This work analyzed the pollution characteristics of volatile organic compounds(VOCs)collected from Jiexiu(JX)and Fangshan(FS).Ozone formation potential(OFP)of VOCs was quantified by the propylene equivalent concentration(PEC)method and maximum incremental reactivity(MIR)method.The fractional aerosol coefficient(FAC)method and the secondary organic aerosol potential(SOAP)method were used to calculate the secondary organic aerosol formation potential(SOAFP)of VOCs.Meanwhile,health risks of toxic VOCs were evaluated via health risk assessment method.Furthermore,combined with the entropy method and positive matrix factorization(PMF)source apportionment model,the priority control species and the priority control pollution sources of VOCs were identified.The results showed that the concentration of total volatile organic compounds(TVOCs)in Jiexiu coking area was 2.7 times higher than that of Fangshan.The VOCs in Jiexiu were characterized by a low proportion of alkanes and high proportions of aromatics and alkenes.OFP,SOAFP,and health risks in Jiexiu were 3.0,8.9,and 8.8 times higher than those of Fangshan,respectively.Reduction of alkenes and aromatics emissions will be an effective way to control secondary pollutants and health risks in Jiexiu.Coking was the main source of VOCs(32.4%),followed by gasoline exhaust(29.0%)and solvent using(16.9%)in Jiexiu.Among,coking was also the main source of benzene and ethene,which were the primary pollutants controlled in Jiexiu,contributing up to 74.1%and 98.9%,respectively.While gasoline exhaust(52.0%)and solvent using(31.3%)were the main sources of the primary controlled pollutant toluene.
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