西安南郊地区冬季PM_(2.5)质谱特征和来源解析  

Mass Spectrometric Characteristics and Source Apportionment of PM_(2.5)in Winter in the Southern Suburbs of Xi’an

作　　者：高冉冉 刘立忠[1] 刘焕武 朱轲欣 王浩飞 叶子辉 GAO Ranran;LIU Lizhong;LIU Huanwu;ZHU Kexin;WANG Haofei;YE Zihui(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Xi’an Environmental Monitoring Station,Xi’an 710119,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安市环境监测站,陕西西安710119

出　　处：《环境科学与技术》2023年第10期156-163,共8页Environmental Science & Technology

基　　金：陕西省教育厅专项科研项目(18JK0459)。

摘　　要：为研究西安南郊地区冬季细颗粒物的质谱特征和污染来源,作者使用在线单颗粒气溶胶质谱仪对西安市2020年11月-2021年2月的细颗粒物单粒子进行在线监测。利用自适应共振神经网络分类方法将监测期间获得的大气细颗粒物进行分类,结果表明,元素碳类、混合碳类、有机碳类、富钾类、左旋葡聚糖类、重金属类、富钠类、矿尘类和其他类的占比分别为29.31%、7.95%、16.35%、25.04%、12.29%、3.83%、2.05%、2.99%和0.19%。利用正交矩阵因子分解模型法得到7种污染源分别为燃煤源、工业工艺源、机动车尾气源、建筑扬尘源、生物质燃烧源、风沙扬尘源和其他源,贡献率分别为32.4%、25.9%、19.4%、7.4%、6.6%、2.7%和5.6%,结果表明燃煤源、工业工艺源及机动车尾气源是冬季大气细颗粒物的主要污染来源。西安南郊地区冬季细颗粒物污染治理应以散煤燃烧治理、工业工艺减排为主,同时加强机动车污染管控。To study the mass spectral characteristics and pollution sources of PM_(2.5)in winter in the southern suburbs of Xi’an,this study used an online single-particle aerosol mass spectrometer to conduct online monitoring of fine particulate matter single particles in Xi’an from November 2020 to February 2021.The PM_(2.5)obtained during the monitoring period was classified using an adaptive resonance neural network classification method,and the results showed that the percentag⁃es of elemental carbon,mixed carbon,organic carbon,K-rich,levoglucan,heavy metal,Na-rich,SiO3,and other were 29.31%,7.95%,16.35%,25.04%,12.29%,3.83%,2.05%,2.99%and 0.19%,respectively.Using the positive matrix factor decomposition model method,the seven sources were obtained including coal combustion source,industrial process source,motor vehicle exhaust source,construction dust source,biomass combustion source,wind and sand dust source and other sources,with the contribution rates of 32.4%,25.9%,19.4%,7.4%,6.6%,2.7%and 5.6%,respectively,which showed that coal combustion source,industrial process source and motor vehicle exhaust source are the main sources of fine partic⁃ulate matter in winter.The treatment of fine particulate matter pollution in winter in the southern suburbs of Xi’an should be based on the treatment of bulk coal combustion and industrial process emission reduction,while strengthening motor vehicle pollution control.

关 键 词：西安 细颗粒物 质谱特征 来源解析 

分 类 号：X513[环境科学与工程—环境工程]