Commuters’ exposure to PM2.5 and CO2 in metro carriages of Shanghai metro system

Bin Xu; Xiao Yu; Hao Gu; Bo Miao; Mengdi Wang; Haiqi Huang

doi:10.1016/j.trd.2016.05.001

Commuters’ exposure to PM_2.5 and CO₂ in metro carriages of Shanghai metro system

Bin Xu, Xiao Yu, Hao Gu, Bo Miao, Mengdi Wang, Haiqi Huang

Division of Business, Engineering, and Information Sciences & Technology (Altoona)

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Air quality inside transportation carriages has become a public concern. A comprehensive measurement campaign was conducted to examine the commuters’ exposure to PM_2.5 (d_p ⩽ 2.5 μm) and CO₂ in Shanghai metro system under different conditions. The PM_2.5 and CO₂ concentrations inside all the measured metro lines were observed at 84 ± 42 μg/m³ and 1253.1 ± 449.1 ppm, respectively. The factors that determine the in-carriage PM_2.5 and CO₂ concentrations were quantitatively investigated. The metro in-carriage PM_2.5 concentrations were significantly affected by the ventilation systems, out-carriage PM_2.5 concentrations and the passenger numbers. The largest in-carriage PM_2.5 and CO₂ concentrations were observed at 132 μg/m³ and 1855.0 ppm inside the carriages equipped with the oldest ventilation systems. The average PM_2.5 and CO₂ concentrations increased by 24.14% and 9.93% as the metro was driven from underground to overground. The average in-carriage PM_2.5 concentrations increased by 17.19% and CO₂ concentration decreased by 16.97% as the metro was driven from urban to the suburban area. It was found that PM_2.5 concentration is proportional to the on-board passenger number at a ratio of 0.4 μg/m³·passenger. A mass-balance model was developed to estimate the in-carriage PM_2.5 concentration under different driving conditions.

Original language	English (US)
Pages (from-to)	162-170
Number of pages	9
Journal	Transportation Research Part D: Transport and Environment
Volume	47
DOIs	https://doi.org/10.1016/j.trd.2016.05.001
State	Published - Aug 2016

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Transportation
General Environmental Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.trd.2016.05.001

Cite this

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title = "Commuters{\textquoteright} exposure to PM2.5 and CO2 in metro carriages of Shanghai metro system",

abstract = "Air quality inside transportation carriages has become a public concern. A comprehensive measurement campaign was conducted to examine the commuters{\textquoteright} exposure to PM2.5 (dp ⩽ 2.5 μm) and CO2 in Shanghai metro system under different conditions. The PM2.5 and CO2 concentrations inside all the measured metro lines were observed at 84 ± 42 μg/m3 and 1253.1 ± 449.1 ppm, respectively. The factors that determine the in-carriage PM2.5 and CO2 concentrations were quantitatively investigated. The metro in-carriage PM2.5 concentrations were significantly affected by the ventilation systems, out-carriage PM2.5 concentrations and the passenger numbers. The largest in-carriage PM2.5 and CO2 concentrations were observed at 132 μg/m3 and 1855.0 ppm inside the carriages equipped with the oldest ventilation systems. The average PM2.5 and CO2 concentrations increased by 24.14% and 9.93% as the metro was driven from underground to overground. The average in-carriage PM2.5 concentrations increased by 17.19% and CO2 concentration decreased by 16.97% as the metro was driven from urban to the suburban area. It was found that PM2.5 concentration is proportional to the on-board passenger number at a ratio of 0.4 μg/m3·passenger. A mass-balance model was developed to estimate the in-carriage PM2.5 concentration under different driving conditions.",

author = "Bin Xu and Xiao Yu and Hao Gu and Bo Miao and Mengdi Wang and Haiqi Huang",

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T1 - Commuters’ exposure to PM2.5 and CO2 in metro carriages of Shanghai metro system

AU - Xu, Bin

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AU - Miao, Bo

AU - Wang, Mengdi

AU - Huang, Haiqi

PY - 2016/8

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AB - Air quality inside transportation carriages has become a public concern. A comprehensive measurement campaign was conducted to examine the commuters’ exposure to PM2.5 (dp ⩽ 2.5 μm) and CO2 in Shanghai metro system under different conditions. The PM2.5 and CO2 concentrations inside all the measured metro lines were observed at 84 ± 42 μg/m3 and 1253.1 ± 449.1 ppm, respectively. The factors that determine the in-carriage PM2.5 and CO2 concentrations were quantitatively investigated. The metro in-carriage PM2.5 concentrations were significantly affected by the ventilation systems, out-carriage PM2.5 concentrations and the passenger numbers. The largest in-carriage PM2.5 and CO2 concentrations were observed at 132 μg/m3 and 1855.0 ppm inside the carriages equipped with the oldest ventilation systems. The average PM2.5 and CO2 concentrations increased by 24.14% and 9.93% as the metro was driven from underground to overground. The average in-carriage PM2.5 concentrations increased by 17.19% and CO2 concentration decreased by 16.97% as the metro was driven from urban to the suburban area. It was found that PM2.5 concentration is proportional to the on-board passenger number at a ratio of 0.4 μg/m3·passenger. A mass-balance model was developed to estimate the in-carriage PM2.5 concentration under different driving conditions.

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