在香燃烧颗粒中通过O3和OH氧化通过单颗粒混合状态分析形成二次气溶
Zhancong Liang1, Liyuan Zhou1, Xinyue Li2
1School of Energy and Environment, City University of Hong Kong, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, Shenzhen, China.
The Science of the total environment
|June 17, 2023
概括
烧香会释放出污染物,形成二次酸盐和有机气溶. 光化学氧化,特别是在紫外线下,显著增强了这些颗粒中的酸盐形成.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 气溶科学 气溶科学
背景情况:
- 烧香是一种广泛的宗教习惯,它会排放出大量的气体和颗粒污染物.
- 这些排放的大气氧化会导致二次污染物的形成,影响空气质量.
研究的目的:
- 为了研究在不同条件下燃烧香烟的气体氧化,在不同条件下燃烧香烟的气体氧化.
- 为了识别香烟烟雾颗粒中的化学转化和二次污染物形成.
主要方法:
- 使用氧化流反应器来模拟香料羽毛的大气老化.
- 使用单颗粒气溶质谱法 (SPAMS) 来分析粒子组成.
- 暴露在臭氧 (O3) 中的粒子,有或没有紫外线 (UV) 光.
主要成果:
- 在香料颗粒中观察到显著的酸盐形成,主要来自含的有机化合物.
- 光化学氧化 (紫外线) 与仅暴露于臭氧相比,极大地增强了酸盐的形成,可能是通过基 (OH) 化学反应.
- 臭氧-紫外线衰老的颗粒显示出增加的氧化和功能化,检测到二级有机气溶 (SOA) 组分,如酸盐和酸.
结论:
- 在大气光化学氧化过程中,酸盐和SOA在烧香颗粒中迅速形成.
- 了解这些过程对于评估宗教焚烧活动对空气污染的影响至关重要.
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