广州地区大气中C2～C9非甲烷碳氢化合物的人为来源

研究了广州地区13种人为源的C2～C9非甲烷碳氢化合物的源成分谱,及其在2002年夏季和冬季环境空气中的组成和变化规律.应用CMB 8.0受体模型对各人为源进行了源解析,得到了该地区人为源的平均浓度贡献率,分别为:乙烯化工厂29.7%,机动车24.2%,加油站12.1%,石油加工9.0%,电子加工8.3%,涂料工艺4.3%,工业垃圾焚烧2.4%,炼焦1.9%,油墨工艺1.1%,卷烟加工0.9%,制冷工艺0.7%.通过对6个受体点的源解析,结果表明乙烯化工工业点源和流动源为该地区NMHCs人为源的控制重点,面源是控制难点.

Sources apportionment of anthropogenic C2～C9 non-methane hydrocarbons in the atmosphere of Guangzhou, China

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.