| 西安城北地区秋季PM_(2.5)中的矿尘颗粒污染特征 |
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| 引用本文： | 牟国桃,刘焕武,李文韬,王帆,王奕潇.西安城北地区秋季PM_(2.5)中的矿尘颗粒污染特征[J].环境监控与预警,2017,9(1):48-53. |
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| 作者姓名： | 牟国桃 刘焕武 李文韬 王帆 王奕潇 |
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| 作者单位： | 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,710002 |
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| 摘 要： | 采用单颗粒气溶胶飞行时间质谱仪(Single Particle Aerosol Mass Spectrometer,SPAMS)对西安市大气矿尘颗粒物进行连续12 d在线分析,共采集到107 425个同时含有正负质谱信息的矿尘颗粒,矿尘颗粒物占PM_(2.5)样本数的8.44%。结果表明,矿尘颗粒物的正离子碎片成分以Na~+、K~+、Al~+、Ca~+、CaO~+、Fe~+为主,同时还含有Pb~+等,负离子碎片成分以NO~-_2和NO~-_3为主,另外还含有HSO~-_4、SiO~-_3、HSiO~-_3、H(NO_3)~-_2等。在西安市大气细颗粒物中,矿尘颗粒物中贡献较大的几类(如含钙、含铁、铁氧颗粒物等)大多是老化的成分。将观测阶段采集到的矿尘颗粒纳入本地污染源谱进行来源分析,其主要来源为扬尘源、工业源、燃煤源和汽车尾气源等。
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| 关 键 词： | 单颗粒气溶胶质谱仪 矿尘颗粒 粒径和化成成分 污染特征 秋季 西安 |
| 收稿时间： | 2016/1/12 0:00:00 |
| 修稿时间： | 2016/5/17 0:00:00 |
Study on the Pollution Characteristics of Mineral Dust Particle in PM2. 5 in the North Area of Xi’an in Autumn |
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| MOU Guo tao,LIU Huan wu,LI Wen tao,WANG Fan,WANG Yi xiao.Study on the Pollution Characteristics of Mineral Dust Particle in PM2. 5 in the North Area of Xi’an in Autumn[J].Environmental Monitoring and Forewarning,2017,9(1):48-53. |
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| Authors: | MOU Guo tao LIU Huan wu LI Wen tao WANG Fan WANG Yi xiao |
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| Abstract: | On-line Single Particle Aerosol Mass Spectrometer ( SPAMS) was used to analysis the mineral dust particle in Xi’an, and the chemical composition of the mineral dust aerosol particles were detected. During twelve days of consecutive days sampling, 107 425 particles in both positive and negative spectra were detected, in which mineral dust particles accounted for 8. 44%. The re-sults showed that among these mineral dust particles, the positive composition ions were mainly Na+, K+, Al+, Ca+, CaO+, Fe+, and Pb+. The negative composition ions were mainly NO2- and NO3-, as well as HSO4-, SiO3-, HSiO3-, H( NO3 ) 2- and oth-ers. At the same time, it was observed that most of the mineral dust particles ( such as Ca-rich, Fe-rich, Fe&O-rich) were aged ingredients. The mineral dust particles collected during observation were brought into the local pollution source spectrum analy-sis , and the result showed that dust sources, industrial sources, coal source and automobile exhaust gas source were the main sources of the mineral dust aerosol particles . |
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| Keywords: | Single particle aerosol mass spectrometer( SPAMS) Mineral dust particles Size and chemical compositions Pollution characteristics Autumn Xi’an |
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