朱惠丽,刘泽乾,薛彩凤,崔阳,李宏艳,何秋生,王新明

• 1:太原科技大学环境科学与工程学院
• 2:中国科学院广州地球化学研究所有机地球化学国家重点实验室

摘要(Abstract)：

本研究开展了太原市夏季大气臭氧(O_3)变化特征研究，并探讨NOx和主要VOCs组分对O_3贡献特征。结果显示，O_3浓度日高值在(65.00～286.00)μg/m~3之间，均值为188.52μg/m~3,期间45天超过国家空气质量二级标准。O_3日变化表现为9:00-14:00的快速升高，14:00-18:00呈现日均高值。O_3高值天气影响特征表现为白天持续高温(≥30℃),低湿度(≤35%),西风和西南风向影响(≥2 m/s).NO_X日高值在(31.00～234.00)μg/m~3变化，日变化表现为白天低、晚上高。主要前体物醛酮(OVOCs)(10.41 ppbv),烯烃(3.27 ppbv)和芳香烃(1.32 ppbv)的升高，导致O_3高值。VOCs对O_3生成贡献为108.00 ppbv, O_3高值天OFP从92.93 ppbv达到123.07 ppbv,上升32.44%,甲醛、乙醛和异戊二烯增长最大，达到17.42 ppbv、7.34 ppbv和6.35 ppbv.经过比值分析发现，太原市VOCs来源主要受西和西南方向焦化和煤炭行业区域传输影响，其OVOCs主要来自光化学反应的二次生成。

关键词(KeyWords)： 臭氧;VOCs;臭氧生成潜势;比值分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(42077201);; 国家生态环境部攻关项目(DQGG202107);; 太原科技大学博士启动基金(20202072)

作者(Author): 朱惠丽,刘泽乾,薛彩凤,崔阳,李宏艳,何秋生,王新明

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