某电子信息产业区夏季VOCs污染特征分析

Analysis of VOCs pollution characteristics in an electronic information industry area in summer

为了解某电子信息产业区(以下简称“产业区”)夏季臭氧污染与挥发性有机物特征,结合数据分析臭氧污染过程与VOCs特征组分,并对VOCs进行来源分析;本次研究共检测出化合物94种,各类VOCs浓度排序烷烃﹥卤代烃﹥芳香烃﹥OVOCs﹥烯烃﹥炔烃,根据臭氧生成潜势分析,臭氧的整体浓度水平高低与VOCs的臭氧生成潜势和天气因素等都存在明显关系;选取臭氧高值时段结合氮氧化物、PM_(2.5)、VOCs分析臭氧污染过程,臭氧呈现规律的单峰变化与NO_(x)、PM_(2.5)都存在相反的变化趋势;PMF模型源解析分析结果表明臭氧高值时段主要污染是以苯系物为主的工业排放源对产业区臭氧生成贡献率最高。

In order to understand the characteristics of ozone pollution and volatile organic compounds in an electronic information industry area in summer,the ozone pollution process and the characteristic components of VOCs were analyzed combined with data,and the source of VOCs was analyzed.A total of 94 compounds were detected in this study,and the concentration order of various VOCs is alkanes>halogenated hydrocarbons>aromatic hydrocarbons>OVOCs>olefins>alkynes.According to the analysis of ozone generation potential,the overall concentration level of ozone is obviously related to the ozone generation potential of VOCs and weather factors.Select the period of high ozone value to analyze the ozone pollution process in combination with nitrogen oxides,PM_(2.5) and VOCs.Ozone shows a regular unimodal change,which is opposite to NO_(x) and PM_(2.5).The source analysis results of PMF model show that during the high ozone value period,the industrial emission source dominated by benzene homologues has the highest contribution rate to ozone generation in the industrial area.