In recent years, the atmospheric composite pollution problem characterized by PM2.5
and ozone (O3
) occurs frequently. Existing research results show that VOCs dominate the main chemical reaction process of O3
production in most urban areas, and they are also one of the important precursors of secondary organic aerosols. The prevention and control of VOCs depends on the accurate understanding of emission sources and emission characteristics, so as to achieve accurate emission reduction. This study takes Liaocheng City as an example to analyze the characteristics of anthropogenic VOCs emissions and typical industry control measures. The emission factor method for calculation, combined with the activity level data of the survey, and builds the emission list of human-derived VOCs in Liaocheng City in 2020,
including solvent used source, industry processing source, vehicle of mobile source, fossil fuel fixed combustion source, biomass buruing source, storage and transportation source, waste disposal source and cooking oil fumes. The results show that the total VOCs emission in Liaocheng City in 2020 is 28434.5 t, and the solvent source emission is the largest, which is 10551.5 t, accounting for 37.1% of the total VOCs emission. Followed by industry processing source (6504.9T) and vehicle of mobile source (6311.1 T), accounting for 22.9% and 22.2% of the total VOCs emissions, respectively. From the perspective of spatial distribution, the total VOCs emissions in Chiping district and Dongchangfu District were larger, which were 6800.1 t and 6333.4 T, respectively. From the point of view of typical industries, motor vehicles (5748.4T), wood production and adhesive use (4586.7T), rubber and plastic products industry (2849.2T) and other VOCs emissions are large, and the characteristic components of emissions are mostly aromatic hydrocarbons and oxygenic volatile organic compounds (OVOCs), and some alkenes and alkanes. It has a significant influence on the formation of O3 and secondary organic aerosol in the atmosphere. Through the analysis of enterprises in related industries, it is found that there is a great potential for emission reduction in the replacement of raw and auxiliary materials and the upgrade of terminal treatment facilities. Liaocheng city as a whole, VOCs emissions focus on areas for chiping area, dongchangfu and other county industrial park, focus on the industry for motor vehicles, timber production and adhesives, rubber and plastic products, etc., should promote the related industry as soon as possible low volatile solvent and efficient processing facilities at the end of the alternative to upgrade.