Characterisation of single particles from in-port ship emissions
Characterisation of single particles from in-port ship emissions
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DOI：
10.1016/j.atmosenv.2009.07.039
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发表时间：
2009-12-01
影响因子：
5
通讯作者：
Wenger, John C.
中科院分区：
文献类型：
--
作者：
Healy, Robert M.;O'Connor, Ian P.;Wenger, John C.
船舶排放可能严重影响港口城市的空气质量。在这项研究中，使用气溶胶飞行时间质谱仪（ATOFMS）和一套实时仪器，在爱尔兰科克港的一个地点调查了新排放的单个船舶废气颗粒的大小和组成。利用K-means算法对收集到的光谱进行聚类，确定了一个独特的船舶废气类别，该类别含有内部混合的元素和有机碳、钠、钙、铁、钒、镍和硫酸盐。在2008年8月为期三周的测量期间，观测到该粒子类型的尖锐发射事件超过20次。在这些事件期间，还观察到硫酸盐、单质碳和直径小于2.5 μ m的颗粒（PM2.5）的质量浓度同时增加。同步扫描迁移率粒度仪（SMPS）测量结果表明，绝大多数新排放的船舶废气颗粒处于超细模式(
Emissions from shipping traffic may impact severely upon air quality in port cities. In this study, the size and composition of freshly emitted individual ship exhaust particles has been investigated using an aerosol time-of-flight mass spectrometer (ATOFMS) co-located with a suite of real-time instrumentation at a site in the Port of Cork, Ireland. The collected spectra were clustered using the K-means algorithm and a unique ship exhaust class containing internally mixed elemental and organic carbon, sodium, calcium, iron, vanadium, nickel and sulfate was identified. Over twenty sharp emission events were observed for this particle type during the three week measurement period in August 2008. Coincident increases in mass concentrations of sulfate, elemental carbon and particles below 2.5 mu m in diameter (PM2.5) were also observed during these events. Simultaneous scanning mobility particle sizer (SMPS) measurements indicate that the vast majority of freshly emitted ship exhaust particles lie in the ultrafine mode (