引用本文:丁黄达,缪青,邹强,姚沈良,杨倩,霍玉玲.苏州市一次PM2.5污染过程分析及其来源解析[J].环境监控与预警,2017,9(5):57-61
DING Huang da, MIAO Qing, ZOU Qiang, YAO Shen liang, YANG Qian, HUO Yu lin.Analysis of Pollution Event and Source Apportionment of PM2.5 in Suzhou[J].Environmental Monitoring and Forewarning,2017,9(5):57-61
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苏州市一次PM2.5污染过程分析及其来源解析
丁黄达,缪青,邹强,姚沈良,杨倩,霍玉玲1,2,3
1.苏州市环境监测中心,江苏 苏州 215004;2.苏州工业园区环境监测中心站,江苏 苏州 215021;3.3.镇江市环境监测中心,江苏 镇江 212009
摘要:
利用TEOM1405F型PM2.5测量仪、MARGA水溶性离子在线分析仪和激光雷达对苏州市2016年8月24日—9月6日PM2.5、水溶性离子和气溶胶垂直分布进行了观测,结合气象数据分析了水溶性离子的变化规律及其主要来源。结果表明,观测期间PM2.5平均值为43.4 μg/m3,与 2014和2015年同期相比下降了42.9%和40.3%。总水溶性无机离子平均值为24.18 μg/m3,约占ρ(PM2.5)55.7%,其中ρ(SO2-4)、ρ(NH+4)和ρ(NO-3)分别占ρ(总离子)的46.0%、25.8%、21.0%。夜间边界层降低,大气垂直扩散条件较差,是造成ρ(PM2.5)及ρ(水溶性离子)显著升高的主要原因。ρ(NO-3)/ρ(SO2-4) 为0.056~1.939,平均值为0.432,表明固定源(燃煤源)仍然是PM2.5的主要来源;PCA方法表明苏州水溶性离子的主要来源于二次污染和燃烧源、海盐和土壤源以及地面扬尘、建筑尘。
关键词:  水溶性离子  可入肺颗粒物  垂直扩散  来源解析  苏州
DOI:
分类号:X513
文献标识码:B
基金项目:苏州市科技计划基金资助项目(SS201524)
Analysis of Pollution Event and Source Apportionment of PM2.5 in Suzhou
DING Huangda, MIAO Qing, ZOU Qiang, YAO Shenliang, YANG Qian, HUO Yulin1,2,3
1.Suzhou Environmental Monitoring Center, Suzhou, Jiangsu 215004,China;2.Suzhou Industrial Park Environmental Monitoring Station, Suzhou, Jiangsu 215021, China;3.Zhenjiang Environmental Monitoring Center,Zhenjiang, Jiangsu 212009,China
Abstract:
The characteristics of PM2.5 was analyzed by using MARGA IC Analyzer、TEOM1405F instrument and LIDAR, combining with meteorological conditions from August 24 to September 6, 2016 in Suzhou. The average concentrations of PM2.5 was 43.4μg/m3,decreased 42.9% and 40.3% compared with the same period in 2014 and 2015, which indicated that the control measures were effective. The total water soluble inorganic ions was 24.18 μg/m3,accounting for 55.7% of PM2.5, and ρ(SO2-4),ρ(NH+4) and ρ(NO-3) occupied for 46.0%,25.8%,21.0% of PM2.5, respectively. Due to boundary layer was reduced at night, the atmospheric vertical diffusion condition turned worse, the concentration of PM2.5and water soluble ionsraised significantly. The range of ρ(NO-3)/ρ(SO2-4) was 0.056~1.939 and the mean value was 0.432, which indicated that the fixed source (firecoal) was still the main source of PM2.5. Source of PM2.5 is mainly derived from secondary pollution and combustion, sea salt and soil source and ground dust, construction dust according to PCA method.
Key words:  Water–soluble ions  PM2.5  Vertical diffusion  Source apportionment  Suzhou