盐城市城区VOCs污染特征及来源解析

2020年4—9月通过离线采样研究了盐城市城区大气中的挥发性有机物（VOCs）浓度水平及组成特征、臭氧生成潜势、二次有机气溶胶生成潜势以及毒性效应等多效应评估和来源贡献。结果表明：盐城市城区VOCs平均体积浓度为35.09×10^-9，盐塘湖公园站点浓度最高；盐城市VOCs主要组分为含氧有机物（OVOCs）和烷烃。通过挥发性有机物多效应评估发现，关键物种为乙醛、对二乙苯、丙酮、甲苯和间/对二甲苯等。采样期间对VOCs浓度的主要贡献来源为二次生成、工业排放和交通排放。

Pollution Characteristics and Source Apportionment of VOCs in Yancheng City

From April to September 2020,off-line sampling was conducted to study the concentration level and composition characteristics of volatile organic compounds (VOCs) in the atmosphere of Yancheng urban area,as well as the potential of ozone generation,the potential of secondary organic aerosols generation and the toxic effects.The results showed that the average VOCs value in Yancheng City was 35.09×10^-9,and the VOCs concentration in Yantang Lake Park was the highest.VOCs in Yancheng were mainly divided into oxygen-containing organics (OVOCs) and alkane.The multi-effect assessment of VOCs found that the key species were acetaldehyde,p-diethylbenzene,acetone,toluene and m-p-xylene.The main sources of contribution to VOCs concentration during sampling period were secondary generation,industrial emissions and traffic emissions.