北京南部地区夏季末臭氧及其前体物污染特征、臭氧生成潜势及源解析  

Pollution characteristics of ozone and its precursors,ozone generation potential and source analysis in southern Beijing in late summer

作　　者：王德来 崔景文 李云凤 王亚飞[1] WANG Delai;CUI Jingwen;LI Yunfeng;WANG Yafei(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617)

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《环境科学学报》2023年第4期40-52,共13页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.21806011)。

摘　　要：近年来,我国北方臭氧(简写“O_(3)”)污染情况出现向夏季末延伸的趋势.为合理、有效地治理北京地区O_(3)污染,现于北京南部地区(大兴新城地区)设立监测点位,观测与分析2019年夏季末O_(3)及其前体物的浓度分布特征与气象条件,得出北京南部地区夏季末在温度升高、风速和湿度不宜过大条件下更加容易出现O_(3)浓度超标情况.利用特征比值法与EKMA曲线法共同判断出该地区夏季末以挥发性有机物(简写“VOCs”)控制区为主.通过对比VOCs的臭氧生成潜势(简写“OFP”),判定出前十关键物种,初步梳理出对O_(3)生成贡献的相关行业.利用PMF模型进行源解析,确定污染期与非污染期O_(3)污染的主要贡献源为机动车尾气源、植物源、溶剂使用源、生活源、工业源.In recent years,the pollution period of ozone(O_(3))in the north of China tends towards late summer.In order to reasonably and effectively control O_(3)pollution in Beijing,one monitoring site has been set up in the southern area of Beijing(Daxing New Town area).By analyzing the concentration distribution characteristics and meteorological conditions of O_(3)and its precursors in the late summer of 2019,it is concluded that the exceeding O_(3)concentration is more likely to occur in the south of Beijing at the end of summer when the temperature rises and the wind speed and humidity are not too high.Volatile organic compounds(VOCs)are the main pollutants in the late summer,determined by the characteristic ratio method and EKMA curve method.The top ten key species were determined by comparing the ozone formation potential(OFP)of VOCs.And subsequently,the related industries that generate the key species mentioned before were preliminarily sorted out.According to the source analysis of the PMF model,the main contribution sources of O_(3)pollution are vehicle exhaust gas,plant sources,solvent use sources,living sources and industrial sources in the pollution and non-pollution period.

关 键 词：大气污染 O_(3) VOCS OFP PMF模型 

分 类 号：X511[环境科学与工程—环境工程]