http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
하돈우 ( Don-woo Ha ),이기순 ( Gi-soon Lee ),백종훈 ( Jonghun Baek ),최지연 ( Ji Yeon Choi ),이영재 ( Youngjea Lee ),신동석 ( Dong Seok Shin ) 한국환경기술학회 2023 한국환경기술학회지 Vol.24 No.1
With the introduction of the Total Water Pollution Load Management System(TPLMS), the water quality tendency and the contribution rate of tributaries to pollution load at Yeongbon B point, a river basin, were analyzed by using and expanding observation data for water quality management. The BOD tendency was in a no trend state, but showed a tendency to decrease as a whole. T-P was found to repeat increases and decreases. It was analyzed that the reduction effect of Total Water Pollution Load Management System(TPLMS) was small. As a result of analyzing the contribution rate of the load amount of the tributary observation point in the unit basin, it was analyzed that the contribution rates of Yeongbon B1, Yeongbon B2, and Yeongbon B3, which are owned river points, were low. Gwangjucheon, Hwangnyeong river, and Pyeongdongcheon, which are Water Quality Forecasting System observation points, were analyzed to have a high contribution rate. The result of analyzing the proportion of contribution of pollutants was analyzed that the contribution rate of T-P was higher than that of BOD. It was analyzed that the tendency of water quality in the Yeongbon B unit basin was highly related to the change in the contribution rate of tributaries. In order to manage the water quality in Yeongbon B unit basin of the future, it will be necessary to focus on Gwangjucheon and Hwangryong river. The results of study are intended to contribute to basic data for water quality management.
물리-화학적 분석기법을 통한 승용 디젤 엔진에서 윤활유가 PM 성분에 미치는 영향 분석 및 배출 특성에 관한 연구
시우성(Woosung Si),손정훈(Junghun Son),진동영(Dongyoung Jin),이영재(Youngjea Lee),김정환(Jeong-hwan Kim),명차리(Cha-Lee Myung),박심수(Simsoo Park) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The main purpose of this research is for the investigation on the impact of engine oil on particulate matters characteristics by using various physical-chemical PM analysis methods from light-duty diesel engine. Especially, combustion related PM (particulate matter) and PN (particle number) concentrations in the exhaust gases influence the degradation of both the engine oil, engine durability, and vehicle performance. Moreover, new measurement techniques are needed to analyze impact of engine oil on PM emission characteristic, composition, and morphology. In this research, various analytical instruments are applied to verify engine oil effect on particulate matter, with DPF equipped Euro 5 CRDI engine. physical and chemical analysis with SEM, EDS and XPS are accomplished to quantify the engine oil contribution on PM composition that are sampled onto various filters using specially designed PM sampling equipments.
백종훈 ( Jong-hun Baek ),심홍빈 ( Hongbin Shim ),정강영 ( Kang-young Jung ),이영재 ( Youngjea Lee ),나은혜 ( Eunhye Na ),하돈우 ( Don-woo Ha ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.2
The water quality and flow rate measured every 8 days were evaluated for Yeongsan River basin tributary, the water quality forecasting sites of the Ministry of Environment. In this study, the characteristics of water quality and factors of change according to farming activities of Jiseokcheon4, Manbongcheon, and Hampyeongcheon3, the major tributaries of the Yeongsan River basin, were investigated through load continuity curve and statistical analysis. As a result, it was analyzed that BOD was less affected by the flow rate in the correlation and factor analysis, indicating that there was little inflow of organic matter into the river due to rainfall. It was analyzed that T-P flows into the river during rainfall that affects the flow rate during the farming season, but affects the small-scale rainfall during the non-farming season, which does not significantly affect the flow rate of the river. It is believed that T-P is caused by rainfall from rivers and fresh water from rice paddies caused by farming activities. Accordingly, for water quality management, it is necessary to identify the pollutant sources generated by farming activities and manage the outflow of pollutants by farming period.