| A Study on Characteristics of VOCs in Gwangju Using Statistical Analysis |
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Se-Haeng Lee, Dae-haeng Lee, Kang-soo Park, Hyeong-myeong Song, Yoon-cheol Yang, Ki-won Lee, Young-gwan Cho, Gwang-yeob Seo |
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Gwangju Metropolitan Health & Environment Research Institute, Department of Environmental Engineering, Gwangju 61986, Korea |
| 통계분석을 이용한 광주지역 휘발성유기화합물의 특성 연구 |
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이세행, 이대행, 박강수, 송형명, 양윤철, 이기원, 조영관, 서광엽 |
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광주광역시 보건환경연구원 환경연구부 |
Correspondence:
Se-Haeng Lee, Tel: 82-62-613-7585, Fax: 82-62-613-7629,
Email: sehang@korea.kr
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| Abstract |
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This study was conducted to investigate the concentration distribution of VOCs (volatile organic compounds) and the contribution of nitric oxides and VOCs to ozone creation in Gwangju. Fifty-two types of VOCs were continually measured by the hour at sampling sites in Seoseok-dong and Geonguk-dong from May to September 2015. Paraffins took up 52.1% of the entire VOCs, followed by aromatics and olefins. The monthly concentration of VOCs was highest in June and lowest in August. As for the hourly concentrations of ozone and nitric oxides, ozone concentrations started to increase from 7 am and got to the highest point during the daytime, whereas nitric oxides showed the opposite trend from ozone by reaching the lowest level during the daytime. The photochemical ozone creation potentials (POCPs) of toluene, isopentane, m,p-xylene, isobutane and 1-butene were 16.0%, 14.2%, 12.7%, 8.3% and 7.5% respectively. These five components together accounted for 58.7% of the total POCPs, which means they are the main contributor to ozone creation.
The correlation analysis showed that PM-10 and PM-2.5 (r=0.810, p<0.01), O3 and radiation (r=0.448, p<0.01), and O3 and humidity (r=-0.563, p<0.01) were significant. The results of factor analysis showed that the VOCs were mainly affected by the emission of vehicles and the evaporation of diesel fuel. |
| Key Words:
Volatile organic compounds (VOCs), Photochemical ozone creation potentials (POCPs), Correlation analysis, Factor analysis |
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