• 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 ${\mu}g/m^3$).

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2008년도 추계학술발표회 발표논문집
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• pp.107-109
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• 2008

활성탄 카트리지의 적용 및 재생을 위해 공동관리 시스템이 필요하며, 무엇보다 기존 연소시스템이 갖추어져 있는 소각로나 지역냉난방 설비에 재생시스템을 적용해야 가장 경제적이다. 활성탄 처리기술 중 농축산화 기술이 가장 경제적이며, 시화 및 반월공단과 같은 간헐적이고 소규모 형태에서는 개별적인 산화시스템 설치는 고비용이 요구된다. 기존 활성탄 흡착설비와 활성탄 카트리지 흡착설비에 의한 공동재생 시스템을 도입하게 되면 기존에 많은 부담이 되는 활성탄 교체비용을 절약할 수 있으며 공동관리에 의한 업체의 환경적인 부담을 줄일 수 있다. 활성탄 카트리지를 이용한 공동처리시스템을 지역냉난방 설비난 소각로에 도입시 재생업제 및 활성탄 카트리지 적용업체에 많은 비용절감 효과가 있다.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2008년도 추계학술발표회 발표논문집
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• pp.88-91
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• 2008

연구대상지역인 서대구/염색공단의 점오염원에서 배출되는 VOC량은 염색공단이 14,834 kg/yr로 전체 배출량의 88.0%를 차지하고 있으며 서대구공단의 점오염원에 비해 7 배이상을 배출하였다. 면오염원의 경우 코일 코팅공정, 건축 및 건물 공정의 도장시설과 금속세정공정이 속한 유기용제사용이 서대구공단과 염색공단에서 VOC 배출량의 약 97%를 차지하고 있다. 서대구/염색공단의 악취를 저감하기 위해서는 면오염원의 발생량기여도가 높은 유기용제사용의 억제와 서대구공단지역의 발생량 감소가 필요하다고 판단이 된다.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2008년도 추계학술발표회 발표논문집
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• pp.92-95
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• 2008

Head-space method를 통하여 세척제에 대한 VOCs의 배출특성에서 1가제 제품을 제외한 모든 제품에서 다양한 VOCs가 검출되었으며, 제품에 따라 다소 차이는 있지만 대부분의 생활용품에서 유해한 물질이 검출되었다. 국내 제조회사에 따라 VOCs의 종류가 유사한 것도 있지만 대부분 제조회사에 따른 배출특성의 차이가 있을 수 있다고 사료되어진다. 외국과 국내의 생활용품의 구성성분 차이와 이에 따른 배출특성 차이가 있는 것으로 사료되어진다. 따라서 소비자가 VOCs노출로부터 보다 안전한 생활용품을 선정할 수 있도록, 생활용품제조회사들이 VOCs를 최소화하는 원자재를 사용하도록 유도해야 할 것이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 A
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• pp.183-186
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• 2003

In this paper, we proposed fuzzy adaptive resonance theory(ART) combined with principle component analysis(PCA) to recognize and classify indoor environmental gases. In experiment Taguchi gas sensors(TGS) are used to detect VOCs. Using thermal modulation of operating temperature of two sensors, we extract patterns of gases from the voltage across the load resistance. We use the PCA algorithm to reduce dimension so it needs less memory and shortens calculation time. Simulation is accomplished to two directions for fuzzy ART with and without PCA.

• 환경위생공학
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• 제14권2호
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• pp.113-119
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• 1999

In this study, the incineration of MEK and toluene was studied on a Pt supported alumina catalyst at temperature range from 200 to $350^{\circ}C$. An approach based on the Mars-van Krevelen rate model was used to explain the results. The object of this study was to study the kinetic behavior of the platinum catalyst for deep oxidation. The conversions of MEK and toluene were increased as the inlet concentration was decreased and the reaction temperature was increased. The maximum deep conversion of MEK and toluene were 91.81% and 55.69% at $350^{\circ}C$, respectively. The ${\kappa}_3$ constant increases with temperature faster than the ${\kappa}_1$ constant, that is, the surface concentration of ($VOCs{\cdots}O$) is higher than that of (O) at higher temperature according to the Mars-van Krevelen mechanism. Also the activation energy of toluene was larger than MEK for toluene is aromatic compound which have stronger bonding energy.Therefore, the catalytic incineration kinetics of MEK and toluene with Mars-van Krevelen mechanism could be used as the basic data for industrial processes.

• 한국환경과학회지
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• 제7권3호
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• pp.383-392
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• 1998

Pollution characteristics of leachate and underground soul of the two landfill states were Investigated Domestic wastes were dumped In the two adjacent landfill states. Only small portion of S landifill site was filled with domestic wastes at the first stage of dumping, and most portion of the site was filled with construction wastes. However Y landfill strate was filed with mostly domestic wastes. Higher concentrations of organic pollutants including VOCs were measured In Y landfill site leachate than In S tendon site. Underground souls of the two linam states were analyzed by the two kinds of leaching methods, KEP (Korean Extraction Processl and Acid Digestion. Underground souls of the both landfill states were not polluted by leachates. Underground soils of the two were composed of firie salty material. Thus It Is fecund that fine silty soul layer of the sea shore may be used as a landfillsite.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2005년도 봄 학술발표회지 제14권(제1호)
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• pp.279-280
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• 2005

TiO$_{2}$ 와 TiO-N 박막의 결정성은 전부 아나타제이고, 박막표현 거칠기는 방전전압이 높은 TiO-N 박막의 TiO$_{2}$ 박막보다 크다. 또한 박막의 광흡수스펙트럼을 측정한 결과 아주 약간의 red-shift를 보였고 이는 가시광영역에서도 광촉매 활용이 가능할 것이라는 결론을 내릴 수 있었다. 향후 이러한 박막 특성을 바탕으로 실제 염료 또는 VOCs 물질을 제거하는 적용성 테스트를 통해 광촉매 실용화에 더 나아갈 수 있을 것이라 사료되어진다.

• Journal of Korean Society for Atmospheric Environment
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• 제21권E2호
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• pp.57-65
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• 2005

An experimental study was performed on the decomposition of gaseous ammonia and two selected volatile organic compounds (VOCs: toluene and acetone) in a combined nonthermal plasma reactor with corona and glow discharges. A lab pilot scale reactor (206 liter) equipped with a high electric power pack was used to determine the decomposition efficiency in relation with the inlet concentration and applied voltage. Three different types of discharging electrode such as wired rack, wire strings for corona discharge, and thin plate for glow discharge were put in order in the reactor. While decomposition of ammonia decreased with an increase in the initial concentration, acetone showed an opposite result. In the case of toluene however no explicit tendency was found in toluene and aceton. Negative discharge resulted in high decomposition efficiency than the positive one for all gases. A better removal of gas phase element could be achieved when fume dust were present simultaneously.

• 환경위생공학
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• 제13권1호
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• pp.135-146
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• 1998

In this study, we investigated to measured concentration, seasonal characteristics and load quantity of volatile organic compounds(VOCs) for 11 sites in the main stream and 8 sites in the branch stream of Kumho river, during from October 1995 to April 1997. As a results, the small amount of volatile compounds, such as dichloromethane, chloroform, toluene, benzene, trichloroethene, tetrachloroethene, p-xylene and 1,3,5-trimethyl-benzene were detected from the main stream of Kumho river. Also detected to dichloromethene, chloroform, toluene, benzene, trichloroethene, tetrachloroethene, ethylbenzene, p-xylene, 1,3,5-trimethylbebzene and 1,2,4-trimethylbenzene in the branch stream, and dichloromerhane, chloroform and toluene were detected to all site of sampling. And seasonal variation of volatile organic compounds showed higher concentration in the July 1996 as a winter season than January 1997 as a summer season in most places. Also the load quantity of volatile organic compound at Gangchang site in the last downstream of Kumho river, was in order of chloroform > dichloromethane > toluene > trichloroethene.