环境化学2024，Vol.43Issue(1) ：297-310.DOI:10.7524/j.issn.0254-6108.2022061201

济南市典型区夏季VOCs分布特征及臭氧生成机制

Pollution characteristics of volatile organic compounds and mechanism of ozone formation in typical areas of Jinan,China

张桂芹 樊联欢 韩立钊 周梅 魏征 孙秀芹 魏小锋
环境化学2024，Vol.43Issue(1) ：297-310.DOI:10.7524/j.issn.0254-6108.2022061201
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  • 维普
  • 万方数据

济南市典型区夏季VOCs分布特征及臭氧生成机制

Pollution characteristics of volatile organic compounds and mechanism of ozone formation in typical areas of Jinan,China

张桂芹 1樊联欢 1韩立钊 2周梅 3魏征 4孙秀芹 5魏小锋1
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作者信息

  • 1. 山东建筑大学市政与环境工程学院,济南,250101
  • 2. 济南市生态环境局槐荫分局,济南,250021
  • 3. 济南市生态环境监控中心,济南,250014
  • 4. 山东省生态环境监测中心,济南,250101
  • 5. 核建利华科技工程有限公司,北京,102300
  • 折叠

摘要

基于2020年6-8月济南市石化区、市区和南部山区VOCs以及臭氧和气态污染物等在线监测数据,结合气象因素分析了各典型区夏季VOCs污染特征,并通过计算臭氧生成潜势(OFP)和MCM模型模拟分析了不同区域不同污染等级VOCs对臭氧生成的影响,采用PMF模型对市区夏季VOCs进行了来源解析研究.结果表明,石化区VOCs浓度(158.29 μg·m-3)明显高于市区(47.71 μg·m-3)和南部山区(24.65 μg·m-3),VOCs中均以烷烃占比最大,其次为芳香烃,3个区域VOCs浓度均随污染等级升高而升高;不同污染等级下均为石化区OFP(743.7-1474.9 μg·m-3)大于市区(156.9-378.1 μg·m3)和南部山区(113.4-168.7 μg·m-3),3个区域均是芳香烃OFP占比最大,其次为烯烃,说明芳香烃和烯烃类VOCs对臭氧生成的贡献最大,其中OFP贡献最大的单体为间/对-二甲苯;MCM模拟结果表明石化区O3净生成速率(33.51×10·9·h-1)最高,其次为市区(22.97×10-9·h-1)和南部山区(3.91×10-9·h-1);石化区的1-戊烯、甲苯、异戊二烯、间-乙基甲苯和邻二甲苯,市区的1-丁烯、间/对-二甲苯和顺式-2-丁烯,南部山区的顺式-2-丁烯、异戊二烯、反式-2-丁烯相对增量反应活性(RIR)较大,对臭氧生成的影响较为明显.PMF模型解析结果表明济南市区夏季燃烧源、移动源和餐饮油烟源对VOCs贡献较大.

Abstract

Pollution characteristics of volatile organic compounds(VOCs)in typical areas of Jinan,China,in summer were analyzed and simulated.The analyses were based on online monitoring data of VOCs,ozone(O3)and other related trace gases in a petrochemical area,urban area and southern mountainous area collected from June to August 2020,along with meteorological factors.The influence of different ozone pollution levels of VOC pollutants in different functional areas of Jinan on O3 formation was assessed by calculating the Ozone Formation Potential(OFP)and using a Master Chemical Mechanism(MCM)model.The sources of VOCs in urban areas in summer were analyzed by a Positive Matrix Factorization(PMF)model.The concentration of VOCs in the petrochemical area(158.29 μg·m-3)was significantly higher than that in the urban area(47.71 μg·m-3)and southern mountainous area(24.65 μg·m-3).Alkanes accounted for the largest proportion of VOCs,followed by aromatic hydrocarbons.The concentration of VOCs increased with increasing pollution level in all three areas.The calculated OFP in petrochemical areas(743.7-1474.9 μg·m-3)was higher than that in the urban area(156.9-378.1 μg·m-3)and southern mountainous area(113.4-168 μg·m-3).Alkene and aromatic hydrocarbons accounted for the largest proportion in three areas,indicating that these molecules contributed most to the formation of O3.The monomer with the largest contribution to OFP was m/p-xylene.MCM stimulation revealed the highest net rate of O3 formation in the petrochemical area(33.51×10-9·h-1),followed by urban area(22.97×10-9·h-1)and southern mountainous area(3.91× 10-9·h-1).Large increases in the relative incremental reaction activity were evident in the petrochemical area(1-pentene,toluene,isoprene,m-ethyl toluene,and o-xylene),urban area(1-butene,m/p-xylene,and cis-2-butene),and mountainous area(cis-2-butene,isoprene,and trans-2-butene).The increases had an obvious impact on O3 formation.The PMF model analytical results revealed that combustion source,mobile source,and cooking fume source contributed greatly to VOCs in summer.

关键词

VOCs分布特征/不同污染等级/臭氧生成机制/夏季/PMF

Key words

characteristics of VOCs distribution/different pollution level/ozone formation mechanism/summer/PMF

引用本文复制引用

基金项目

济南市大气源清单编制项目(Z21021Z)

济南市高校20条资助项目(Z21015Z)

出版年

2024
环境化学
中国科学院生态环境研究中心

环境化学

CSTPCD北大核心
影响因子：1.049
ISSN：0254-6108
被引量2
参考文献量24
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