兴隆大气气溶胶中水溶性无机离子分析  

Analysis on Water-soluble Inorganic Ions in the Atmospheric Aerosol of Xinglong

作　　者：李杏茹[1] 宋爱利[1] 王英锋[1] 孙颖[1] 刘子锐[2] 王跃思[2] 

机构地区：[1]首都师范大学化学系,北京100048 [2]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029

出　　处：《环境科学》2013年第1期15-20,共6页Environmental Science

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-Q02-03);北京市科技计划项目(D09040903670902)

摘　　要：2009年9月～2010年8月在兴隆大气背景站,利用Andersen分级采样器进行大气气溶胶样品的采集,并利用离子色谱分析了其中的水溶性无机离子的成分含量.结果表明,TSP、PM2.1和PM1.1中总水溶性无机盐的年平均浓度分别为(89.66±47.66)、(54.44±34.08)和(44.39±29.95)μg·m-3,其中SO42-、NO3-、Ca2+和NH4+为兴隆大气气溶胶中最主要的水溶性无机离子.PM2.1中总水溶性无机离子的年平均浓度占TSP的61%.PM1.1总水溶性无机离子的年平均浓度占TSP的50%,占PM2.1的82%.PM1.1、PM2.1和TSP中水溶性无机离子总浓度季节性变化趋势一致,夏季>秋季>春季>冬季.NH4+与SO42-的摩尔比>2,表明NH4+未被SO42-完全中和.在细粒子中NH4+和SO42-、NO3-均有较好的相关性,相关系数分别为0.96和0.87,表明NH4+可能以(NH4)2SO4和NH4NO3的形式存在.Size-segregated aerosol samples were collected using Andersen cascade sampler from Sep.2009 to Aug.2010 in Xinglong,a regional atmospheric background station.The water-soluble inorganic ions were analyzed by IC.The result showed that the annual concentrations of the total water-soluble inorganic ions were（89.66±47.66）,（54.44±34.08） and（44.39±29.95） μg·m-3 in TSP,PM2.1and PM1.1,respectively.SO42-,NO3-,Ca2＋ and NH＋4 were the dominant contributors of water-soluble inorganic ions.The total water-soluble inorganic ions in PM2.1 accounted for 61% of TSP.The total water-soluble inorganic ions in PM1.1 accounted for 50% and 82% in TSP and PM2.1,respectively.The seasonal variations of the total water-soluble inorganic ion concentration in TSP,PM2.1 and PM1.1 were the same,following the order of summerautumnspringswinter.The mean molar ratio of NH＋4 to SO42- was larger than 2,indicating that NH＋4 was not completely neutralized by SO42-.NH＋4-SO42- and NH＋4-NO3 -concentrations were strongly correlated（R2 0.96 and 0.87）,indicating that NH＋4 was mainly present as（NH4）2SO4 and NH4NO3.

关 键 词：TSP PM2 1 PM1 1 大气气溶胶 水溶性无机离子 

分 类 号：X131.1[环境科学与工程—环境科学] X513