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环境持久性自由基在尺寸解析的PM中的来源分配:对驱动氧化潜力和反应性氧物种生成的影响

Fanyi Wei¹, Sutong Wang¹, Yihan Guo¹

¹Department of Environmental Engineering, Xiamen University of Technology, Xiamen 361024, China.

Journal of hazardous materials

|October 28, 2025

概括

环境持久性自由基 (EPFR) 对大气的氧化潜力有显著的贡献. 生物质燃烧和海洋排放是关键驱动因素,特别是在远程运输方面.

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:

环境持久性自由基 (EPFR) 是大气污染物,其时空分布和健康影响尚不清楚.
长距离运输EPFR带来风险,需要研究它们的形成和影响.

研究的目的:

研究EPFRs的时间动态及其对氧化潜力 (OP) 和活性氧物种 (ROS) 的贡献.
确定影响EPFR水平和相关健康风险的来源和运输途径.

主要方法:

对EPFR进行的多探头比较分析,包括电子磁共振 (OP^EPR),迪二醇 (OP^DTT),模拟肺液 (OP^SLF) 和基根灭的迪二醇 (OP^OH) 测定.
整合气象数据,化学物种,来源分配和潜在来源贡献函数 (PSCF) 分析.

主要成果:

EPFR的成分从清洁时期的以氧为中心/半基因转变为以碳为中心/近接氧为中心的污染时期,与OP指标的显著增加相关.
有机基 (•R) 与过渡金属 (Cu,Fe,Zn,Mn,Tl) 在清洁时期 (可能是不完全燃烧) 相关联,而基 (•OH) 与Fe,Zn,K在污染时期 (可能是交通排放) 相关联.
海洋排放和生物质燃烧占ROS产量的63.06-85.39%,表明有大量的远程运输. 中国东南地区被确定为主要来源地区.

结论:

生物质燃烧和海洋排放是EPFR形成和OP / ROS产生的主要驱动因素,受到远程运输的重大影响.
了解EPFR动态对于评估大气环境和健康风险至关重要,特别是在受混合排放源影响的地区.

关键词:

在环境中持久的自由基.有氧化潜力可能存在.有反应性氧物种的反应性氧物种.来源分配的分配方式

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