新疆独山子区VOCs组成及其对O3和SOA的贡献

张渊钰; 王新明; 刘晓玲; 张艳利; 迪丽努尔·塔力甫; 张潇潇; 阿布力克木·阿不力孜; 刘伟

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (5) : 1915-1923.

大气污染与控制

新疆独山子区VOCs组成及其对O₃和SOA的贡献

张渊钰¹, 王新明², 刘晓玲¹, 张艳利², 迪丽努尔·塔力甫¹, 张潇潇¹, 阿布力克木·阿不力孜¹, 刘伟³

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Volatile organic compounds (VOCs) in Dushanzi, Xinjiang: Compositions and contributions to the formation of O₃ and SOA

ZHANG Yuan-yu¹, WANG Xin-ming², LIU Xiao-ling¹, ZHANG Yan-li², DILINUER·Talip¹, ZHANG Xiao-xiao¹, ABULIKEMU·Abulizi¹, LIU Wei³

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摘要

参照美国环保署USEPATO-14标准方法，分别于非采暖、采暖和沙尘期采集新疆独山子区空气样品，用预浓缩仪和气相色谱/质谱联用系统对其挥发性有机物（VOCs）进行分析.结果表明，采样期间独山子区各类VOCs对总VOCs的贡献大小依次是：烷烃（61.80%） > 烯烃（18.62%） > 芳香烃（10.16%） > 乙炔（9.42%）；用气溶胶生成系数（FAC）估算VOCs的二次有机气溶胶（SOA）生成潜势表明，对SOA生成贡献最大的是芳香烃，在非采暖、采暖和沙尘期的贡献率分别为97.80%、87.28%和69.52%；用SPSS软件和广义相加模型（GAM）分析气象因素、VOCs、O₃及NOx之间的关系，表明高温干燥天气有利于O₃生成，且独山子区O₃生成主要受VOCs控制，一些烯烃（如1-丁烯）与O₃呈显著线性关系.

Abstract

Air samples were collected in the Dushanzi district of Xinjiang Uyghur Autonomous Region, China during the non-heating, heating and sandstorm periods for the analysis of volatile organic compounds (VOCs) by a preconcentrator coupled to a gas chromatography/mass spectrometer according tothe USEPATO-14 standard method. The results showed that group compositions of VOCs in Dushanzi district during the sampling period were ranked in the order ofalkanes (61.80%), alkenes (18.62%), aromatics (10.16%) and acetylene (9.42%). The secondary organic aerosol (SOA) formation potentials of VOCs as estimated by fractional aerosol coefficient (FAC) method revealed that aromatics contributed the most to SOA formation during non-heating, heating and sandstorm period, with contribution percentages of 97.8%, 87.28% and 69.52%, respectively. SPSS software and generalized additive model (GAM) were used to analyze the relationships among meteorological factors, VOCs, O₃ and NO_x. The results demonstrated that high temperature and dry weather were conducive to the formation of O₃. The O₃ formation in Dushanzi district seemed to be VOCs-limited, and alkenes such as 1-butene showed significant linear correlation with O₃.

导出引用

张渊钰, 王新明, 刘晓玲, 张艳利, 迪丽努尔·塔力甫, 张潇潇, 阿布力克木·阿不力孜, 刘伟. 新疆独山子区VOCs组成及其对O₃和SOA的贡献[J]. 中国环境科学. 2020, 40(5): 1915-1923

ZHANG Yuan-yu, WANG Xin-ming, LIU Xiao-ling, ZHANG Yan-li, DILINUER·Talip, ZHANG Xiao-xiao, ABULIKEMU·Abulizi, LIU Wei. Volatile organic compounds (VOCs) in Dushanzi, Xinjiang: Compositions and contributions to the formation of O₃ and SOA[J]. China Environmental Science. 2020, 40(5): 1915-1923

中图分类号： X511

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