Size distributions and size-segregated chemical profiles of particulate matter in a traffic tunnel of East-Central China

Dong, Zhe; Jiang, Nan; Duan, Shiguang; Zhang, Li; Li, Shengli; Zhang, Ruiqin

doi:10.1016/j.apr.2019.08.001

Cited by 12 publications

(3 citation statements)

References 51 publications

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“…The MPPD model is capable of estimating the deposition fraction of PM in human airways and has been widely applied to assess risks to human health. ,, The stochastic module was chosen to estimate deposition patterns as utilized previously. , To run this model, input parameters include: (1) PM characteristics (diameter, shape, and density); (2) breathing parameters (tidal volume (TV, mL), and breathing frequency (BF, min –1 )); (3) lung parameters (functional residual capacity (FRC) volume (mL), upper respiratory tract (URT) volume (mL)); and (4) exposure conditions (body orientation, inspiratory fraction, and breathing scenario). Based on the size distribution of Chinese cities summarized previously, − the median mass-adjusted diameters of PM 1 , PM 1–2.5 , and PM 2.5–10 were estimated to be 577, 1885, and 6181 nm, respectively. The density setting was 1.5 g/cm 3 for PM 1 , 2 g/cm 3 for PM 1–2.5 , and 1.7 g/cm 3 for PM 2.5–10 , respectively .…”

Section: Methodsmentioning

confidence: 99%

Mortality Risk Associated with Short-Term Exposure to Particulate Matter in China: Estimating Error and Implication

Wang

Yin

Fan

et al. 2020

Environ. Sci. Technol.

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Most previous studies used a specific size of particulate matter (PM x ) for dosimetry estimation when determining particulate matter (PM)-associated risk, which precluded the impact of other sizes of PM. Here, we used a multiple-path particle dosimetry model to determine the deposition of PM in human airways and further estimated the associated mortality risk in 205 cities in China. Results showed that the fractions of PM 1 , PM 1−2.5 , and coarse PM (PM 2.5−10 ) deposited in the tracheobronchial (TB) and pulmonary airways were estimated in ranges of 11.06−12.83, 19.9−26.37, and 5.35−9.81%, respectively. Each 10 μg/ m 3 increase in deposited PM was significantly associated with a nationwide increment of 1.12% (95% confidence interval, CI, 0.77− 1.49%) for total nonaccidental mortality. Short-term exposure to PM during 2014−2017 resulted in a nationwide mortality of 98 826 cases/ year, with contributions from PM 1 , PM 1−2.5 , coarse PM of 37.7, 43.1, and 19.2%, respectively. Our study demonstrated that the estimated mortality counts may be associated with the coefficient of variation of dosimetry estimations. In addition, we revealed the caution should be exercised when interpreting PM x -associated risk and further reinforced the importance of size distribution in relevant research.

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Section: Methodsmentioning

confidence: 99%

Mortality Risk Associated with Short-Term Exposure to Particulate Matter in China: Estimating Error and Implication

Wang

Yin

Fan

et al. 2020

Environ. Sci. Technol.

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show abstract

“…[1][2][3] The primary PM from motor vehicles and its secondary PM are major contributors for PM 2.5 . 4 Before suitable measures are taken to reduce PM emissions, it is essential to make a clear identification of transportation PM from the atmosphere. However, once transportation PM were ejected into the atmosphere, a great variety of changes including physical adsorption and chemical reactions took place, which makes the particulate size and components more complicated.…”

Section: Introductionmentioning

confidence: 99%

“…It potentially brings about severe diseases of human, including cardiovascular, chronic cardiopulmonary morbidity and etc 1‐3 . The primary PM from motor vehicles and its secondary PM are major contributors for PM 2.5 4 . Before suitable measures are taken to reduce PM emissions, it is essential to make a clear identification of transportation PM from the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the size distribution and carbon components of particulate matters from typical sources

Zuo

Mei

Yang

et al. 2020

Env Prog and Sustain Energy

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A comparative study on the size distribution and carbon component of particulate matter (PM) from four typical sources in Zhenjiang, China were carried out. Two raw PM cases were collected directly from the diesel/gasoline engine, individually, while another two diluted PM cases were gleaned from the atmosphere on particular venues concerning the contribution of diesel/gasoline PMs, respectively. It was revealed that the raw diesel/gasoline PMs presented mass concentration peaks at the size range of 0.18-0.32 μm, while most of the diluted PM from the atmosphere near the chimney vent of the engine laboratory and in the basement garage concentrated at the size range of 0.32-0.56 and 1.0-1.8 μm, respectively. Via the carbon component analysis, for the raw diesel PM, the major parts of OC fractions were determined as OC1, OC2 and OC3, meanwhile EC2 took the majority of EC. As for the diluted PM from the atmosphere, OC2, OC3 and OC4, and EC1 and EC2 accounted for the main parts of OC and EC, respectively. The rate of OC to EC (OC/EC) of the PMs from the diesel engine, near the laboratory chimney vent and in the basement garage varied in a range of 0.92-2.50, 1.40-2.53, and 2.36-4.82, respectively. It is worth noting that the OC/EC of the PM collected in the basement garage exceeded 2.0, which implies that a great deal of secondary particulates were generated. Overall, this article may assist to understand the possible evolution path of PM from the raw source to the diluted status.

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Characteristics, source analysis, and health risk of PM2.5 in the urban tunnel environment associated with E10 petrol usage

Jiang,

Lv,

Zhang

et al. 2024

Environ Sci Pollut Res

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Size distributions and size-segregated chemical profiles of particulate matter in a traffic tunnel of East-Central China

Cited by 12 publications

References 51 publications

Mortality Risk Associated with Short-Term Exposure to Particulate Matter in China: Estimating Error and Implication

Mortality Risk Associated with Short-Term Exposure to Particulate Matter in China: Estimating Error and Implication

A comparative study on the size distribution and carbon components of particulate matters from typical sources

Characteristics, source analysis, and health risk of PM2.5 in the urban tunnel environment associated with E10 petrol usage

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