State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
Sci Total Environ. 2017 Dec 31;607-608:339-350. doi: 10.1016/j.scitotenv.2017.06.214. Epub 2017 Jul 27.
Total suspended particle (TSP) samples were collected during a marine cruise in the East China Sea from May 18 to June 12, 2014. They were analyzed for solvent extractable organic compounds (lipid compounds, PAHs and phthalates) using gas chromatography/mass spectrometry (GC/MS) to better understand the sources and source apportionment of aerosol pollution in the western North Pacific. Higher concentrations were observed in the terrestrially influenced aerosol samples on the basis of five-day backward air mass trajectories, especially for aerosols collected near coastal areas. Phthalates were found to be the dominant species among these measured compound classes (707±401ngm for daytime and 313±155ngm for nighttime), followed by fatty acids, fatty alcohols, n-alkanes and PAHs. In general, the daytime abundances for these compounds are higher than nighttime, possibly attributable to more intensive anthropogenic activities during the daytime. The factor analysis indicates that biomass burning, fungal activities and fossil fuel combustion maybe the main emission sources for organic aerosols over the East China Sea. This study demonstrates that the East Asian continent can be a natural emitter of biogenic and anthropogenic organics to the marine atmosphere through long-range transport, which controls the chemical composition and concentration of organic aerosols over the East China Sea.
总悬浮颗粒物（TSP）样品于 2014 年 5 月 18 日至 6 月 12 日在东海的一次海洋巡航中收集。采用气相色谱/质谱联用仪（GC/MS）对其进行了可溶剂提取的有机化合物（脂类化合物、多环芳烃和邻苯二甲酸酯）分析，以便更好地了解西太平洋北部大气气溶胶污染的来源和源分配。根据五天的后向气团轨迹，在受陆地影响的气溶胶样品中观察到更高的浓度，特别是在靠近沿海地区收集的气溶胶中。在这些测量的化合物类别中，邻苯二甲酸酯是主要物质（白天为 707±401ngm，夜间为 313±155ngm），其次是脂肪酸、脂肪醇、正烷烃和多环芳烃。一般来说，这些化合物的白天丰度高于夜间，这可能是由于白天人类活动更加密集。因子分析表明，生物质燃烧、真菌活动和化石燃料燃烧可能是东海大气中有机气溶胶的主要排放源。本研究表明，通过长距离传输，东亚大陆可以成为海洋大气中生物源和人为源有机物的自然排放源，控制着东海大气中有机气溶胶的化学组成和浓度。
