生态环境学报2025，Vol.34Issue(4)：548-555,8.DOI:10.16258/j.cnki.1674-5906.2025.04.005
太原市春夏季VOCs组成特征及其对二次有机气溶胶和臭氧的贡献
Characteristics of Volatile Organic Compounds and its Contribution to Secondary Organic Aerosol and Ozone in Spring and Summer in Taiyuan
摘要
Abstract
Based on observations of VOCs in the spring and summer of 2023,combined with meteorological data,the composition,pollution,and diurnal variation characteristics of VOCs were analyzed in Taiyuan.The ozone formation potential(OFP)and secondary organic aerosol formation potential(SOAFP)of the VOCs were evaluated using MIR,equivalent propylene concentration,and FAC coefficients.The results showed that the average hourly volume fraction of VOCs in spring and summer was 20.03×10-9,and alkane and OVOCs were the most abundant components.The total VOCs concentration exhibited a bimodal mode,with peaks occurring at 10:00 and 22:00.The diurnal variation characteristics of alkanes,olefins,acetylene,and aromatic hydrocarbons were consistent with the concentrations of TVOCs;however,OVOCs showed an opposite trend to other VOCs species,indicating that OVOCs were affected by primary emissions and secondary formation.The toluene/benzene(T/B)ratios indicated that the VOCs in the spring and summer in Taiyuan were mainly influenced by vehicle exhaust and biomass combustion.The total SOAFP was up to 25.37×10-2 μg∙m-3,with aromatic hydrocarbons being the dominant species,contributing over 90%.The OFP of the total VOCs reached 49.06×10-9,and the equivalent propylene concentration was 3.99×10-9.The order was olefins>OVOCs>aromatics>alkanes>acetylene,indicating that olefins and OVOCs contributed to the formation of O3.The effective control of paint solvents and industrial production emissions will be conducive to controlling the generation of SOA in Taiyuan.Control of vehicle emissions is an effective measure for reducing O3 pollution.关键词
太原市/挥发性有机物/污染特征/二次有机气溶胶生成潜势/臭氧生成潜势Key words
Taiyuan/volatile organic compounds/pollution characteristics/secondary organic aerosol formation potential/ozone formation potential分类
环境科学引用本文复制引用
陈思宇,孙丽娟,苏枞枞,于兴娜..太原市春夏季VOCs组成特征及其对二次有机气溶胶和臭氧的贡献[J].生态环境学报,2025,34(4):548-555,8.基金项目
国家重点研发计划项目(2019YFC0214604) （2019YFC0214604）
