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在PM_2.5中的p-phenylenediamine抗氧化剂:在正矩阵因数分解源分配中交通的新标记

Nan Jiang¹, Xuexin Hao¹, Zichen Wang¹

¹School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China.

Journal of hazardous materials

|July 10, 2024

概括

现在,p-phenylenediamine (PPD) 抗氧化剂被认为是汽车排放的关键指标. 在源分配模型中使用PPD可以准确地识别出交通对PM2.5污染的贡献,与传统标记物不同.

科学领域:

环境化学环境化学
大气科学大气科学
分析化学分析化学

背景情况:

制品释放p-phenylenediamine (PPD) 抗氧化剂,导致环境污染.
以前的研究集中在PM2.5-bound PPD的污染特征和健康风险上.

研究的目的:

提供PM2.5.5中PPD和6PPD-Q的长期数据.
建议PPD作为来源分配中的车辆排放的新型标记.

主要方法:

在PM2.5样本中收集了PPD和6PPD-Q的长时间规模数据.
使用正矩阵因数分解 (PMF) 与PPD进行源分配.

主要成果:

在100%的冬季PM2.5样本中检测到PPD和6PPD-Q.
纳入PPD可以将估计的交通源对PM2.5的贡献从13.5%降至9.5%.
由于与其他来源的重叠,传统标记者高估了车辆贡献的三分之一以上.

结论:

PPD是车辆排放的特定和有效标记.
在PMF中使用PPD可以为PM2.5.5提供更准确的来源分配.
这一发现支持改善污染控制政策,特别是随着新能源汽车的兴起.

关键词:

6PPD - 氨酸 - 氨酸的使用情况长时间尺度的时间尺度.新的标记器新的标记器这种抗氧化剂是PPD抗氧化剂.流量来源的流量来源.

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