太原市夏季O_(3)污染过程VOCs污染特征研究  

Study on VOCs Pollution Characteristics of Summer O_(3) Pollution Process in Taiyuan

作　　者：王炳西 崔阳 郭利利 王振涛 任明权 龙腾飞 何秋生 Wang Bingxi;Cui Yang;Guo Lili;Wang Zhentao;Ren Mingquan;Long Tengfei;He Qiusheng(School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;Department of Materials Environmental Engineering,Shanxi Polytechnic College,Taiyuan Shanxi 030000,China)

机构地区：[1]太原科技大学环境与资源学院,山西太原030024 [2]山西职业技术学院材料环境工程系,山西太原030000

出　　处：《山西化工》2025年第2期267-270,共4页Shanxi Chemical Industry

基　　金：国家重点研发计划资助(2023YFC3709500);国家自然科学基金项日(42077201、22076135);太原市细颗粒物和臭氧污染协同防控“一市一策”驻点跟踪研究项目(DOGG202107);山西省基础研究计划项目(202103021223300);山西省研究生优秀创新项目(2022Y687、2021Y686)。

摘　　要：为了更好地了解太原市O_(3)污染期VOCs污染特征,本研究于2024年6月14日至22日使用GC5000在线仪器在太原市桃园站进行采样,共检测了56种VOCs,分析了VOCs的污染特征,并通过臭氧生成潜势(OFP)法量化了活性物种对O_(3)生成的影响。研究结果如下:太原市夏季O_(3)污染与高温、低湿、低风速等气象条件有关,同时O_(3)前体物VOCs和NO_(2)浓度突出,易造成O_(3)污染。太原市TVOCs体积分数均值为10.30×10^(-9),烷烃为主要组分(67.1%),其次是烯烃(12.4%)、炔烃(11.7%)、芳香烃(8.8%),前10种物种浓度占总浓度的91.3%,主要物种有乙烷、丙烷、乙炔、乙烯、正丁烷,O_(3)污染日TVOCs均值(10.96×10^(-9))高于非污染日(8.24×10^(-9))。由日变化图分析可得,应重点关注早晚交通高峰期VOCs源的排放。太原市OFP均值为20.21×10^(-9),烯烃贡献率最高(58.2%),O_(3)污染日烯烃贡献率较非污染日更突出。结合浓度与OFP来看,关键活性物种主要为乙烯、乙烷、乙炔、正丁烷,夏季O_(3)防控应重点关注活性物种的减排,本研究能够为太原市未来夏季O_(3)防控提供科学依据。In order to better understand the VOCs pollution characteristics during the O_(3) pollution period in Taiyuan City,this study used GC5000 online instrument to conduct sampling at Taoyuan Station in Taiyuan City from June 14 to 22,2024.A total of 56 VOCs were detected and the pollution characteristics of VOCs were analyzed.The ozone generating potential(OFP)method was used to quantify the effect of active species on O_(3) generation.The research results are as follows:The summer O_(3) pollution in Taiyuan is related to meteorological conditions such as high temperature,low humidity and low wind speed,and the concentration of O_(3) precursors VOCs and NO_(2) is prominent,which is easy to cause O_(3) pollution.The average concentration of TVOCs in Taiyuan City was 10.30 ppbv,with alkane as the main component(67.1%),followed by alkene(12.4%),alkynes(11.7%)and aromatics(8.8%).The concentration of the top 10 species accounted for 91.3% of the total concentration,and the main species were ethane,propane,acetylene,ethylene and n-butane.The mean value of TVOCs on O_(3) polluted days(10.96×10^(-9))was higher than that on non-polluted days(8.24×10^(-9)).According to the daily variation chart analysis,the emission of VOCs sources should be paid more attention to during the morning and evening peak traffic hours.The average OFP of Taiyuan City is 20.21×10^(-9),and the alkene contribution rate is the highest(58.2%),and the alkene contribution rate on O_(3) polluted days is more prominent than that on non-polluted days.From the perspective of concentration and OFP,the key active species are mainly ethylene,ethane,acetylene and n-butane,and the prevention and control of O_(3) in summer should focus on the emission reduction of active species.This study can provide a scientific basis for O_(3) prevention and control in Taiyuan City in summer in the future.

关 键 词：臭氧(O_(3)) 太原市 挥发性有机物(VOCs) 污染特征 臭氧生成潜势(OFP) 

分 类 号：X511[环境科学与工程—环境工程]