• 생태와환경
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• 제38권spc호
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• pp.67-75
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• 2005

The objectives of this study were to understand the runoff characteristics of the non-point sources originating from impervious surfaces and to assess their effect on the aquatic environment in the urban areas. The concentration of pollutants (SS, BOD, COD and T-P) except for T-N showed the highest value in runoff from road, and event mean concentration (EMC) also showed high value from road. The pollutants discharged from road showed a higher concentration in the beginning stage (0 ${\sim}$ 30%) of progressive percentage of rainfall. The contribution percentages of non-point sources by load were 44.9% for SS, 11.2% for BOD, 21.4% for COD, 11.4% for T-N and 8.1% for T-P in the total load of pollutant discharged through sewer. From our results, the road was a significant potential source that deteriorated water quality of the streams and lakes in the vicinity of the urban area during the rain period. Therefore, counter plan is required to reduce pollutant concentration on the road from non-point sources in the urban area. Also, since pollutant concentration in the beginning stage of rainfall was quite high, road cleaning seems to be one of the very useful methods to prevent inflowing of pollutants to the aquatic environment.

• 상하수도학회지
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• 제27권1호
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• pp.83-89
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• 2013

Microbiological treatment, chlorination, and ozonation are usually used for water treatment. However, there is weakness that these methods can't decompose and eliminate recalcitrant organic pollutants perfectly. It is possible to eliminate recalcitrant organic pollutants when photocatalysis of $TiO_2$ is used. In this study, the removal efficiencies of organic pollutants by using photocatalyst of $TiO_2$ in the slightly polluted golf club water hazard and a river were investigated. The amount of $TiO_2$ was divided into three categories of 1 g/L, 2 g/L and 4 g/L in order to investigate the adequate amount of $TiO_2$ and the removal efficiency. UV light was used as a light source for the reaction of photocatalyst. As a conclusion in this study, the efficiency of turbidity removal was increased in proportion to the amount of $TiO_2$ until 4 hours. After then the turbidity was gradually decreased. Finally, the optimum concentration of $TiO_2$ was 4 g/L. The efficiency of COD removal was increased in proportion to the amount of $TiO_2$ regardless of time.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.552-556
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• 2005

This study was conducted to identify the characteristics of non-point pollutants discharge in a small Rural watershed. For this purpose, the typical rural area in Gongju city was selected as a research site. Water quality and water quantity data in the stream and the precipitation of the watershed were analyzed periodically from May 1 to August 31 in 2005. Also, pollutant loads were estimated using these data. As a result, the mean concentrations of BOD, TN and TP in the stream were 3.16, 3.20, 0.236 mg/L rainy season and 0.93, 2.75, 0.058 mg/L in normal survey season respectively. The estimation of non-point pollutants discharge loads were shown that BOD was 5,154.2kg, T-N was 9,164.7kg, T-P was 308.4kg, and SS was 117,163.2kg from July to August. That means above of 90% of non-point pollutants discharge was occurred in rainy season.

• 한국대기환경학회지
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• 제9권4호
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• pp.329-339
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• 1993

Due to the global-convection currents, transboundary transport of air pollutants is widely observed in many regions of the world. This study was carried out to investigate the pattern of long-range transport of air pollutants in North East Asia, especially the impact of air pollutants originated in China and Japan on the air quality in Korea. From the meteorological data at the 850 mb surface from May 1986 through April 1987 at 54 obsevation stations in the North East Asia region, the backward and forward trajectories were calculated using interpolation method. And the contributions of pollution sources in neighbor countries to the air quality in Korea were analyzed. It was concluded that air pollution in China had a great influence on the air quality in Korea throughout the year : it could be transported to Korea just within 2 or 3 days most of the time. The trajectory analysis showed that pollution sources in Beijing. Liaoning Province, and Shandong Province, the most heavily industrialized areas in China., were the most influential for the air quality in Korea except for summer season. Durnig summer season, the air pollution in Shanhai and Japan could have moer influence on Korea. Such transboundary transport of air pollutants necessitate international cowork and cooperation in the region of North East Asia.

• 한국대기환경학회지
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• 제21권1호
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• pp.49-62
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• 2005

Lake Paldang is a main resource of drinking water for 20 million people in the greater Seoul area. Dry deposition amounts of nitrogen and sulfur were estimated for three typical days in each season over the watershed of Lake Paldang. Models- 3/CMAQ (Community Multiscale Air Quality) and MM5 (Mesoscale Model) were used to predict air quality and meteorology, respectively. Aerosols as well as gaseous pollutants were considered. Nitrogen was mainly deposited in the form of HNO, while most of sulfur was deposited in the form of SO$_2$. Contribution of secondary pollutants was the largest in fall since they were transported from the greater Seoul area. However, contribution of secondarily-formed particulate pollutants to the nitrogen deposition was the largest in winter because semi-volatile ammonium nitrate favors lower temperature. Annual deposition amounts of nitrogen and sulfur were 37% and 26% of their emission amounts, respectively, over the watershed of Lake Paldang. Higher value of the nitrogen deposition showed a more influence of pollutants emitted in the greater Seoul area.

• Environmental Analysis Health and Toxicology
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• 제21권3호
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• pp.255-266
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• 2006

Soil organic matter (OM) is well documented for its capacity to retain persistent organic pollutants (POPs) and thus is important in dictating the environmental partitioning of POPs between media such as air, water, and soil. Black carbon (BC) is a small component of OM and exhibitt a 10$\sim$100 times greater sorption capacity of POPs than humified OM. Furthermore, due to the inherent long environmental life time of BC, a result of its resistance to physical and biological degradation, POPs can continue to accumulate in BC over a long period of time. The unique properties of BC have been of particular interest over the last 30 years and have resulted in broad research being conducted into its effects of POP cycling in atmospheric, oceanographic and soil matrices. The results of such studies have proved valuable In providing new research initiatives into the role of BC in the cycling of hydrophobic organic compounds (HOCs) as well as giving further insight into the long range atmospheric transport (LRAT) potential and subsequent risk assessment criteria for persistent organic pollutants (POPs). In this report, we introduce a novel study examining the relationships between BC and OM with respect to their POP sorption capacity and discuss the role of BC in influencing the environmental regulation of organic pollutants.

• 한국분무공학회지
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• 제23권2호
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• pp.74-80
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• 2018

Emission characteristics of regulated pollutants (CO, NOx, HC and PM) and hazardous air pollutants (HAPs) from diesel heavy duty trucks equipped with EGR+pDPF and SCR for Euro 5 emission standards were investigated using a chassis dynamometer. In the case of regulated pollutants, diesel heavy duty trucks with EGR+pDPF emitted 79% less CO than those with SCR. Also, those with the SCR emitted 36% less NOx than those with the EGR+pDPF. The results of VOCs have show that alkanes emissions for heavy duty trucks with the EGR+pDPF and the SCR have been higher than alkenes, cycloalkanes and aromatics. In the case of individual VOCs, the highest of propene emissions for 11.3~16.1% occupied. For aromatics group, benzene emissions are the highest percentage for 4.4~15.5%. In the future, the results of present study will provide basic data to set up HAPs emissions inventory for mobile source.

• 한국태양에너지학회 논문집
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• 제27권1호
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• pp.63-74
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• 2007

Together with the concern about the indoor all quality as sick house syndrome, the Ministry of Environment announced "Indoor Air Quality Control Law for the Multi Purpose Facility," which made the interests to be focused in the urgent understanding of current condition and preparation of measures about the indoor air pollution. In Dec 2005, the law was revised to obligatorily notify the amount of Formaldehyde and Volatile Organic Compounds in the case of newly constructed apartments with more than 100 houses. School also have its own indoor air quality guideline, Indoor air quality in school is very important because, children who very weak to indoor pollutants reside long time in there. The purpose of this paper is to survey indoor air qualify in school by field measurement. Field measurements were performed in 11 schools which were selected from 3 major cities(Incheon, Dae-jeon, chuncheon) in korea, during July, 2004. Totally concentration of Indoor pollutants were determined in 27 classroom. Target air pollutants were TVOC, formaldehyde, dust, CO, CO2 and NO2. For the result of this investigation, Indoor air quality in classroom was very poor and it was found that some pollutants (TVOC, float bacteria) exceed the guideline.

• 대한화학회지
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• 제37권6호
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• pp.590-598
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• 1993

미국의 환경청이 지정한 129종의 priority pollutants 중 16종의 유기살충제를 대상물질로 선정하여 수질시료 중의 극미량 분석방법을 연구하였다. 분석방법으로는 기체크로마토그래프-전자포획 및 기체크로마토그래프/질량분석기-SIM(selected ion moitoring)법을 검출방법으로 정하고, 시료용액의 추출 및 농축방법으로는 용매추출법(liquid-liquid extraction)과 고체상 추출법(solid-phase extraction)을 비교 연구하였다. 각 화합물들의 회수율, 상대표준편차 및 검출한계 등을 측정하여 EPA 분석법을 대체할 수 있는지의 가능성을 조사하였다.

• 생명과학회지
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• 제21권1호
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• pp.159-164
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• 2011

미생물 세포 바이오센서는 환경오염물질의 모니터링을 위한 좋은 분석도구가 될 수 있다. 이는 리포터유전자들(예로, lux, gfp or lacZ)을 방향족 화합물이나 중금속과 같은 오염물질에 반응하는 유도 조절유전자와 결합하여 만든다. 이러한 유전자 재조합기술을 이용하여 많은 종류의 미생물 바이오센서가 개발되었으며 환경, 의학, 식품, 농업, 및 방위등 다양한 분야에서 활용되고 있다. 또한 바이오센서의 민감도와 검출범위는 조절유전자의 변형을 통해 증가시킬 수있다. 최근에는 미생물 바이오센서 세포를 고효율 검색용 세포 에레이의 칩, 광섬유 등에 고착하여 활용하고 있다. 본 논문은 특이 오염물질의 검출을 위한 유전자 재조합으로 만든 미생물 세포 바이오센서의 현황과 미래에 대해 고찰한다.