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Estimation on the Contribution of VOCs and Nitric Oxides in Creating Photochemical Ozone  

Cheong, Jang-Pyo (Department of Environmental and Civil Engineering Graduate School Kyungsung University)
You, Sook-Jin (Busan Metropolitan City Institute of Health & Environment)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.2, 2010 , pp. 209-218 More about this Journal
Abstract
The fifty six components of volatile organic compounds(VOCs) were continuously measured by the hour to see the distributions their of its concentration and the ozone creating contribution of nitric oxides and VOCs in Gamjeon Odor and VOCs Monitoring Network from April to September, 2008. Aromatics occupied 51.3% of VOCs and paraffins, alkanes and olefins came in order. The monthly concentration of VOCs in Gamjeon was high in July and low in September. As for hourly concentration of ozone and nitric oxides, ozone started to increase since 10am having the highest in the daytime, and nitric oxides had the different trend from that of ozone, showing the lowest in the daytime. The photochemical ozone creating potentials(POCPs) of toluene, propane, m/p-xylene, ethylbenzene, and 1,2,4-trimethylbenzene were 30.6%, 10.2%, 9.4%, 7.4% and 5.2% respectively. These five components occupied 62.8% of total POCPs, which means they contributed to the ozone creation mainly. Related with the ozone creating contribution, the ratio of VOCs to NOx was generally under 6 occupied 72.0%, which came under the area coexisting the limit of VOCs. Therefore it is thought that the management of emission source of VOCs is very important for the reduction of ozone.
Keywords
Volatile organic compounds(VOCs); Photochemical ozone creating potentials(POCPs);
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