Concentration Variations in Primary and Secondary Particulate Matter near a Major Road in Korea
| Autor: | Yong Pyo Kim, Hyoun Cher Jin, Young Soo Chang, Yongjoo Choi, Young Sung Ghim, Soo Ran Won, Chang Hee Kang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Total organic carbon
biomass burning lcsh:GE1-350 Atmospheric Science 010504 meteorology & atmospheric sciences Chemistry Environmental engineering secondary formation 010501 environmental sciences Particulates 01 natural sciences lcsh:TD1-1066 Traffic volume open burning Environmental chemistry vehicle emissions Biomass fuels fugitive dust lcsh:Environmental technology. Sanitary engineering Biomass burning Major road lcsh:Environmental sciences 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Asian Journal of Atmospheric Environment, Vol 10, Iss 1, Pp 32-41 (2016) |
| ISSN: | 2287-1160 1976-6912 |
| Popis: | Particle-phase concentrations were measured at 10, 80, and 200 m from the roadside of a national highway near Seoul in January and May 2008. The highway has two lanes each way, with an average hourly traffic volume of 1,070 vehicles. In January 2008, PM 10 concentrations decreased from 10 to 80 m but increased at 200 m. Black carbon (BC) decreased only slightly with distance due to the influence of biomass burning and open burning from the surrounding areas. In May 2008, the effect of secondary formation on both PM 10 and PM 2.5 was significant due to high temperatures compared with January. Because on-road emissions had little effect on secondary formation for a short time, variations in PM 10 concentrations became smaller, and PM 2.5 concentrations increased with distance. The effects of fugitive dust on PM concentrations were greater in May than in January when the mean temperature was below freezing. In the composition variations, the amounts of primary ions, organic carbon (OC), and BC were larger in January, while those of secondary ions and others were larger in PM 10 , as well as PM 2.5 in May. |
| Databáze: | OpenAIRE |
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