructure, and size of soot particles directly sampled within the reacting diesel jet spray flame under ambient conditions close to practical engine combustion. The experiments are performed with different fuel injection masses to examine the variation of the morphological and nanostructural parameters of soot primary particles and aggregates with the fuel injection quantity, Q s . The results show the particles sampled in the cases with low fuel injection quantity (Q s ) have a fraction of separately existing small primary particles and small aggregates made up of only several primary particles. As the fuel injection mass is further increased, the number of soot particles increase but the projection area becomes smaller. The fractal dimension of the sampled aggregates is found to increase from 1.66 to 1.86 with the fuel injection mass. The particles sampled under different Q s cases have similar sphericity (Φ) and circularity (C) values. Especially, no abrupt changes appear in the C and Φ values as the particle size increases. The correlation between C and Φ values reveals the small-size soot particles are more likely to show an ellipse shape, while the larger ones are more likely to exhibit irregular shapes, neither spherical nor chain-like. The normalized histograms of the diameter of primary particles exhibit a normal distribution pattern for all the fuel injection quantities tested. Larger primary particles and soot agglomerates are associated with the higher fuel injection quantiy. The HRTEM analysis indicates the fringe tortuosity and separation distance decrease as the fuel injection quantity increases, while the fringe length increases with increasing fuel injection quantity.

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Deposition of diesel exhaust particles from various fuels in a cast of human respiratory system under two breathing patterns

Cited by 13 publications

References 41 publications

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Experimental Views of Tran-Bend Particle Deposition in Turbulent Flow with Nanoscale Effect

Monitoring of Air-Dispersed Formaldehyde and Carbonyl Compounds as Vapors and Adsorbed on Particulate Matter by Denuder-Filter Sampling and Gas Chromatographic Analysis

Characterization of the Morphology and Nanostructure of the Soot Particles Produced within Transient Diesel Reacting Jet Flame by Using Thermophoretic Sampling Technique

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