Contribution of ship emissions to the fine particulate in the community near an international port in Hong Kong
Contribution of ship emissions to the fine particulate in the community near an international port in Hong Kong
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DOI：
10.1016/j.atmosres.2012.12.009
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发表时间：
2013-04
影响因子：
5.5
通讯作者：
P. S. Yau;Shun-cheng Lee;Yan Cheng;Yu Huang;S. Lai;X. H. Xu
中科院分区：
文献类型：
--
作者：
P. S. Yau;Shun-cheng Lee;Yan Cheng;Yu Huang;S. Lai;X. H. Xu
船舶尾气中的细颗粒物已被证明对人体健康有害。为进一步了解船舶废气排放对港口居民区颗粒物水平的影响，于2009年8月至2010年3月期间，在香港葵涌和青衣货柜码头附近收集了细颗粒物(PM2.5)。PM2.5平均浓度为30.5μg/m~3。通过源解析，论证了船舶排放对集装箱港口附近细颗粒物的贡献。通过正矩阵分解(PMF)分析，确定了残渣油(RO)燃烧、船用柴油(MDO)燃烧、机动车尾气排放、燃煤、焚烧、地壳和海盐、次生硫酸盐和次生硝酸盐等8种潜在污染源。在确定的污染源中，RO燃烧和MDO燃烧被视为船舶排放，分别占PM2.5的12%和7%。二次硫酸盐含量为1.8μg/m~3(6%)相当于反渗透燃烧产生的一次细颗粒物3.6μg/m~3。加上船舶排放的一次颗粒物，采样点与船舶排放有关的环境PM2.5总量为7.6μg/m~3(25%)。
Fine particulates from ship exhaust are proved to be harmful to human health. To better understand the impact of ship emissions on the particulate matter (PM) level of port-side residential areas, fine particulates (PM2.5) were collected near Kwai Chung and Tsing Yi Container Terminals (KTCT) in Hong Kong during August 2009 to March 2010. The average PM2.5concentration was 30.5μg/m3. The contribution of ship emissions on fine particulates near the container port was demonstrated by source apportionment. By positive matrix factorization (PMF) analysis, eight potential sources, i.e., residual oil (RO) combustion, marine diesel oil (MDO) combustion, vehicle emission, coal combustion, incineration, crustal and sea-salt, secondary sulfate and secondary nitrate were identified. Among the identified sources, RO combustion and MDO combustion were regarded as ship emissions and accounted for 12% and 7% of PM2.5respectively. An estimate of 1.8μg/m3(6%) of secondary sulfate corresponded to 3.6μg/m3of primary fine particulates from RO combustion. Together with primary PM emitted from ships, the total ambient PM2.5mass associated with ship emissions at the sampling site was 7.6μg/m3(25%).