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在商业城的移动VOC测量,CO揭示了来自不同来源的排放

Madison Rutherford^1,2, Abigail Koss³, Joost de Gouw^1,2

¹Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA.

Journal of the Air & Waste Management Association (1995)

|July 15, 2024

概括

移动测量确定了石油炼油厂和木工厂是商业城 (CO) 挥发性有机化合物 (VOC) 的关键来源.一个更简单的比较分析证明比积极矩阵因子化 (PMF) 在这个城市地区的VOC来源归因中更有效.

科学领域:

环境科学环境科学
大气化学大气化学
空气污染研究研究

背景情况:

由于多个排放源,城市地区挥发性有机化合物 (VOC) 的来源归因是复杂的.
带有飞行时间质谱仪 (TOF-MS) 的移动实验室提供高空间分辨率数据,用于识别排放源.
像正矩阵分解 (PMF) 这样的传统方法面临着移动数据的挑战,包括计算强度和对化学转换的敏感性.

研究的目的:

评估正矩阵因子化 (PMF) 的有效性和使用移动测量进行 VOC 源归因的更简单的比较分析方法.
确定导致科罗拉多州商业城Elyria Swansea社区VOC度的主要来源.

主要方法:

使用一个配备了PTR-TOF-MS的移动实验室收集商业城市的VOC测量,CO.
在收集的移动数据中应用了正矩阵因数分解 (PMF) 和比较分析方法.
对PMF的性能进行比较,并对差异化和归因VOC来源进行比较分析.

主要成果:

PMF努力区分炼油厂和交通排放,并确定其他关键来源.
对比分析成功地确定了炼油厂是VOC的重要贡献者,包括.
一个废水处理厂与甲乙醇和二甲基硫化物有关,而一家木工厂被确定为烯和溶剂的超局部来源.

结论:

对比分析是使用移动数据来归因VOC来源的宝贵工具,在本研究中表现优于PMF.
炼油厂和木工厂的排放对埃利里亚斯旺西附近的VOC水平产生重大影响.
调查结果为丹佛的居民和监管机构提供了关于城市空气污染和移动监测策略的关键见解.

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