Sources apportionment of anthropogenic C2～C9 non-methane hydrocarbons in the atmosphere of Guangzhou, China
广州地区大气中C2～C9非甲烷碳氢化合物的人为来源

Compositional profiles of non-methane hydrocarbon compounds (NMHCs) ranging from C2 to C9 emitted from 13 anthropogenic emission sources were characterized in the ambient air of Guangzhou in the summer and the autumn of 2002. Asource diagnosis using the CMB 8.0 model yielded the relative contributions of anthropogenic emission sources in Guangzhou to NMHCs, i.e., 29.7% from ethene chemistry industries, 24.2% from exhausts from motored vehicles, 12.1% from gas stations, 9.0% from oil refinaries, 8.3% from electronics assembly, 4.3% from paint manufacturing, 2.4% from combustion of industrial wastes, 1.9% from coking, 1.1% from printing ink processing, 0.9% from cigarette factories, and 0.7% from production of refrigerators. Source assessments for six receptor sites indicated that ethene chemistry industries and motored vehichles were the most important sources of NMHCs in the city, and non-point sources are difficult to control.