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Source apportionment analysis of winter 2016 Neil Armstrong Academy data (West Valley City, Utah)

机译：2016年冬季尼尔·阿姆斯特朗学院数据的来源分配分析（犹他州西瓦利城）

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摘要

A significant need exists to better characterize air pollution and its sources. This especially pertains to fine particulate matter (PM2.5). PM2.5 is chemically complex and its sources of emission and secondary production are highly variable. PM2.5 complexity is largely due to the organic fraction, which ranges from 10 to 90% of its total mass. However, the organic compounds in PM2.5 have generally not been monitored in the field due to limitations in available sampling techniques. A source apportionment study was conducted at the Neil Armstrong Academy campus, 5194 Highbury Pkwy, West Valley City, UT 84120, during January and February 2016. Among the objectives of the study was to identify winter-time sources of fine particulate material in West Valley City, Utah. Fine particulate mass and components, particulate organic marker and related gas phase species were all measured on an hourly average basis. The following hourly averaged data were used in the Positive Matrix Factorization (PMF) analysis, fine particulate mass, cations and anions, carbonaceous material, organic marker compounds, gas phase species including NOx, NO2 and CO and mass spectrometric measurements of gas phase methanol and C8 aromatics.A total of 557 hourly averaged data sets with 23 components were available for an EPA Positive Matrix Factorization (v5.0) analysis of the data set. The data were best described by a solution with 7 factors. Two of the factors were associated with emissions from mobile sources, diesel and automotive. One factor was associated with wood smoke emissions. Three factors were associated with the formation of secondary fine particulate material. The larger of the three was associated with the production of secondary nitrate and accounted for 70% of the PM2.5, while the other two were associated with secondary formation of particulate organic material from wood smoke associated gas phase organic compounds but accounted for only 3% of the total PM2.5 mass. The final factor was associated with fine particulate sulfate and SO2. Meteorological back-trajectory data clearly indicted the source was associated with emissions from a copper smelter to the west of the sampling site.
机译：迫切需要更好地表征空气污染及其来源。这尤其适用于细颗粒物（PM2.5）。 PM2.5在化学上很复杂，其排放源和二次生产变化很大。 PM2.5的复杂性很大程度上是由于有机物占总质量的10％至90％。但是，由于可用采样技术的局限性，通常未在现场对PM2.5中的有机化合物进行监测。于2016年1月至2016年2月，在犹他州西山谷市5194 Highbury Pkwy的尼尔·阿姆斯特朗学院校园内进行了源分配研究，研究地点为UT84120。该研究的目标是确定冬季西山谷中细颗粒物质的来源犹他州的城市。细颗粒物和组分，颗粒有机标记物和相关的气相种类均按每小时平均值进行测量。以下每小时平均数据用于正矩阵分解（PMF）分析，细颗粒质量，阳离子和阴离子，碳质材料，有机标记化合物，包括NOx，NO2和CO的气相种类以及气相甲醇和四氯化碳的质谱测量C8芳族化合物。总共557个小时的平均数据集，其中包含23种组分，可用于数据集的EPA阳性基质分解（v5.0）分析。最好用7个因素的解决方案来描述数据。其中两个因素与移动源（柴油和汽车）的排放有关。一个因素与木材烟雾排放有关。二次细颗粒物质的形成与三个因素有关。这三个中较大的一个与二次硝酸盐的产生有关，占PM2.5的70％，而另外两个与从木材烟雾相关的气相有机化合物中二次形成颗粒有机物有关，但仅占三个占总PM2.5质量的％。最终因素与细颗粒硫酸盐和SO2有关。气象回溯数据清楚地表明，污染源与采样点西侧的铜冶炼厂的排放有关。

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  • 来源
    《Atmospheric environment》 |2019年第12期|116971.1-116971.12|共12页
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  • 作者单位

    Brigham Young Univ Dept Chem & Biochem C100 Benson Provo UT 84602 USA;

    Sunset Lab Inc 10180 SW Nimbus Ave Suite J-5 Tigard OR 97223 USA;

    Utah Dept Environm Qual POB 144820 Salt Lake City UT 84114 USA;

    Univ Utah Dept Atmospher Sci William Browning Bldg 135 S 1460 E Room 819 Salt Lake City UT 84112 USA;

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  • 正文语种 eng
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  • 关键词

    Urban; Air quality; Source apportionment; Wood smoke;

    机译：城市空气质量;来源分配;木烟;

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