2024年济宁市环境空气中57种臭氧前体物污染特征分析  

Analysis of Pollution Characteristics of 57 Ozone Precursors in Environmental Air of Jining City in 2024

作　　者：魏薇 包明忠 岳东雨 郭滕 逯秀明 杨连宽 WEI Wei;BAO Mingzhong;YUE Dongyu;GUO Teng;LU Xiuming;YANG Liankuan(Shandong Jining Eco-environment Monitoring Center,Jining 272100,China)

机构地区：[1]山东省济宁生态环境监测中心,山东济宁272100

出　　处：《中国资源综合利用》2024年第11期19-21,共3页China Resources Comprehensive Utilization

摘　　要：臭氧前体物是指大气环境中能参与大气光化学反应而生成臭氧的污染物,成分复杂。光化学评价监测网(Photochemical Assessment Monitoring Station,PAMS)重点监测环境空气中的57种臭氧前体物,其分子结构仅含碳原子和氢原子(碳链C_(2)~C_(12))。试验采用罐采样/气相色谱-氢火焰离子化检测器/质谱联用法监测济宁市环境空气中57种臭氧前体物浓度水平,分析臭氧前体物污染特征。结果发现,57种臭氧前体物中,烷烃体积分数最高,但烯烃臭氧生成潜势最大,贡献率的排序为烯烃>烷烃>芳香烃>炔烃,二次有机气溶胶生成潜势的排序为芳香烃>烯烃>烷烃>炔烃。丙烷主要来源于天然气燃烧,乙炔、乙烯和苯主要来源于机动车尾气排放。未来,济宁市要加强天然气燃烧源和机动车尾气源的管控,减少臭氧前体物排放量,从而削减臭氧污染,改善区域大气环境质量。Ozone precursors refer to pollutants in the atmospheric environment that can participate in atmospheric photochemical reactions to generate ozone,with complex compositions.The Photochemical Assessment Monitoring Station(PAMS)focuses on monitoring 57 ozone precursors in the ambient air,whose molecular structures only contain carbon and hydrogen atoms(carbon chains C_(2)~C_(12)).The experiment uses tank sampling/gas chromatography-hydrogen flame ionization detector/mass spectrometry to monitor the concentration levels of 57 ozone precursors in the ambient air of Jining city and analyze the pollution characteristics of ozone precursors.The results show that among the 57 ozone precursors,alkanes have the highest volume fraction,but alkenes have the greatest potential for ozone generation,and the order of contribution is alkenes>alkanes>aromatic hydrocarbons>alkynes,and the order of potential for secondary organic aerosol generation is aromatic hydrocarbons>alkenes>alkanes>alkynes.Propane mainly comes from natural gas combustion,while acetylene,ethylene,and benzene mainly come from vehicle exhaust emissions.In the future,Jining city will strengthen the control of natural gas combustion sources and motor vehicle exhaust sources,reduce the emissions of ozone precursors,thereby reducing ozone pollution and improving regional atmospheric environmental quality.

关 键 词：环境空气 臭氧前体物 污染特征 济宁市 

分 类 号：X831[环境科学与工程—环境工程]