Issue 5, 2017

An investigation of the PM2.5 and NO2 concentrations and their human health impacts in the metro subway system of Suzhou, China

Abstract

This study measured the particle concentrations with an aerodynamic diameter smaller than 2.5 μm (PM2.5), nitrogen dioxide (NO2), and relative humidity (RH) at five metro subway stations in Suzhou's subway system (Lines 1 and 2). The real-time monitoring campaign was conducted from March 30th to April 10th and August 4th to August 21st, 2015. The monitoring practice was carried out during rush (7:00–9:00 AM and 17:00–19:00 PM) and regular hours (other times) at the ground and underground levels under different weather conditions with a purpose of obtaining representative data. The monitored results show that the concentrations of PM2.5 in the train carriages were lower than the concentrations at the underground platforms during both spring and summer. The mean PM2.5 concentrations at all the underground platforms in all the sub-stations monitored were significantly higher than those at the ground level. The human health impact was calculated to be 6300 annual DALYs (or 375 deaths) due to exposure to the subway system in Suzhou according to the UNEP-SETAC toxicity (USEtox) model. Linear regression models were applied to evaluate the relationships between the PM2.5, NO2 concentrations, and RH. We found that a 10% increment in RH from the current average level of 50–60% can lead to a 9.8 μg m−3 concentration decrease in PM2.5. This further results in the total human health impact being reduced to 2451 DALYs (150–4753 DALYs), representing a 20% decrease (1.2–38%).

Graphical abstract: An investigation of the PM2.5 and NO2 concentrations and their human health impacts in the metro subway system of Suzhou, China

Article information

Article type
Paper
Submitted
06 ዲሴም 2016
Accepted
01 ማርች 2017
First published
07 ማርች 2017

Environ. Sci.: Processes Impacts, 2017,19, 666-675

An investigation of the PM2.5 and NO2 concentrations and their human health impacts in the metro subway system of Suzhou, China

S. Cao, X. Kong, L. Li, W. Zhang, Z. Ye and Y. Deng, Environ. Sci.: Processes Impacts, 2017, 19, 666 DOI: 10.1039/C6EM00655H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements