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포스터 전시회 : 규제기준에 따른 경유 중형트럭의 미량유해물질 배출특성 연구
홍희경 ( Heekyoung Hong ),정성운 ( Sungwoon Jung ),손지환 ( Jihwan Son ),이상은 ( Sangeun Lee ),문선희 ( Sunhee Moon ),성기재 ( Kijae Sung ),김정수 ( Jeongsoo Kim ),김정화 ( Jounghwa Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
As pollutants have been diversified with the acceleration and enhancement of industrial development, an interest in the criteria air contaminants including nitrogen dioxide, sulfur dioxide and dust emitted from heating and industrial facilities, and vehicles has recently been expanded to hazardous air pollutants (HAPs). Although only trace amount of HAPs are released in vehicle exhaust emissions, they have toxic, carcinogenic, bio-accumulative, persisting and diffusing characteristics, and the direct and long-term exposure to them may lead to adverse effects in humans, animals and plants. Particularly, diesel vehicles emit more pollutants if they are lager and become battered. While the number of registered medium-duty trucks is relatively low compared to the overall registered vehicles, their ratio has been steadily increasing. This study was designed to investigate the emission characteristics of unregulated pollutants (Aldehyde and VOCs) as well as regulated pollutants (CO, HC, NOx and PM) from diesel medium-duty trucks. The emission characteristics of unregulated and regulated pollutants were assessed based on regulation standards (EURO 4 and EURO 5) and intake weight (2.5 ton and 5 ton). The results show that unregulated and regulated pollutants remained almost unchanged at higher speeds but decreased at below 23.5 km/h. Reduction in unregulated and regulated pollutants was noticeable in vehicles of recent regulation standards and light intake weight. The analysis of aldehyde using UPLC showed that formaldehyde and acetaldehyde of aldehyde were most dominant. The GC/MS analysis showed that benzene, toluene, ethylbenzene and xylene of VOCs were over 80% followed by toluene, xylene, ethylbenzene and benzene. The results of present study will be contributed to set up HAPs inventory.
ICT 기반 깊이 가변형 더블팩커 장치 및 VOCs 모니터링 시스템 적용 방안
손봉호 ( Bongho Son ),박성민 ( Sungmin Park ),김대현 ( Deahyun Kim ),최희경 ( Heekyoung Choi ),전병훈 ( Byonghun Jeon ),김도현 ( Dohyeon Kim ),권주혁 ( Juhyeok Kwon ),김희만 ( Heeman Kim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2020 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2020 No.-
본 기술은 주입관정과 추출관정을 오염된 토양 심도에 맞추어 불균질하거나 세립토 내의 오염 물질을 선택적으로 제거 할 수 있고, 모니터링 결과를 IT기술과 결합한 ICT(Information and Communication Technology)기반의 시스템으로 원격 제어가 가능한 기술을 개발하고 있으며, 유류로 오염된 지중 오염물 모니터링 시스템으로 VOCs센서를 이용하고 있다. 본 기술을 적용할 실증부지의 토양 내 주요 오염물질은 주로 휘발성유기화합물(VOCs, Volatile Organic Compounds)인 석유계총탄화수소(TPH, Total Petroleum Hydrocarbon, 최대농도 9,660mg/kg)와 BTEX(Benzene, Toluene, Ethylbenzene, Xylene; xylene 최대농도 107mg/kg)로 나타났다. 개발한 ICT 기반 깊이 가변형 더블팩커는 지중에 설치하여 상부에서 자동으로 상, 중, 하로 위치를 변형할 수 있는 장치로 구성되어 있다. 본 기술은 주입부와 추출부로 토양 내 오염 심도를 결정하여 원하는 심도의 세정을 위해 조절할 수 있도록 설계하였고, 모니터링부는 VOCs센서를 적용하여 구현해 본 결과 VOCs 센서 값과 기기분석(공정시험기준) 값과의 결정계수(R2)는 Benzene 0.9998, EthylBenzene 0.9665, Xylene 0.9791, THC 0.9844로 신뢰도가 높게 나왔으며, 공정시험 기준에도 부합하는 결과가 도출되었다. 적용된 VOCs 모니터링 시스템에 저장된 데이터를 일간, 주간, 월간, 연간으로 정리하여 이슈에 대한 그래프 및 보고 자료를 작성하고, 주기적인 시료분석(인증기관 기기분석)을 통한 센서 값과 기기분석의 상관식의 신뢰도를 높여, ICT 기반의 모니터링 및 대응체계를 마련할 수 있다. 또한, 축적된 자료에 대한 데이터베이스를 구축하여 3차원 전산유체역학 시뮬레이션 모델링 데이터, 현장 모니터링 결과를 기상조건 및 공간정보와 연계한 빅데이터 분석을 통하여 VOCs의 확산경로 추적이 가능할 것으로 사료된다.
포스터 전시회 : 연료첨가제 주입 전,후 승용차의 규제물질 배출현황
정성운 ( Sungwoon Jung ),손지환 ( Jihwan Son ),홍희경 ( Heekyoung Hong ),성기재 ( Kijae Sung ),김정수 ( Jeongsoo Kim ),김정화 ( Jounghwa Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
This study was designed to investigate characterization of regulated pollutants (CO, HC, NOx and PM) emitted from 134 diesel and gasoline passenger cars based on emission standards according to fuel additives. The experiments using chassis dynamometer were conducted under NEDC and CVS-75 modes. Comparison for fuel additive management and test between Korea, USA, EU and Japan, Korea was more strict than others. For with/without fuel additives according to diesel emission standards, NOx of EURO 4 and EURO 5 showed a relatively similar tendency. In the case of PM reduction rate, EURO 5 was over 20% decreased than EURO 4. In the case of standard deviation/average ratio for gasoline vehicles, variation interval was big for LEV 23.3 ~ 58% and ULEV 31.6 ~ 56.4%. Following the imposition of stricter regulations (EURO 5 and ULEV), difference rate for standard deviation was big. Especially, in the case of diesel vehicles, difference rate for NOx 68% and PM 48% was the biggest. The results of present study will contribute to set up emission standards for Korean fuel additives.
Normal Adult Hippocampal Neurogenesis in SRG3-overexpressing Transgenic Mice
Kim, Byungwoo,Lee, Eugene,Seong, Rho H.,Chung, Heekyoung,Son, Hyeon The Korean Society for Brain and Neural Science 2010 Experimental Neurobiology Vol.19 No.1
<P>SRG3 (SWI3-related gene) is a core subunit of mouse SWI/SNF complex and is known to play a critical role in stabilizing the SWI/SNF complex by attenuating its proteasomal degradation. SWI/SNF chromatin remodeling complex is reported to act as an important endogenous regulator in the proliferation and differentiation of mammalian neural stem cells. Because limited expression of SRG3 occurs in the brain and thymus during mouse embryogenesis, it was hypothesized that the altered SRG3 expression level might affect the process of adult hippocampal neurogenesis. Due to the embryonic lethality of homozygous knockout mice, this study focuses on dissecting the effect of overexpressed SRG3 on adult hippocampal neurogenesis. The BrdU incorporation assay, immunostaing with neuronal markers for each differentiation stage, and imunoblotting analysis with intracellular molecules involved in survival in adult hippocampal neurogenesis found no alteration, suggesting that the overexpression of SRG3 protein in mature neurons had no effect on the entire process of adult hippocampal neurogenesis including proliferation, differentiation, and survival.</P>