Typical industrial sector-based volatile organic compounds source profilesand ozone formation potentials in Zhengzhou, China

Özet

Volatile organic compounds (VOCs) emitted from local industries can cause PM2.5and ozone pollution. TheVOCs source profiles of 14 industries were set up on the basis of on-site sampling in this work. The sectors weredivided into four following groups according to their largest fraction of emission component: oxygenated VOCs(OVOCs), aromatic, alkane, and halohydrocarbon emissions. The main species for OVOCs, alkane, and halo-hydrocarbon emissions were ethanol and ethyl acetate, C5–C12substances, and 1,2-dichloroethane and tri-chloromethane, respectively. In terms of aromatic emissions, complex and various species were emitted. Acomparison of the automobile and furniture manufacturing sectors with other regions indicated that some si-milarities exist in aromatic emissions. However, Zhengzhou City had a remarkably lower toluene emission thando other areas, and some special species were also detected in the locality. The ozone formation potential (OFP)profiles were also set up through the VOCs source profiles and maximum incremental reactivity (MIR) theory,which illustrated that the automobile manufacturing sector had the largest influence on ozone formation owingto increased furniture manufacturing (3.41), followed by aromatic emissions (2.94). Aromatics and OVOCs fromsimilar sources had a significant effect on the OFP values. In general, the main influential species in Zhengzhouare ethanol, 2-hexanone, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenze, m/p-xylene, o-xylene, and toluene forVOCs and ozone pollution.