HYDROCARBONS AND CARBON-MONOXIDE IN THE ATMOSPHERE OF MEXICO-CITY

被引:11
作者
RIVEROS, HG
TEJEDA, J
ORTIZ, L
JULIANSANCHEZ, A
RIVEROSROSAS, H
机构
[1] INST NACL ECOL,INST MEXICANO PETR,MEXICO CITY,DF,MEXICO
[2] SERV LOA,MEXICO CITY,DF,MEXICO
[3] UNIV NACL AUTONOMA MEXICO,FAC MED,DEPT BIOQUIM,MEXICO CITY,DF,MEXICO
[4] UNIV NACL AUTONOMA MEXICO,FAC MED,DEPT BIOQUIM,INST NACL ECOL,MEXICO CITY,DF,MEXICO
来源
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION | 1995年 / 45卷 / 12期
关键词
D O I
10.1080/10473289.1995.10467429
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In Mexico City, the use and composition of fuels determine that carbon monoxide (GO) comes mostly from mobile sources, and sulfur dioxide (SO2) from fixed and mobile sources. By simultaneously measuring hydrocarbons (HC), CO, and SO2 in the atmosphere of Mexico City, the relative amounts coming from different sources can be estimated. Assuming that some HC are emitted proportionally to CO emissions, we can establish that [HC](1) = m1 . [CO], where the propertionality constant m1 corresponds to the ratio of emissions factor for HC and CO in mobile sources. Similarly for fuels containing sulfur, it can be assumed that [HC](2) = m2 . [SO2]. In this way, the total HC are [HC](total) = [HC](0) + m1 . [CO] + m2 . [SO2], where [HC](0) corresponds mainly to other sources like solvent evaporation, gas consumption, and natural emissions. In this way, it can be estimated that in Mexico City 75% of average HC comes from mobile sources, 5% from sulfur-related sources, and 19% from natural sources and solvent evaporation. Compared with the HC/CO ratio measured in the exhaust pipe of vehicles, we estimated that 70% of HC emitted from mobile sources are evaporated losses, and only 30% come through the exhaust system.
引用
收藏
页码:973 / 980
页数:8
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