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  Non-polar organic compounds in marine aerosols over the northern South China Sea: Influence of continental outflow

Zhao, Y., Zhang, Y., Fu, P., Ho, S. S. H., Ho, K. F., Liu, F., et al. (2016). Non-polar organic compounds in marine aerosols over the northern South China Sea: Influence of continental outflow. Chemosphere, 153, 332-339. doi:10.1016/j.chemosphere.2016.03.069.

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 Creators:
Zhao, Yan1, Author
Zhang, Yingyi1, Author
Fu, Pingqing1, Author
Ho, Steven Sai Hang1, Author
Ho, Kin Fai1, Author
Liu, Fobang2, Author              
Zou, Shichun1, Author
Wang, Shan1, Author
Lai, S.2, Author              
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1external, ou_persistent22              
2Multiphase Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826290              

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 Abstract: Filter samples of total suspended particle (TSP) collected during a cruise campaign over the northern South China Sea (SCS) from September to October 2013 were analyzed for non-polar organic compounds (NPOCs) as well as organic carbon (OC), elemental carbon (EC) and water-soluble ions. A total of 115 NPOCs species in groups of n-alkanes, polycyclic aromatic hydrocarbons (PAHs), iso-/antiso-alkanes, hopanes, steranes, methylalkanes, branched alkanes, cycloalkanes, alkenes and phthalates were detected. The characteristics of NPOCs in marine TSP samples were investigated to understand the sources from the Asian continent and other regions. The concentrations of total NPOCs ranged from 19.8 to 288.2 ng/m(3) with an average of 87.9 ng/m(3), which accounted for 0.8-1.7% (average 1.0%) of organic matter (OM). n-Alkanes was the predominant group, accounting for 43.1-79.5%, followed by PAHs (5.5-44.4%) and hopanes (1.6-11.4%). We found that primary combustion (biomass burning/fossil fuel combustion) was the dominant source for the majority of NPOCs (89.1%). Biomass burning in southern/southeastern China via long-range transport was proposed to be a major contributor of NPOCs in marine aerosols over the northern SCS, suggested by the significant correlations between nss-K+ and NPOCs groups as well as the analysis of air mass back-trajectory and fire spots. For the samples with strong continental influence, the strong enhancement in concentrations of n-alkanes, PAHs, hopanes and steranes were attributed to fossil fuel (coal/petroleum) combustion. In addition, terrestrial plants waxes were another contributor to NPOCs. (C) 2016 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
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Title: Chemosphere
  Other : Chemosphere
Source Genre: Journal
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Publ. Info: Oxford : Pergamon
Pages: - Volume / Issue: 153 Sequence Number: - Start / End Page: 332 - 339 Identifier: ISSN: 0045-6535
CoNE: https://pure.mpg.de/cone/journals/resource/974392605047