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Discussion papers
https://doi.org/10.5194/acp-2019-363
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-363
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 09 Jul 2019

Submitted as: research article | 09 Jul 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Size-segregated characteristics of OC, EC and organic matters in PM emitted from different types of ships in China

Fan Zhang1,2, Hai Guo1, Yingjun Chen2,3,4, Volker Matthias5, Yan Zhang2, Xin Yang2,4, and Jianmin Chen2 Fan Zhang et al.
  • 1Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China
  • 2Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200092, P.R. China
  • 3Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China
  • 4Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
  • 5Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Max-Planck-Straße 1, 21502 Geesthacht, Germany

Abstract. Studies of detailed chemical compositions in particles with different size ranges emitted from ships are in serious shortage. In this study, size-segregated distributions and characteristics of particle mass, organic carbon (OC), elemental carbon (EC), 16 EPA PAHs and 25 n-alkanes measured on board of 12 different vessels in China were given. The results showed that: (1) More than half of the total particle mass, OC, EC, PAHs and n-alkanes were concentrated in fine particles with aerodynamic diameter (Dp) < 1.1 μm for most of the tested ships, basically presenting downward distribution trends with the increase of particle size. However, different types of ships showed quite different particle size-dependent chemical compositions. (2) In fine particles, the OC and EC were the dominant components, while in coarse particles, OC and EC only accounted for very small proportions. With the increase of particle size, the OC to EC ratios first decreased and then increased, having the lowest values for particle sizes between 0.43 μm and 1.1 μm. (3) OC1, OC2 and OC3 were the dominant OC fragments for all the tested ships, while EC1 and EC2 were the main EC fragment for ships running on heavy fuel oil (HFO) and marine diesel fuel, respectively; Different OC and EC fragments presented different distributions in different particle sizes. (4) Low power diesel fishing boats (LPDF) had much higher PAHs emission ratios than high power diesel vessels (HPDV) and heavy fuel oil vessel (HFOV) in fine particles, and HFOV had the lowest values. (5) PAHs and n-alkanes showed different profile patterns for different types of ships and also in different particle size bins, which meant that the particle size should be considered when source apportionment was conducted. It is also noteworthy from the results in this study that the smaller the particle size, the more toxic the particle was, especially for the fishing boats in China.

Fan Zhang et al.
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Short summary
Particulate matters emitted from ships have gained more and more attention in recent decades. OM, EC, water-soluble ions and heavy metals in PM and particle numbers are the main concerned points. However, studies of detailed chemical compositions in particles with different size ranges emitted from ships are in serious shortage. This study could bring new and detailed measurement data in the field of size-segregated particles from ships and have a great source emission influence interest.
Particulate matters emitted from ships have gained more and more attention in recent decades....
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