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Spatial distributions and chemical properties of PM2.5 based on 21 field campaigns at 17 sites in China

Zheng, J, Hu, M, Peng, J, Wu, Z, Kumar, P, Li, M, Wang, Y and Guo, S (2016) Spatial distributions and chemical properties of PM2.5 based on 21 field campaigns at 17 sites in China Chemosphere, 159 (Sept). pp. 480-487.

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Abstract

Severe air pollution and its associated health impacts have become one of the major concerns in China. A detailed analysis of PM2.5 chemical compositions is critical for optimizing pollution control measures. In this study, daily 24-h bulk filter samples were collected and analyzed for totally 21 field campaigns at 17 sites in China between 2008 and 2013. The 17 sites were classified into four groups including six urban sites, seven regional sites, two coastal sites in four fast developing regions of China (i.e. Beijing-Tianjin-Hebei region, Yangtze River Delta, Pearl River Delta and Sichuan Basin), and two ship cruise measurements covered the East China Sea and Yellow Sea of China. The high average concentrations of PM2.5 and the occurrences of extreme cases at most sites imply the widespread air pollution in China. Fine particles were largely composed of organic matter and secondary inorganic species at most sites. High correlation between the temporal trends of PM2.5 and secondary species of urban and regional sites highlights the uniformly distributed air pollutants within one region. Secondary inorganic species were the dominant contributors to the high PM2.5 concentration in Northern China. However in Southern China, the relative contributions of different chemical species kept constant as PM2.5 increased. This study provides us a better understanding of the current state of air pollution in diversified Chinese cities. Analysis of chemical signatures of PM2.5 could be a strong support for model validation and emission control strategy.

Item Type: Article
Subjects : Civil & Environmental Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
AuthorsEmailORCID
Zheng, JUNSPECIFIEDUNSPECIFIED
Hu, MUNSPECIFIEDUNSPECIFIED
Peng, JUNSPECIFIEDUNSPECIFIED
Wu, ZUNSPECIFIEDUNSPECIFIED
Kumar, PUNSPECIFIEDUNSPECIFIED
Li, MUNSPECIFIEDUNSPECIFIED
Wang, YUNSPECIFIEDUNSPECIFIED
Guo, SUNSPECIFIEDUNSPECIFIED
Date : 21 June 2016
Identification Number : 10.1016/j.chemosphere.2016.06.032
Copyright Disclaimer : © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Air pollution; China; PM2.5; Chemical properties; Secondary inorganic ions
Depositing User : Symplectic Elements
Date Deposited : 29 Jun 2016 14:51
Last Modified : 29 Jun 2016 14:51
URI: http://epubs.surrey.ac.uk/id/eprint/811075

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