摘要
本研究解析大气污染物“前体物—化学转化—环境效应”的完整因果链,针对二氧化硫(SO_(2))、氮氧化物(NO_(x))及挥发性有机物(VOCs)等前体物,阐明其通过均相/非均相反应生成二次污染物的关键路径。量化揭示SO_(2)经氧化形成硫酸盐气溶胶,通过吸湿增长增大粒径以增强米氏散射效率,导致能见度衰退的核心机制;同时剖析臭氧光化学生成诱发健康风险、酸沉降引发生态失衡的级联效应。研究结果为协同管控一次排放与二次过程提供理论依据。
This study examines the complete causal chain of atmospheric pollutants,from their precursors to chemical transformations and environmental impacts.It focuses on sulfur dioxide(SO_(2)),nitrogen oxides(NO_(x)),and volatile organic compounds(VOCs)as precursors,elucidating the key pathways through which these precursors form secondary pollutants via both homogeneous and heterogeneous reactions.The study quantitatively reveals that SO_(2),when oxidized,forms sulfate aerosols.These aerosols increase in size through hygroscopic growth,enhancing the efficiency of Mie scattering and leading to a decline in visibility.Additionally,it analyzes the cascading effects of ozone photochemical generation,which pose health risks,and acid deposition,which leads to ecological imbalances.The findings provide a theoretical basis for the coordinated management of primary emissions and secondary processes.
作者
郑仲冬
Zheng Zhongdong(Ecological Environment Monitoring Station,Haibei Tibetan Autonomous Prefecture,Haibei 812200,China)
出处
《当代化工研究》
2025年第15期91-93,共3页
Modern Chemical Research
关键词
大气污染物
化学转化机制
二次气溶胶
酸沉降
光化学烟雾
air pollutants
chemical transformation mechanism
secondary aerosols
acid deposition
photochemical smog
