Characteristics of carbonaceous compositions of PM 2.5 and PM 1
- 주제(키워드) carbon , PM1 , PM2.5
- 발행기관 고려대학교 대학원
- 지도교수 이미혜
- 발행년도 2010
- 학위수여년월 2010. 8
- 학위구분 석사
- 학과 일반대학원 지구환경과학과
- 원문페이지 112 p
- 실제URI http://www.dcollection.net/handler/korea/000000022835
- 본문언어 한국어
- 제출원본 000045609304
초록/요약
Atmospheric environmental issues which affect human health and global climate have been considered significantly. An aerosol is a suspension of fine solid particles or liquid droplets in a gas. Aerosols are composed of various chemical species such as ions, organic carbon (OC) and elemental carbon (EC). Carbonaceous aerosols are proportionally large as a part of PM2.5 and PM1 than PM10. The purpose of this research is examination of characteristic of fine aerosols, especially carbonaceous aerosols, in PM2.5 and PM1 at Korea University station, Seoul. The analysis of carbon fractions (OC1, OC2, OC3, OC4, POC, EC1, EC2, EC3 ) is important to examine carbonaceous aerosols. The sample duration is from August 2007 to June 2008. The number of total samples is 289. The 146 samples for which organic carbon, elemental carbon were analyzed by TOT/TOR (Thermal Optical transmission/Reflectance method),using IMPROVED protocol method. To comparing of concentration trend between particulate matters and gas species at same dates, gas hourly data was used by Yong Doo-Dong station which is closely located at Korea University From July 2007 to June 2008, the concentration ranges of OC and EC in PM2.5 were 3.42㎍/㎥ to 23.80㎍/㎥ and 0.74㎍/㎥ to 13.36㎍/㎥, and average concentrations were 9.76㎍/㎥, 4.65 ㎍/㎥, respectively. Furthermore, the OC and EC concentration ranges in PM1 were 3.12㎍/㎥ to 23.51㎍/㎥ and 1.41㎍/㎥ to 11.45㎍/㎥. The mean value of OC and EC were 9.07㎍/㎥, 4.25㎍/㎥. Fine particulate mass is mainly composed of OC, EC, sulfate, nitrate and ammonium ions. In PM 2.5, OC and EC occupied 34% and 16% of PM2.5 mass. Moreover, OC and EC in PM1.0 constituted 40% and 19%. OC and EC are good correlations of PM mass. Especially, EC and sulfate ion of PM1 are strong correlated with PM1 mass concentration. The average OC to EC ratio values similarly showed 2.10 in PM2.5 and 2.13 in PM1. O3 gas was not well correlated with organic carbon, but CO gas showed similar pattern with elemental carbon in PM2.5.
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Contents
Abstract ⅰ
List of Figures ⅱ
List of Tables ⅴ
List of Appendix ⅵ
1 Introduction 1
2 Method 3
2.1 site and period 3
2.2 Measurements 3
3. Results & Discussions 5
3.1 PM2.5 조성 5
3.1.1탄소성분 분석 5
3.1.2 월 별 탄소 성분 분포 6
3.1.3 날짜 별 탄소성분 분포 7
3.1.4 바람의 방향에 따른 탄소성분의 농도변화 8
3.1.5 주성분 분석 9
3.2 PM1 조성 10
3.2.1 탄소성분 분석 10
3.2.2 월 별 탄소 성분 분포 11
3.2.3 날짜 별 탄소성분 분포 11
3.2.4 바람의 방향에 따른 탄소성분의 농도변화 12
3.2.5 주성분 분석 13
3.3 PM2.5 와 PM1의 성분비교 13
3.4 Case Study: 2007년 10월 미세먼지 사례 시 PM2.5와 PM1의 화학적 특성 15
4. Conclusions 17
5. References 19
