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南京市臭氧、VOCs和PANs污染特征及变化趋势
引用本文:张璘,孟晓艳,秦玮,王晨波,杜嵩山,茅晶晶,袁琦,陈诚,杨雪.南京市臭氧、VOCs和PANs污染特征及变化趋势[J].中国环境监测,2017,33(4):68-76.
作者姓名:张璘  孟晓艳  秦玮  王晨波  杜嵩山  茅晶晶  袁琦  陈诚  杨雪
作者单位:江苏省环境监测中心, 江苏 南京 210036,中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012,江苏省环境监测中心, 江苏 南京 210036,江苏省环境监测中心, 江苏 南京 210036,江苏省环境监测中心, 江苏 南京 210036,江苏省环境监测中心, 江苏 南京 210036,江苏省苏协环境技术研究院, 江苏 南京 210036,江苏省苏协环境技术研究院, 江苏 南京 210036,江苏省苏力环境科技有限责任公司, 江苏 南京 210036
基金项目:国家环境保护公益性行业科研专项(201509002);江苏省环境监测基金课题(1307);江苏省环保科研项目(2016001)
摘    要:对2013—2016年基于国家环境空气质量监测站以及省建大气多参数站所获取的南京市O_3、NO_2、CO、VOCs、PANs观测结果进行综合评价,结果表明:2016年南京市O_3第90百分位日最大8 h平均质量浓度比2013年上升33.3%,超标天数中O_3引起的超标占比增至32.0%。南京市区大气中非甲烷总烃冬季浓度高于夏季,含氧挥发性有机物则与之相反;在5—9月,含氧挥发性有机物组分在日变化过程中出现峰值的时间先后顺序依次为醚、醛、酮类,且O_3和过氧乙酰硝酸酯(PANs)生成存在有一定的线性关系。VOCs/NOx比值表明南京市处于VOCs控制区,因此对NO_2浓度下降不敏感,植物源挥发性有机物连续3年上升,夏季大气光化学反应活性未显著下降,这些现象是城市O_3浓度维持在较高水平的重要因素。

关 键 词:臭氧  VOCs  NMHCs  OVOCs  PANs  光化学反应  敏感性
收稿时间:2017/2/27 0:00:00
修稿时间:2017/3/17 0:00:00

Characteristics and Variation Tendency of O3, VOCs and PANs Pollutant in Nanjing
ZHANG Lin,MENG Xiaoyan,QIN Wei,WANG Chenbo,DU Songshan,MAO Jingjing,YUAN Qi,CHEN Cheng and YANG Xue.Characteristics and Variation Tendency of O3, VOCs and PANs Pollutant in Nanjing[J].Environmental Monitoring in China,2017,33(4):68-76.
Authors:ZHANG Lin  MENG Xiaoyan  QIN Wei  WANG Chenbo  DU Songshan  MAO Jingjing  YUAN Qi  CHEN Cheng and YANG Xue
Institution:Jiangsu Environmental Monitoring Centre, Nanjing 210036, China,State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental monitoring Centre, Beijing 100012, China,Jiangsu Environmental Monitoring Centre, Nanjing 210036, China,Jiangsu Environmental Monitoring Centre, Nanjing 210036, China,Jiangsu Environmental Monitoring Centre, Nanjing 210036, China,Jiangsu Environmental Monitoring Centre, Nanjing 210036, China,Jiangsu Su-xie Institute of Environmental Technology, Nanjing 210036, China,Jiangsu Su-xie Institute of Environmental Technology, Nanjing 210036, China and Jiangsu Su-li Environmental Science Technology Co. Ltd, Nanjing 210036, China
Abstract:Monitoring dataof O3, NO2, CO, VOCs, PANs from 2013 to 2016 by national ambient air quality monitoring stations and provincial atmospheric multi-parameter monitoring station in Nanjing were comprehensively evaluated, the results indicated that:The 90thpercentile concentration of daily maximum 8-hour ozone average in 2016 had increased 33.3% than that in 2013, proportion of substandard caused by ozone had risen to 32.0%.The concentration of NMHCs was higher in winter than in summer,on the contrary,the concentration of OVOCs was higher in summer than in winter. The order of OVOCs concentration hourly peak was ethers, aldehydes, ketones respectively in chronological sequence,and there was a linear relationship between O3 and PANs formation. The ratio of VOCs/NOx indicated that monitoring site in Nanjing was under VOCs control, so ozone sensitivity was not so much significant when NO2 reduced, and plant VOCs had continuously increasing for recent three years, but activity of photochemical reaction had kept steady, those were important reasons which making ozone concentration still remaining at a higherlevel.
Keywords:ozone  volatile organic compounds  non-methane total hydrocarbons  oxygenated volatile organic compounds  peroxyacetyl nitrates  photochemical reaction  sensibility
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