野火增加了下风社区危险空气污染物的度
R Byron Rice1, Katie Boaggio2, Nicole E Olson1
1US EPA, Office of Research and Development, Durham, North Carolina 27709, United States.
Environmental science & technology
|December 5, 2023
概括
野火烟雾含有危险的空气污染物 (HAP),在烟雾影响的日子里增加. 这项研究发现甲,乙甲和阿克罗莱因含量较高,有助于减少公众暴露.
科学领域:
- 环境健康 环境健康
- 大气化学 大气化学
- 公共卫生 公共卫生
背景情况:
- 由于气候变化,野火活动正在增加,烟雾对公众健康构成更大的风险.
- 关于野火烟雾对健康的影响的研究主要集中在细颗粒物 (PM2.5).
- 危险空气污染物 (HAP) 是与癌症和严重健康影响相关的化学物质,需要在野火烟雾中进行更好的表征.
研究的目的:
- 从2006年到2020年,分析美国西部野火烟雾中21种HAP的度.
- 在受野火 (2017-2020) 影响的主要人口中心 (加利福尼亚州圣何塞) 检查HAP度.
- 为了确定在野火烟雾事件中显著升高的特定HAP.
主要方法:
- 来自美国西部309个监测地点的HAP度分析.
- 从加利福尼亚州圣何塞检查了野火事件期间的HAP数据.
- 烟雾影响天和非烟雾天的HAP水平的统计比较.
主要成果:
- 在受到烟雾影响的日子里,乙甲基,烯素,甲,,和四乙烯的度显著更高.
- 在受到烟雾影响的日子里,甲呈现出最大的中位数增加 (43%).
- 乙甲和阿克罗莱因也显示显著增加 (分别为36%和34%).
结论:
- 野火烟雾含有高水平的特定危险空气污染物.
- 甲化物,乙化物和阿克罗莱因是森林火灾烟雾中关键的关注HAP.
- 描述这些HAP对于降低风向下社区的公共卫生风险至关重要.
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