The ambient volatile organic compounds were continuously monitored by an online monitoring system in Xincheng district of Xuzhou City.The maximum incremental reactivity(MIR)method was used to evaluate the ozone formation potential(OFP)of each species and identify the key active species.Positive matrix factorization(PMF)receptor model was used to analyze the potential sources of volatile organic compounds.The results showed that the average volume fraction of VOCs was 22.14×10-9 from April to November in 2023.The proportion of VOCs components was alkanes＞halogenated hydrocarbons＞alkenes(containing acetylene)＞oxygenated compounds＞aromatic hydrocarbons.The calculated OFPs were 100.06 μg/m3.Alkenes(containing acetylene)were the maximum contributors to OFPs,which accounted for 40.36％.Followed by aromatic hydrocarbons,which accounted for 32.84％.C2-C4 alkenes and C7-C8 aromatic hydrocarbons were the key active species to the OFP.Five emission sources were identified using PMF model,including industrial sources(34.7％),vehicle emissions(29.9％),oil and gas volatilization(19.7％),usage of solvents(11.3％)and plant emissions(4.4％).VOCs control should focus on vehicle emission sources,solvent use sources and oil and gas volatile sources.
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