北京奥运期间气溶胶中水溶性无机离子浓度特征及来源解析
投稿时间:2011-02-23  修订日期:2011-06-11  点此下载全文
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郭照冰 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
包春晓 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
陈天蕾 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
陈天 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
周飞 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
董琼元 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
林明月 南京信息工程大学环境科学与工程学院, 江苏南京 210044 
基金项目:江苏省自然科学基金资助项目(BK2009414);江苏省环保科研课题(201017);江苏省"六大人才高峰"资助项目;江苏省"青蓝工程"人才项目;南京信息工程大学科研项目(20080316);江苏省大学生科技创新项目(2010390/10CX006)
中文摘要:2008年7-10月在中国科学院大气物理研究所采集气溶胶样品,用离子色谱进行水溶性无机离子分析,并对其组成、质量浓度变化特征、相关性及存在形式、来源解析等方面进行研究。结果显示,整个采样期间,SO42-、NO3-和NO4+是最主要的水溶性离子,主要以(NH4)2SO4和NH4NO3形式存在;SO42-、NO3-和NO4+、Ca2+和Mg2+的相关系数都较高,具有很好的同源性。NO3-/SO42-质量浓度比值表明,奥运前,固定源(燃煤)对水溶性离子的贡献大于流动源(机动车),而奥运期间和奥运后则相反。因子分析表明,交通、燃煤、土壤、建筑尘和生物质燃烧源是采样期间北京大气污染的主要来源。
中文关键词:气溶胶  水溶性无机离子  源解析
 
Mass concentration characteristics and source apportionment of water-soluble inorganic ions in aerosol in Beijing during 2008 Beijing Olympic Games
Abstract:Aerosols are sampled at Institute of Atmospheric Physics, Chinese Academy of Sciences from July to October 2008.The mass concentrations of water-soluble inorganic ions are determined with ion chromatogram(IC).This aims to investigate the composition, characteristics of mass concentration variation, relevance and form of the main water-soluble inorganic ions and their sources.The results show that SO42-, NO3- and NO4+ are the main water-soluble inorganic ions in the aerosol samples, and they are mainly in the form of (NH4) 2SO4 and NH4NO3 in aerosol particles.The correlation coefficients between SO42-, NO3- and NO4+, Ca2+ and Mg2+ are high, showing a good homology among these ions.Mass concentration ratio of NO3-/SO42- indicates that, before 2008 Beijing Olympics, the stationary source(coal burning) is the main pollution source for water-soluble species compared to the mobile source(vehicle), which is opposite to those during the Olympics and after it.Factor analysis shows that vehicle, coal combustion, soil, building dust and biomass burning are the main sources for Beijing air pollution during the sampling period.
keywords:aerosol  water-soluble inorganic ions  source apportionment
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