Analysis of Pollution Characteristics and Sources of VOCs in Autumn in Urban Area of Luohe City
Using the manual sampling component data of environmental VOCs at three urban points in Luohe City from November 5 to 11,2021,analysis of VOCs pollution characteristics and sources will be carried out to identify key species and pollution sources of ozone generation potential(OFP)and secondary organic aerosol generation potential(SOAFP).The results showed that the average volume fraction of TVOC in Luohe was 51×10-9 during the monitoring period,with OVOCs(36.1％)and alkanes(30.7％)contributing the majority,and the spatial variation is 3515 Factory＞Water Resources Bureau＞Health Com-mission.The average OFP was 348.8 μg/m3,the top ten species were aromatic hydrocarbons and OVOCs,and the mobile source was the highest emission source.The mean value of SOAFP was 1.8 μg/m3,among which aromatic hydrocarbon contrib-uted the most at each site,and mobile source was the main contributor.The analytical results of positive definite matrix factor model showed that mobile source(25.4％),oil and gas volatile source(18.9％),solvent use source(18.6％),industrial emission source(17.5％)and combustion source(15.1％)were the main emission sources of urban atmospheric VOCs.
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