Variation of ionic and carbonaceous species in PM10,PM2.5,PM1 at Gosan superstation during 2007-2010
- 주제(키워드) aerosol , carbon
- 발행기관 고려대학교 대학원
- 지도교수 이미혜
- 발행년도 2012
- 학위수여년월 2012. 8
- 학위구분 석사
- 학과 일반대학원 지구환경과학과
- 세부전공 대기환경화학
- 원문페이지 115 p
- 실제URI http://www.dcollection.net/handler/korea/000000035157
- 본문언어 한국어
- 제출원본 000045718756
초록/요약
Semi continuous measurements of water-soluble ions, organic carbon (OC) and elemental carbon (EC) in PM10, PM2.5, and PM1 were performed from August 2007 to July 2010 using a Cyclone at Gosan supersite. Water-soluble ions and carbons were analyzed by Ion chromatography and IMPROVE/TOR (Thermal /Optical Reflectance) method with DRI respectively. The mean values of mass concentration for the entire period of measurement were 30.83 ± 23.70 ㎍/㎥ in PM10, 19.00 ± 13.19 ㎍/㎥ in PM2.5, 14.53 ± 11.11 ㎍/㎥ in PM1. and OC and EC concentrations were 3.0~4.5 ㎍/㎥, 1.4~1.8 ㎍/㎥ respectively. Water-soluble major ions and carbonaceous species exhibited a clear seasonal pattern with higher concentrations observed in the spring than other seasons, due to cooperative effect of seasonal meteorology and east asia out flow. EC confirmed the definition of EC1 as char-EC emitted from smoldering and EC2+EC3 as soot-EC generated from higher - temperature combustion such as motor vehicle exhaust and coal combustion. Soot-EC/Char-EC ratio shows summer maximum and spring minimum. Also the highest (EC2+EC3)/EC1 ratio was found in East Sea cluster, demonstrating a significant influence of motor vehicle emissions from South Korea and Japan and less influence from industrial regions of China. When the air mass was moved from Shanghai cluster, OP/TC, EC1/TC, SO42-/TC and NO3-/TC were higher than other cluster because of the high rate of anthropogenic activity in shanghai mega city. And the good correlation between K which is a biomass burning indicator and OP, EC1 shows in PM10. It means Biomass burning often occurs around shanghai-city and Shandong contributes to high concentration of OP, EC1. OC4 has a good correlation between Ca2+ in north china cluster which moves from northern part of china and features high wind speed. It suggests that soil attribute to OC4 concentration. OC2/TC ratio is high in summer because of characteristic of SOC
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Abstract
Contents
List of Figure
List of Table
Chapter 1. Introduction 1
Chapter 2. Measurement 4
Chapter 3. Result and Discussion 6
3.1 농도 특성 6
3.1.1 질량 및 주요이온 농도 와 결합형태 6
3.1.2 탄소성 입자 8
3.2 입경별 특성 9
3.3 계절별 특성 11
3.3.1 질량 및 이온농도 특성 11
3.3.2 탄소성분 14
3.4 역궤적 군집 분석 17
3.5 주요이온 및 탄소성분의 고농도사례 특성 20
3.6 주요 구성성분에 대한 종합적 고찰 21
Chapter 4. Conclusion 24
Reference 26
Appendix 81
