| 南京北郊冬季霾天PM2.5水溶性离子的污染特征与消光作用研究 |
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| 引用本文： | 周瑶瑶,马嫣,郑军,崔芬萍,王荔.南京北郊冬季霾天PM2.5水溶性离子的污染特征与消光作用研究[J].环境科学,2015,36(6):1926-1934. |
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| 作者姓名： | 周瑶瑶 马嫣 郑军 崔芬萍 王荔 |
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| 作者单位： | 南京信息工程大学环境科学与工程学院，南京 210044; 南京信息工程大学江苏省大气环境监测与污染控制高技术研究重点实验室，南京 210044 |
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| 基金项目： | 国家自然科学基金项目(21377059,41275142,41030962);江苏省自然科学基金项目(BK2012861) |
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| 摘 要： | 为了探讨霾天下大气细颗粒物(PM2.5)中水溶性离子的污染特征及其对大气消光的影响,在2013年1月25日至2月3日于南京北郊进行了PM2.5连续在线监测.利用颗粒物-液体转换采集系统(PILS)连续采集水溶性样品,与离子色谱联用分析了其中SO2-4、NO-3、NH+4、Cl-、Na+、K+、Mg2+和Ca2+的含量;同时采用扫描电迁移率粒径谱仪(SMPS)和空气动力学粒径谱仪(APS)测量细粒子的粒径谱分布;采用三波长光声黑碳光度计(PASS-3)实时在线测量细粒子的散射和吸收消光系数;并实时监测痕量气体浓度.结果表明,观测期间霾与非霾天PM2.5中水溶性离子的总质量浓度分别为70.3μg·m-3和22.9μg·m-3;二次吸湿性组分SO2-4、NO-3和NH+4为主要的污染离子.霾天有利于SO2和NOx向SO2-4和NO-3的转化,尤其是NOx的氧化.运用多元线性回归统计方法,建立了PM2.5干消光系数与气溶胶化学成分之间的经验公式,发现NH4NO3对南京冬季消光的贡献最大,其次为(NH4)2SO4、有机碳(OC)和元素碳(EC).两次重污染事件中,污染前体物的一次排放和二次转化的增加分别是造成离子浓度升高的主要原因.
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| 关 键 词： | PM2. 5 水溶性离子 霾 在线监测 |
| 收稿时间： | 2014/11/14 0:00:00 |
| 修稿时间： | 2015/1/16 0:00:00 |
Pollution Characteristics and Light Extinction Effects of Water-soluble Ions in PM2.5 During Winter Hazy Days at North Suburban Nanjing |
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| ZHOU Yao-yao,MA Yan,ZHENG Jun,CUI Fen-ping and WANG Li.Pollution Characteristics and Light Extinction Effects of Water-soluble Ions in PM2.5 During Winter Hazy Days at North Suburban Nanjing[J].Chinese Journal of Environmental Science,2015,36(6):1926-1934. |
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| Authors: | ZHOU Yao-yao MA Yan ZHENG Jun CUI Fen-ping and WANG Li |
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| Institution: | School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | |
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| Keywords: | PM2 5 water-soluble ions haze on-line monitoring |
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