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衡水夏季典型时段VOCs污染特征及O3污染过程分析
Analysis of VOCs Pollution Characteristics and O3 Pollution Process in the Typical Summer Period of Hengshui
投稿时间:2019-10-01  修订日期:2020-06-02
DOI:10.19316/j.issn.1002-6002.2020.06.12
中文关键词:  VOCs  O3生成潜势  O3污染过程  协同控制方案
英文关键词:VOCs  ozone formation potential  ozone pollution episode  cooperative emission reduction scheme
基金项目:河北省环境空气挥发性有机物时空分布特征与管控研究(19273711D);国家重点研发计划"精细化预报预警技术及示范"(2017YFC0213004)
作者单位
杜桂敏 河北省邯郸环境监测中心, 河北 邯郸 056002 
张良* 河北省环境应急与重污染天气预警中心, 河北 石家庄 050037 
王晓利 河北省环境应急与重污染天气预警中心, 河北 石家庄 050037 
朱桂艳 河北省环境应急与重污染天气预警中心, 河北 石家庄 050037 
谷天宇 河北省环境应急与重污染天气预警中心, 河北 石家庄 050037 
通讯作者:张良*  河北省环境应急与重污染天气预警中心, 河北 石家庄 050037  
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中文摘要:
      选取臭氧(O3)污染高发的7月为夏季典型月,采用自动观测设备,从前体物VOCs的浓度水平及O3生成潜势(OFP),前体物、气象因素与O3相关性等多方面研究了衡水市O3污染影响因素,并剖析了一次典型的O3污染过程,以期为衡水市夏季O3污染防治提供科学参考。研究结果表明:衡水市VOCs主要组分浓度占比为烷烃 > 烯烃 > 芳香烃 > 乙炔,主要组分对总OFP的贡献为烯烃 > 芳香烃 > 烷烃 > 乙炔;O3与前体物VOCs、NO2存在负相关性,与温度存在正相关性;相对湿度低于48%时,O3和相对湿度呈负相关性,相对湿度高于48%时,O3和相对湿度呈正相关性;气团中VOCs化学组成稳定性较低,平均VOCs最大增量反应活性(MIR)较低,为4.855gO3/gVOCs;衡水市7月2—4日重度污染过程受本地生成和区域传输叠加影响。
英文摘要:
      July was chosen as the typical summer month due to high incidence of O3 pollution.The ratio of maximum ozone formation potential(OFP)to volatile organic compounds (VOCs),the correlation between O3 and precursors and meteorological factors were analyzed,a typical ozone pollution process and the sensitivity of ozone formation control were also discussed to provide scientific basis for the prevention and control of O3 pollution in Hengshui.The results showed that the concentration of each species of VOCs was in the order of alkanes > olefins > aromatics > acetylene,contribution of each species to total OFP was in the order of olefins > aromatics > alkanes > acetylene.There was a negative correlation between O3 concentration with precursors VOCs and NO2,and a positive correlation with temperature.When the relative humidity was lower than 48%,the correlation between O3 and relative humidity was negative;when the relative humidity was higher than 48%,the correlation between O3 and relative humidity was positive.The maximum incremental reaction activity of VOCs was low,and the average MIR was 4.855 g O3/gVOCs.The heavy pollution process in July 2-4 in Hengshui was mainly affected by the superposition of local generation and regional transmission.
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