Pollution characteristics and source analysis of VOCs in Hefei City
In order to understand the characteristics and sources of VOCs pollution in Hefei City,and explore its impact on ozone generation,volatile organic compounds and ozone monitoring data from October 2021 to September 2023 were selected to study the VOCs pollution levels and change characteristics,analyze the main components of VOCs and their contributions to ozone generation,and conduct source analysis.The results showed that:(1)The high-est ozone pollution occurred mainly from June to September,and the highest VOCs occurred mainly from November to January of the the next year.Alkane accounted for the highest proportion of VOCs,followed by oxygen-containing vol-atile organic compounds(OVOCs),halogenated hydrocarbons,olefins and aromatic hydrocarbons.The main species are acetone,acetaldehyde,ethane,propane and n-pentane.(2)OFP analysis showed that OVOCs,olefins and aromat-ic hydrocarbons contributed more,and the key species were acetaldehyde,ethylene,m-,p-xylene,hexaldehyde,tolu-ene,etc.(3)According to the source analysis of volatile organic compounds by PMF model,the main sources of VOCs in Hefei are vehicle emission sources(34.6%),combustion sources(21.8%),industrial emission sources(18.2%),sol-vent coatings(17.9%)and natural sources(7.5%).Motor vehicle source is the key to control VOCs pollution in Hefei City,at the same time we should pay more attention to combustion source and industrial emission source.
Volatile organic compoundsOzoneSource analysisPollution characteristics in Hefei City
万方数据
维普
