引用本文:俞梁敏.昆山市夏秋季节大气PM2.5中水溶性无机阴离子的污染特征[J].环境监控与预警,2014,6(5):44-46
YU Liang min.Pollution Characteristics of Water soluble Inorganic Ion in Atmosphere PM2.5 in Kunshan in Summer and Fall[J].Environmental Monitoring and Forewarning,2014,6(5):44-46
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昆山市夏秋季节大气PM2.5中水溶性无机阴离子的污染特征
俞梁敏1,2
1.昆山市环境监测站,江苏 昆山 215316;2.苏州市环境监测中心站 江苏 苏州 215000
摘要:
对昆山市区域7个点位夏秋季的5中水溶性无机阴离子(SO4-2、NO3-、NO2-、Cl-、F-)的污染特征进行了调查,结果表明,昆山市夏季大气PM2.5中5种离子平均值排序为:ρ(SO4-2)>ρ(Cl-)>ρ(NO-3)>ρ(F-)>ρ(NO-2);秋季平均值排序为:ρ(SO2-4)>ρ(NO-3)>ρ( F-)>ρ(NO-2);秋季平均值排序为:ρ(SO2-4)>ρ(NO-3)>ρ(Cl-)>ρ( F-)>ρ(NO-2)。SO2-4、NO-3和Cl-3者的总量在PM2.5中占比20%。除F-以外各区域离子的平均值秋季比夏季要高。ρ(NO-3)/ρ(SO2-4)表明,固定污染源在昆山市大气颗粒物污染中仍然占很大比重,但大部分测点的比值接近1,说明移动源也是昆山大气颗粒物的重要污染源。
关键词:  夏秋季  可入肺颗粒物  无机离子  昆山
DOI:
分类号:X832
基金项目:2012年昆山市社会发展科技基金资助项目
Pollution Characteristics of Water soluble Inorganic Ion in Atmosphere PM2.5 in Kunshan in Summer and Fall
YU Liang min1,2
1.Kunshan Environmental Monitoring Station,Kunshan,Jiangsu 215316,China;2.Suzhou Environmental Monitoring Station,Suzhou,Jiangsu 215000,China
Abstract:
The pollution levels of 5 kinds of inorganic anions (SO2-4、NO-2、NO-3、Cl- and F-) in atmospheric PM2.5 in 7 points in Kunshan were determined synchronously with ion chromatography technique. Results showed that average concentrations of 5 kinds of ions in summer atmospheric PM2.5 were in order of SO2-4> Cl-> NO-3> F-> NO-2, and the autumn average concentration order was SO2-4> NO-3 > Cl-> F-> NO-2. The amount of SO2-4、NO-3 and Cl- in PM2.5accounted for more than 20% . Besides the F- the average concentration of ions in fall was higher than in summer. The value of [NO-3]/[SO2-4showed that stationary sources in kunshan atmospheric particulate matter pollution which still accounted for a large proportion. However, most of the ratio of the measuring point is close to 1, which showed that mobile source of pollution was also a major pollution source of atmospheric particulates in kunshan.
Key words:  Summer and fall  PM2.5  Inorganicion  Kunshan