Characterization of particulate matter from diesel passenger cars tested on chassis dynamometers

Jung, Sungwoon; Lim, Jae-Hyun; Kwon, Sangil; Jeon, Sangwoo; Kim, Jeongsoo; Kim, Sunmoon

doi:10.1016/j.jes.2016.01.035

Cited by 26 publications

(17 citation statements)

References 45 publications

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“…Global air pollution has become a major threat to human health. This worldwide problem is especially relevant to the release of fine particulate matter (PM 2.5 ), which has the aerodynamic diameter less than 2.5 µm and originates from incomplete coal combustion and diesel vehicle exhaust in Korea (Lee et al 2005 ; Jung et al 2017 ). In recent years, the relationship between PM 2.5 production and public health hazards has attracted an increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis

et al. 2018

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The skin is the largest organ of the human body and the one mostly exposed to outdoor contaminants. To evaluate the biological mechanisms underlying skin damage caused by fine particulate matter (PM2.5), we analyzed the effects of PM2.5 on cultured human keratinocytes and the skin of experimental animals. PM2.5 was applied to human HaCaT keratinocytes at 50 µg/mL for 24 h and to mouse skin at 100 µg/mL for 7 days. The results indicate that PM2.5 induced oxidative stress by generating reactive oxygen species both in vitro and in vivo, which led to DNA damage, lipid peroxidation, and protein carbonylation. As a result, PM2.5 induced endoplasmic reticulum stress, mitochondrial swelling, and autophagy, and caused apoptosis in HaCaT cells and mouse skin tissue. The PM2.5-induced cell damage was attenuated by antioxidant N-acetyl cysteine, confirming that PM2.5 cellular toxicity was due to oxidative stress. These findings contribute to understanding of the pathophysiological mechanisms triggered in the skin by PM2.5, among which oxidative stress may play a major role.

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Section: Introductionmentioning

confidence: 99%

Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis

et al. 2018

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“…The HAPs are classified into gaseous and particulate matter. Mobile source emissions are main sources for gaseous and particulate matter in urban air pollution (Jung et al, 2017). Gaseous matter is comprised of aromatic hydrocarbons, such as benzene and toluene, as well as the derivatives, such as VOCs and aldehydes, with a distinctive odor.…”

Section: Introductionmentioning

confidence: 99%

Emission Characteristics of Hazardous Air Pollutants from Construction Equipment

Jung

Kim

Lim

et al. 2020

Aerosol Air Qual. Res.

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The emission characteristics of mobile air pollution sources belonging to the non-road sector have yet to be thoroughly investigated, especially when compared to those of on-road vehicles. Hence, the present study employed an engine dynamometer to evaluate the emissions of a diesel engine complying with Tier 3 standards during various driving modes (KC1-8, NRSC, and NRTC) and a portable emissions measurement system (PEMS) to assess those of two excavators, one complying with Tier 3 and the other with Tier 4 standards, during real-world working and driving conditions. The characteristics and chemical composition of the emitted regulated pollutants (carbon monoxide (CO), non-methane hydrocarbon (NMHC), nitrogen oxide (NO x), and particulate matter (PM)) and hazardous air pollutants (HAPs), e.g., volatile organic compounds (VOCs), aldehydes, and polycyclic aromatic hydrocarbons (PAHs), were then determined. For the regulated pollutants, NRTC mode generated the highest emissions owing to the rapid changes in engine load and speed during transitions. As a result of the after-treatment systems, which utilized a diesel oxidation catalyst (DOC) and selective catalytic reduction (SCR), CO, NMHC, and NO x emissions from the Tier 4-compliant excavator were lower than those from the Tier 3compliant diesel engine and excavator. The operating conditions of the diesel engine and construction equipment as well as the after-treatment systems significantly affected the composition of the non-methane volatile organic compound (NMVOC) emissions, which were dominated by alkanes that comprised 23 detected species. Sampling the particle-phase PAHs, we found phenanthrene, fluoranthene, and naphthalene; furthermore, we estimated the concentrations of the gas-phase PAHs with models to obtain the total PAH concentrations. Formaldehyde, which contributed the largest fraction of the aldehydes, was more abundant than the other species. Thus, emissions from non-road sources, including construction equipment, must be controlled because of the considerable health risks from pollutants such as formaldehyde and benzene. Our results will aid in the establishment of a national emission inventory for HAPs.

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“…However, they emit a huge amount of particulates and nitrogen oxide (NOx), which not only pollute the atmospheric environment but also endanger human health. Thus, emission regulations are continuously being introduced to limit the particulate and NOx emissions from diesel engines (Shen et al, 2015;Jung et al, 2017). To meet the increasing emission regulations, exhaust after-treatment equipment is necessary for diesel engines (Guardiola et al, 2017;Fleischman et al, 2018), among which the diesel oxidation catalyst (DOC) and catalyzed diesel particulate filter (CDPF) are indispensable in emission control (He et al, 2015;Zhang et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

Emission reduction characteristics of a catalyzed continuously regenerating trap after-treatment system and its durability performance

Zhang

Lou

Tan

et al. 2019

Journal of Environmental Sciences

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Characterization of particulate matter from diesel passenger cars tested on chassis dynamometers

Cited by 26 publications

References 45 publications

Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis

Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis

Emission Characteristics of Hazardous Air Pollutants from Construction Equipment

Emission reduction characteristics of a catalyzed continuously regenerating trap after-treatment system and its durability performance

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