基于SOA和O3生成潜势的杭州市PM2.5和O3协同控制

2019年3月1日～2019年5月31日期间采用Syntech Spectras GC955在线气相色谱仪对杭州市大气环境中挥发性有机物（VOCs）进行了在线连续监测，分析了VOCs体积分数的组成特征、 PM_2.5和O₃协同控制的优控VOCs物种和VOCs特征污染物比值.结果表明，烷烃是VOCs体积分数中最重要的组分，贡献了62.40%. C2～C6的烷烃、苯系物、乙烯和乙炔是VOCs关键物种.烯烃和芳香烃是OFP的主要贡献组分，贡献率分别为41.35%和37.50%.芳香烃是SOA的主要贡献者，贡献率超过90%.低碳的烷烃、低碳烯烃和苯系物是OFP的关键贡献物种，控制好甲苯、间/对-二甲苯和邻-二甲苯这3种苯系物，是O₃和PM_2.5协同控制的关键.采样点大气中VOCs除了受机动车尾气的影响外，溶剂使用等工业排放的影响也较为显著.

Coordinated Control of PM2.5 and O3 in Hangzhou Based on SOA and O3 Formation Potential

A continuous observation campaign was carried out with the Syntech Spectras GC955 volatile organics online monitoring system from March 1, 2019 to May 31, 2019 in Hangzhou. The constituent features of VOCs, the preferred VOCs species, and VOCs characteristic pollutant ratios were analyzed. The results showed that alkanes were the most important component in the volume fraction of VOCs, accounting for 62.40%. C2-C6 alkanes, benzene series, ethylene, and acetylene were the key species of VOCs. Olefins and aromatics were the main contribution components of OFP, with contribution rates of 41.35% and 37.50%, respectively. Aromatics were the main contributors to SOA, with a contribution rate of more than 90%. Low carbon alkanes, low carbon olefins, and benzene series were the key contributing species of OFP. Controlling toluene, m/p-xylene, and o-xylene is the key to the coordinated control of O₃ and PM_2.5. VOCs in the atmosphere of the sampling point were not only affected by motor vehicle exhaust but were also significantly affected by industrial emissions, such as solvents.