• 유기물자원화
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• 제31권3호
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• pp.93-102
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• 2023

본 연구는 NOx, SOx를 동시 제거하는 방법에 추가로 대기 중에 존재하는 중금속 오염물질에 대해 처리가능한지를 스크러버에 산화제와 환원제를 마이크로버블 장치에 투입하여 2차 오염물질이 발생 되지 않는 친환경적인 처리방식을 연구하고자 하였다. 마이크로버블로 처리하고자 하는 대기 중 중금속 물질은 납화합물(Pb)을 선정하여 제거효율을 확인하였다. 마이크로버블을 스크러버에 연결하여 처리함으로써 NOx, SOx 뿐만 아니라 대기 중 중금속 물질 저감효과 및 비용 절감과 2차 환경오염물질이 발생 되지 않는 것을 확인하였다. 본 연구를 통하여 기존에 SCR과 같이 고비용의 처리방식이 아닌 친환경적인 방법을 적용하여 저비용으로 NOx, SOx, 중금속을 동시 제거가 가능하였으며, 산화제와 환원제 및 마이크로버블을 적절히 사용하면 경제적이고 효율적인 대기오염물질 처리가 가능하였으므로 환경방지시설의 기술 발전에 도움이 될 것으로 기대된다.

• 한국물환경학회지
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• 제39권6호
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• pp.439-450
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• 2023

The Yeongsan River, a major water resource for Jeollanam-do, that is adjacent to industrial complexes and agricultural areas, is exposed to water pollution. Therefore, it is necessary to investigate the impact of water pollution incidences and prepare response systems for river environment safety for other water resources in the future. Environmental Fluid Dynamics Code (EFDC) was applied to the mainstream of the Yeongsan River where residential, commercial, and agricultural areas are located to analyze the behavior of pollutants conducting the scenario analysis. Considering the pollutants that affected the study area, two pollutants, oil and benzene, with different physical and chemical characteristics were selected for the analysis. As a result of comparing the actual and simulated values of the water elevation, temperature, and flow rate, it was confirmed that the model adequately reproduced the hydraulic characteristics of the Yeongsan River. The oil flow dynamics showed that an increase in flow rate led to reduction in the maximum height of the slick. Notably, the behavior of the oil was predominantly influenced by the wind conditions. In the case of benzene, lower flow scenarios exhibited decreased arrival times and residence times accompanied by an elevation in the maximum concentration levels. From the results of pollutant behavior in the study area, it is feasible to utilize the section of tributary confluence for collection and the weir area for dilution. This study enhances the understanding of the pollutant's behavior with different characteristics and develops effective control systems tailored to the physicochemical attributes of pollutants.

• 대한원격탐사학회지
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• 제39권6_1호
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• pp.1353-1369
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• 2023

해상에서는 재난·재해 사고가 발생했을 시 바람 등에 의한 기상영향과 해류, 조류와 같은 해상영향에 의해 피해 규모가 달라지게 되며, 빠른 현장 파악을 통해 적합한 방제 방안을 세워 피해 규모를 최소화할 의무가 있다. 특히, 해상에 유출되는 오염물질 중 상대적으로 낮은 점도와 표면장력으로 인해 해수면에서 얇은 막으로 존재하는 오염물질은 육안으로 식별하기 어렵다. 따라서 본 연구에서는 현장에서 쉽게 활용 가능한 촬영장비를 활용하여 RGB 이미지에서 해수면의 부유성 오염물질을 탐지하는 알고리즘을 개발하고, 실 해역에서 획득된 입력자료를 활용하여 알고리즘의 성능을 평가하고자 한다. 개발된 알고리즘은 영상 강화 기법을 활용하여 오염물질과 일반 해수면의 강도값 대비를 향상시키고, 히스토그램(Histogram) 분석을 통해 배경 임계값을 찾아 오염물질 이외의 부유물질을 제거하여 최종적으로 오염물질을 분류한다. 본 연구에서는 개발된 알고리즘의 성능평가를 위해서 대체물질을 이용한 실 해역 테스트를 수행하였으며, 대부분의 부유성 해양오염물질은 탐지되었으나 파도가 강한 곳에서는 오탐지 영역이 발생하였다. 그러나 기존 알고리즘에서 단일 임계값을 사용한 탐지 방법보다 약 3배 이상의 개선된 탐지 결과를 보여준다. 본 연구개발 결과를 통해 기존 현장에서 육안으로 식별이 어려웠던 부유성 해양오염물질을 탐지함으로써 현장에서의 방제 대응 활동에 유용하게 사용될 것으로 기대된다.

• 한국산업융합학회 논문집
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• 제7권3호
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• pp.289-297
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• 2004

Emissions of volatile organic compounds and odors from various industrial processes not only pollute surrounding life environments, but also lead to the deterioration of the working environments, causing various industrial health and business problems. These pollutants are usually stimulating, irritating, malodorous and sometimes carcinogenic, Which should be reduced in the pollutants formation, stage, but the practical processes do not allow This paper describes the major sources of VOC and odors, and their sampling/analysis methods. Furthermore, various removal technologies for these pollutants are suggested, which particularly include the characteristics of the catalytic and scrubber/carbon filter combined process, and even process design technologies.

• 한국산업보건학회지
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• 제20권4호
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• pp.241-247
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• 2010

Recently, indoor air quality (IAQ) has been one of the major concerns of people. Indoor parking lots are subject to be exposed to high concentrations of air pollutants emitted from vehicles. This study was performed to investigate indoor air quality (IAQ) at indoor parking lots. Sampling sites were selected 5 indoor parking lots. Target indoor air quality parameters include a number of criteria pollutants such PM$_{10}$, CO, CO$_2$, and HCHO. In addition, a variation of IAQ according to ventilation system operating was measured at C site (underground parking lot). In general, all pollutants were maintained below indoor air quality maintenance standards. The indoor air quality at indoor parking lots was affected by the availability of the ventilation facility and their operation frequency. At the underground parking lot (C site) with ventilation system, TVOC concentration according to ventilation system operating were found to be lower operating (488.2 ${\mu}g/m^3$) than non-operating (1,401.2 ${\mu}g/m^3$).

• 한국대기환경학회지
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• 제9권1호
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• pp.51-60
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• 1993

In order to study on the cause of visibility aggravation, we have selected the days of low-visibility observed in Seoul with haziness that was below 6km from 12 to 15 LST. According to the examinations, the number of low-visibility days satisfying the criteria is 30 days in 1989, 39 days in 1990, and 35 days in 1991, respectively. The annual number of low visibility days appears to increase mainly due to an increase in emission of air pollutants and in anthropogenic water vapor in the biosphere. The relationship between visibility and air pollutants(TSP, $NO_2, SO_2, O_3$) of selected days is also studied. Air pollution concentrations of selected days are much higher than those of other days. It is observed that the cause of visibility aggravation in Seoul is mainly smog and air pollutants. In particular, the visibility reduction and high $SO_2$ concentrations at Seoul in winter are similar phenomena that occurring with London smog, while the visibility reduction and high $O_3$ concentrations at Seoul in summer are also similar to the type of Los Angeles smog.

• 한국축산시설환경학회지
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• 제4권1호
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• pp.37-45
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• 1998

There are a lot of trace gas of gaseous pollutants produced from farm animals. CO2 and CH4 are gases produced directly by the animal. NH3, N2O are produced from animal waste. Most of the effects of these gaseous pollutants on the farm animals have not been investigated in detail. CO2 emission from animal is very little. CH4 release from ruminant is also considered to be a significant factor in potential global warming. Nitrous oxide (N2O) emissions could be avoided by using organic or mineral fertilizer only as much as is needed by plant growing. This paper gives an overview about problems and solving strategies for possibilities for reduction of gaseous pollutants. The way to reduce the gaseous pollution risks from livestock systems are discussed.

• 한국대기환경학회지
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• 제15권4호
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• pp.371-383
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• 1999

This paper discusses the importance of indoor air quality based on literaure review of domestic and foreign studies. A number of international efforts to propose standards and guidelines for indoor environmental quality are also reviewed. The pattern of major studies on indoor air quality focussed on characterizaton of gaseous pollutants, particulates, and other specific pollutants during the past decades, whereas VOCs, specific carcinogen, and microbiological agents might be good target pollutants to investigate the effects of human health in recent years. Management of indoor air quality requires a different approach than that adopted for outdoor air. Adequate ventilation of the indoor environment is essential, and a balance between energy conservation and the need for good air quality is required. The ways for managing indoor air quality that will be of great importance are discussed a role of control policy for guidance on how to achieve good indoor air quality.

• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제4권2호
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• pp.103-110
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• 2000

In order to understand the wintertime intermittent characteristics of the trans-boundary air pollutant transport observed in East Asia, a numerical simulation of the long-range transport of pollutants was applied using an atmospheric transport model(STEM-II). The numerical simulation was carried out for the entire month of January 1997 and specific atmospheric aerosol (including sulfate, nitrate, and other ion compounds0 observation data were compared from four observation sites(Cheju Island, Kanghwa Island, Dazaifu, and Fukue Island). The observation data revealed that concentration peaks were intermittently observed at 3 to 4-day intervals plus the four observation sites exhibited a very similar spatial variation. The horizontal and spatial scale of the heavily polluted air masses was analyzed based on numerical results. The mechanism of the intermittent transport of air pollutants was clearly explained by a comparison of the observed data with the numerical output. It was found that the wind pattern variations associated with the synoptic scale pressure system changes play an extremely important role in the transport of pollutants in this region.

• 분석과학
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• 제9권3호
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• pp.320-324
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• 1996

The dynamic range of mass selected detector, which is very popular recently because of the simplicity and cheap price, was determined by using priority pollutants. The applied priority pollutants were four pesticides, 4,4'-DDE and 4,4'-DDD, which show the sharp peaks, and ${\alpha}$-endosulfan and ${\beta}$-endosulfan, which show the broad peaks in SIM Chromatogram. The dynamic range of the 4,4'-DDE and the 4,4'-DDD was $0.1{\sim}3000{\mu}g/ml$. The broad peaks of the ${\alpha}$-endosulfan and ${\beta}$-endosulfan resulted in $0.25{\sim}3000{\mu}g/ml$ of dynamic range.