Source apportionment of fine particulate matter in Houston, TX, using organic molecular markers
Source apportionment of fine particulate matter in Houston, TX, using organic molecular markers
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DOI：
10.1016/s1352-2310(03)00075-x
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发表时间：
2003-05-01
影响因子：
5
通讯作者：
Buzcu, B
中科院分区：
文献类型：
--
作者：
Fraser, MP;Yue, ZW;Buzcu, B
使用环境浓度的分子标记物，化学质量平衡计算已经进行了估计的贡献源类别的环境细颗粒物水平在四个地点在休斯敦，得克萨斯州。使用与环境样品分析中使用的技术相当的分析方法获得的八个源分布用于计算。化学质量平衡模型准确地重建了24种分子标记物和3种细颗粒物化学成分的测量浓度，以估计每个来源对环境细颗粒物负荷的贡献。结果表明，在休斯顿市区的三个地点，柴油机排气对环境细颗粒物水平的贡献在1.6和3.7 mug m（-3）之间，而在逆风背景地点，柴油机排气代表0.5 mug m（-3）的环境细颗粒物。其他重要来源包括汽油动力车辆（三个市区地点为1.1-2.8 mug m（-3），背景地点为0.5 mug m（-3））;铺砌道路灰尘（1.0-2.8 mug m（-3）市区和0.1 mug m（-3）背景）;肉类烹饪操作（0.9-1.3 μ g m（-3）市区和0.7 μ g m（-3）背景）和木材燃烧（0.2 - 0.3 μ g m（-3）市区和<0.5 μ g m（-3）背景）。1 mug m（-3）背景）。在一个位于高度工业化的休斯顿船舶通道附近的站点，燃油燃烧贡献了估计1.5 mug m（-3），而燃油燃烧在其他站点不是重要的贡献。使用季节平均数据的模型运行表明，某些来源的季节之间的源强度变化很大（即春季和夏季的铺砌道路灰尘比冬季高得多），而其他来源的季节变化很小或没有季节变化（即车辆废气和肉类烹饪操作）。(C)2003爱思唯尔科技有限公司版权所有。
Using ambient concentrations of molecular markers, chemical mass balancing calculations have been performed to estimate the contribution of source categories to ambient fine particle levels at four sites in Houston, TX. Eight source profiles obtained using analytical methods equivalent to the techniques used in analysis of the ambient sample were used for the calculations. The chemical mass balancing model accurately reconstructed the measured concentrations of 24 molecular markers and three fine particle chemical components to estimate the contribution of each source to ambient fine particle loads. The results show that at three sites in the Houston urban area, diesel exhausts contribute between 1.6 and 3.7 mug m(-3) to ambient fine particle levels, while at an upwind background site, diesel exhausts represent 0.5 mug m(-3) of ambient fine particulate matter. Other important sources include gasoline-powered vehicles (1.1-2.8 mug m(-3) at three urban sites and 0.5 mug m(-3) at the background site); paved road dusts (1.0-2.8 mug m(-3) urban and 0.1 mug m(-3) background); meat cooking operations (0.9-1.3 mug m(-3) urban and 0.7 mug m(-3) background) and wood combustion (0.2 - 0.3 mug m(-3) urban and < 0. 1 mug m(-3) background). At one site located near the highly industrialized Houston Ship Channel, fuel oil combustion contributed an estimated 1.5 mug m(-3), while fuel oil combustion was not an important contribution at the other sites. Model runs using seasonally averaged data showed a high variation in source strength between seasons for some sources (i.e. paved road dusts much higher in the spring and summer than in the winter), while other sources showed little or no seasonal variation (i.e. vehicle exhausts and meat cooking operations). (C) 2003 Elsevier Science Ltd. All rights reserved.