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논문 기본 정보

자료유형
학술저널
저자정보
박태언 (영산강유역환경청) 한정웅 (한국환경공단) 박승식 (전남대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제38권 제6호
발행연도
2022.12
수록면
781 - 801 (21page)
DOI
10.5572/KOSAE.2022.38.6.781

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초록· 키워드

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In order to investigate the difference in the chemical properties of PM<SUB>2.5</SUB> at two sites (at an urban site in Gwangju and a pier site in Youngam-gun) where the concentrations of gaseous pollutants (CO, NO<SUB>x</SUB>, and SO₂) emitted during fossil fuel combustion and their diurnal cycles have a large difference, 8-hr integrated PM<SUB>2.5</SUB> samples were simultaneously collected at the two sites for one month in the late fall of 2021, and their chemical composition was analyzed. In addition, real-time observation of aerosol light absorption was conducted using a 7-wavelength aethalometer to evaluate the effect of organic aerosols emitted from the operation of large ships at the pier site on the light absorption of atmospheric aerosol particles. The concentrations of NO, NO₂, CO, and SO₂ measured at the urban site were much higher than those at the pier site, however, the concentrations of PM<SUB>2.5</SUB> and its carbonaceous and secondary ionic species were high at the pier. Also, the concentration of secondarily-formed O₃ was slightly higher at the pier. Despite the concentration of NO₂ was fairly low at the pier, high O₃ concentration was likely due to the effect of VOC<SUB>s</SUB> emitted during the production of ship components in the nearby Daebul industrial complex, suggesting that VOC<SUB>s</SUB>/NO<SUB>x</SUB> ratio may have played an important role in production of O₃ at the pier. Considering the good correlations between the NO₂ and NO₃<SUP>-</SUP> at the two sites, some of the measured NO₃<SUP>-</SUP> could be formed through the oxidation process of locally emitted nitrogen oxides. However, the concentration of NO₃<SUP>-</SUP> was higher at the pier site under conditions of low NO₂ concentration, strong wind speed, and low relative humidity, than at the urban site. This might be due to impact of aerosol particles transported from polluted regions of China. Diurnal cycles of both the light absorption coefficients by aerosol and brown carbon (BrC) particles at wavelength of 370 nm and the equivalent BC (eBC) concentration at the pier site were very similar to those of NO and NO₂, indicating that they were affected by similar emission sources at the pier. In case studies to investigate the effect ofparticulate matter emitted by shipping activities on the light absorption properties of aerosol particles, it was found that the temporal variations of the aerosol and BrC absorption coefficients, and eBC concentration were greatly affected by the operating time of the cargo ships and the vehicles in the pier. In summary, it was confirmed that the operation of large cargo ships in the pier emits light-absorbing BrC particles to the atmosphere, affecting the increase in light absorption of atmospheric aerosol particles.

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Abstract
1. 서론
2. 실험 방법
3. 결과 및 고찰
4. 요약 및 결론
References

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