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서울 대기 중 PM<sub>2.5</sub> 내 OC와 EC로부터 SOC 추정방법의 비교 평가
유하영,김기애,김용표,정창훈,신혜정,문광주,박승명,이지이,Yoo, Ha Young,Kim, Ki Ae,Kim, Yong Pyo,Jung, Chang Hoon,Shin, Hye Jung,Moon, Kwang Ju,Park, Seung Myung,Lee, Ji Yi 한국입자에어로졸학회 2020 Particle and Aerosol Research Vol.16 No.1
The organic carbon in the ambient particulate matter (PM) is divided into primary organic carbon (POC) and secondary organic carbon (SOC) by their formation way. To regulate PM effectively, the estimation of the amount of POC and SOC separately is one of important consideration. Since SOC cannot be measured directly, previous studies have evaluated determination of SOC by the EC tracer method. The EC tracer method is a method of estimating the SOC value from calculating the POC by determining (OC/EC)pri which is the ratio of the measured values of OC and EC from the primary combustion source. In this study, three different ways were applied to OC and EC concentrations in PM<sub>2.5</sub> measured at Seoul for determining (OC/EC)pri: 1) the minimum value of OC/EC ratio during the measurement period; 2) regression analysis of OC vs. EC to select the lower 5-20% OC/EC ratio; 3) determining the OC/EC ratio which has lowest correlation coefficient value (R<sup>2</sup>) between EC and SOC which is reported as minimum R squared method (MRS). Each (OC/EC)pri ratio of three ways are 0.35, 1.22, and 1.77, respectively from the 1 hourly data. We compared the (OC/EC)pri ratio from 1hourly data with 24 hourly data and revealed that (OC/EC)pri estimated from 24 hourly data had twice larger than 1hourly data due to the low time resolution of sampling. We finally confirmed that the most appropriate value of (OC/EC)pri is that calculated by a regression analysis of 1 hourly data and estimated SOC amounts at PM<sub>2.5</sub> of the Seoul atmosphere.
PM<SUB>2.5</SUB>의 물리ㆍ화학적 특성에 관한 연구
김현재(Hyun-Jae Kim),안준영(Joon-Young Ahn),문광주(Kwang-Ju Moon),김종춘(Jong-choon Kim),김정수(Jeong-Su Kim),이민도(Min-Do Lee),이석조(Suk-Jo Lee),전하은(Ha-Eun Jeon),오준(Jun Oh),최진수(Jin-Soo Choi),박승명(Seung-Myung Park),박종성(J 한국환경관리학회 2010 環境管理學會誌 Vol.16 No.2
본 연구에서는 PM2.5 측정방법과 분석방법을 검토하였으며, 서울, 인천, 대전, 광주, 대구, 부산, 울산 7개 도시와 배경지역인 제주 고산의 PM2.5 농도, 주요성분인 이온, 탄소, 금속성분을 조사하였다. 또한 계절별로 집중관측을 통해 PM2.5 입자의 성장과 주변배출원의 영향 및 장거리 이동하는 입자의 특징을 분석하여 전국 7개 광역시의 배출원별 기여율을 추정함으로써 향후 PM2.5 관리정책의 기초자료를 얻었고 수용모델을 사용하여 주요 도시의 배출원별 기여율을 추정한 결과, 5~8개의 주요 배출원을 추정하였다.