由固体燃料燃烧产生的与粗颗粒结合的化和氧化多环芳的排放量
Yaoxing Feng1, Jinze Wang2, Jie Sun1
1Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China.
Chemosphere
|November 19, 2023
概括
住宅用固体燃料的燃烧释放出大量的化和氧化多环芳 (nPAH和oPAH). 与煤炭相比,燃烧生物质会排放出更高水平的这些污染物,影响细颗粒和大气组成.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 燃烧科学 燃烧科学
背景情况:
- 来自住宅燃烧的父多环芳 (PAHs) 已得到充分研究.
- 关于PAH衍生物,特别是化PAH (nPAH) 和氧化PAH (oPAH) 的数据是有限的.
- 住宅固体燃料的燃烧是室内和室外空气污染的重要来源.
研究的目的:
- 从农村家庭的各种固体燃料和炉中测量PM10结合的nPAH和oPAH的排放因子 (EF).
- 为了比较生物质和煤炭燃烧之间的nPAH和oPAH排放.
- 为了研究这些PAH衍生物的颗粒大小分布和化学成分概况.
主要方法:
- 对PM10结合的nPAHs和oPAHs的现场测量.
- 燃烧实验涉及八种不同的固体燃料在三个不同的炉类型.
- 对12个独特的燃料炉组合进行分析.
- 粒子大小分布和化学成分的表征.
主要成果:
- 在燃料炉组合中,排放因子差异很大 (超过三级).
- 与燃烧煤炭相比,燃烧生物质对nPAHs (2.2倍) 和oPAHs (14.8倍) 的EF值显著更高.
- 发现PAH衍生物优先与细颗粒 (PM10) 结合.
- nPAHs和oPAHs的组成概况在燃料类型之间显著不同,并在大气运输过程中发生变化.
结论:
- 本研究解决了关于住宅固体燃料燃烧产生的nPAH和oPAH排放的关键数据缺口.
- 研究结果强调生物质燃烧是这些有害的PAH衍生物的主要贡献者.
- 结果为评估与国内燃料使用相关的环境和健康影响提供了必要的数据.
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