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한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment v.23 no.6, 2007년, pp.675 - 688   피인용횟수: 4
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여름 및 겨울철 광주지역 대기 에어로졸 입자의 유기탄소 특성
Characteristics of Organic Carbon Species in Atmospheric Aerosol Particles at a Gwangju Area During Summer and Winter

박승식   (전남대학교 환경공학과UU0001112  ); 허재영   (전남대학교 환경공학과UU0001112  ); 조성용   (전남대학교 환경공학과UU0001112  ); 김승재   (전남대학교 환경공학과UU0001112  ); 김영준   (광주과학기술원 환경모니터링 신기술 연구센터UU0000201  );
  • 초록

    To characterize organic and elemental carbon (OC and EC), and water-soluble organic carbon (WSOC) contents, daily $PM_{2.5}$ measurements were performed in August 2006 (summer) and Jan $11{\sim}Feb$ 12 2007 (winter) at an urban site of Gwangju. Daily size-segregated aerosol samples were also collected for WSOC analysis. No clear seasonal variations in EC and WSOC concentrations were observed, while seasonal differences in OC concentration, and OC/EC and WSOC/EC ratios were shown. The WSOC/OC ratio showed higher value in summer (0.56) than in winter (0.40), reflecting the greater enhancement of secondary WSOC formation at the site in summer. Secondary WSOC concentrations estimated using EC tracer method were in the range $0.0{\sim}2.1\;{\mu}g/m^3$ (average $0.42\;{\mu}g/m^3$ ) and $0.0{\sim}1.1\;{\mu}g/m^3\;(0.24\;{\mu}g/m^3)$ , respectively, accounting for $0{\sim}51.6%$ (average 16.8%) and $0{\sim}52.5%$ (average 13.1 %) of the measured WSOC concentrations in summer and winter. Sometimes higher WSOC/OC ratio in winter than that in summer could be attributed to two reasons. One is that the stable atmospheric condition often appears in winter, and the prolonged residence time would strengthen atmospheric oxidation of volatile organic compounds. The other is that decrease of ambient temperature in winter would enhance the condensation of volatile secondary WSOC on pre-existing aerosols. In summertime, atmospheric aerosols and WSOC concentrations showed bimodal size distributions, peaking at the size ranges $0.32{\sim}0.56\;{\mu}m$ (condensation mode) and $3.2{\sim}5.6\;{\mu}m$ (coarse mode), respectively. During the wintertime, atmospheric aerosols showed a bimodal character, while WSOC concentrations showed a unimodal pattern. Size distributions of atmospheric aerosols and WSOC with a peak in the size range $0.32{\sim}0.56\;{\mu}m$ were observed for most of the measurement periods. On January 17, however, atmospheric aerosols and WOSC exhibited size distributions with modal peaks in the size range $1.0{\sim}1.8\;{\mu}m$ , suggesting that the aerosol particles collected on that day could be expected to be more aged, i.e, longer residence time, than the aerosols at other sampling periods.


  • 주제어

    Size-segregated aerosols .   $PM_{2.   5}$ .   Organic carbon .   Water soluble organic carbon (WSOC).  

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  • 이 논문을 인용한 문헌 (4)

    1. Park, Seung Shik ; Cho, Sung Yong ; Kim, Seung Jai 2010. "Chemical Characteristics of Water Soluble Components in Fine Particulate Matter at a Gwangju area" Korean chemical engineering research = 화학공학, 48(1): 20~26     
    2. Kang, Byung-Wook ; Yeon, Ik-Jun ; Cho, Byung-Yeol ; Park, Sang-Chan ; Lee, Hak-Sung ; Jeon, Jun-Min ; Na, Kwang-Sam 2011. "Filter-based Correction for Positive Sampling Artifacts in the Determination of Ambient Organic Carbon" 한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, 27(1): 63~72     
    3. Jeong, Jae-Uk ; Kim, Ja-Hyun ; Park, Seung-Shik ; Moon, Kwang-Joo ; Lee, Seok-Jo 2011. "Study on Characterization of Hydrophilic and Hydrophobic Fractions of Water-soluble Organic Carbon with a XAD Resin" 한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, 27(3): 337~346     
    4. Park, Da-Jeong ; Ahn, Joon-Young ; Shin, Hye-Jung ; Bae, Min-Suk 2014. "Characteristics of PM2.5 Carbonaceous Aerosol using PILS-TOC and GC/MS-TD in Seoul" 한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, 30(5): 461~476     

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