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在北京COVID-19之前和之后的VOC污染特征和来源差异

Hanfei Zuo¹, Yuchun Jiang², Jing Yuan¹

¹State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150006, China.

The Science of the total environment

|October 13, 2023

概括

由于COVID-19大流行,北京的挥发性有机化合物 (VOC) 总体减少,但车辆和药品排放量增加. 车辆排放的挥发性有机化合物对健康造成的风险和臭氧形成潜力最高.

科学领域:

大气化学大气化学
环境科学环境科学
公共卫生公共卫生

背景情况:

COVID-19大流行改变了人类活动,为研究其对大气挥发性有机化合物 (VOC) 的影响提供了独特的机会.
了解这些变化对于评估城市环境中的空气质量和健康风险至关重要.

研究的目的:

在2019-2020年期间分析北京的VOC度,成分和来源.
评估与流行病相关的生活方式和生产变化对VOCs的影响.
评估与不同VOC来源相关的健康风险和臭氧形成潜力.

主要方法:

分析北京朝阳区的VOC度和成分.
应用正矩阵因子化 (PMF) 模型来识别排放源.
计算臭氧形成潜力 (OFP) 和二次有机气溶形成潜力 (SOAFP).

主要成果:

与2019年相比,2020年总体VOC度下降,其中基是主要成分.
2020年,异坦,n-坦,n-和氧化VOC (OVOC) 的度增加.
车辆和药品排放量增加,而煤炭燃烧量减少;车辆的VOC显示出二次生成和致癌风险的最大潜力.

结论:

疫情引起的变化显著改变了北京的VOC概况和来源.
汽车和工业排放仍然是健康风险的主要原因,超过了可接受的致癌水平.
针对性的排放控制策略,特别是对车辆的排放控制策略,对于改善空气质量和公共健康至关重要.

关键词:

评估健康风险评估健康风险这是一个PMF模型.制药行业制药行业制药行业二次形成潜在的二次形成潜力挥发性有机化合物挥发性有机化合物

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