• 한국대기환경학회지
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• 제17권3호
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• pp.233-240
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• 2001

The composition of volatile organic compounds (VOCs) was anlyzed for major emission sources such as vehicle exhaust, gasoline and diesel vapor, organic solvent vapor, and butane fuel gas. Low carbon-numbered hydrocarbons were found to be the dominant components of gasoline vehicle exhaust. In gasoline evaporative vapor, the predominant constituents were found to be butane and iso-pentane regardless of ambient air temperature. In case of diesel evaporative vapor was similar to those of gasoline evaporative vapor. The composition of organic solvent vapor from painting, ink and petroleum consisted mostly or aromatic compounds such as toluene and m, p, o-xylene. The hydrocarbon fraction of butane fuel gas. which is used by portable bunner, consisted mainly of propane (34%) and butane(70%).

• 한국환경보건학회지
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• 제32권4호
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• pp.292-303
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• 2006

The Volatile Organic Compounds(VOCs) are emitted from various sources and have lots of different form. Recently human are spending the many times at indoor area and indoor air pollution is issued the important social problem. The emission sources of indoor air pollutants are very various, also indoor building materials are composed of very complex chemical compounds, these indoor building materials discharge very much VOCs and other hazardous compounds. In this study, we performed the small chamber test to investigate the VOCs emission concentration and characteristics involving five kinds of the indoor building materials(furniture material, wooden floor, wall paper, paint and tile) under different conditions of four temperature and relative humidity as account of the air flow rate(AFR), air exchange rate(AER), loading factor and air velocity respectively. As the result, It was showed that building materials are emitted the highest VOCs concentration at the beginning of experiment and furniture material is emitted the highest VOCs concentration. Most of the materials were affected by temperature, but paint and tile material were affected by humidity.

• Korean Journal of Chemical Engineering
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• 제36권6호
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• pp.975-980
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• 2019

Infrared (IR) spectroscopy is a powerful technique for observing organic molecules, as it combines sensitive vibrational excitations with a non-destructive probe. However, gaseous volatile compounds in the air are challenging to detect, as they are not easy to immobilize in a sensing device and give enough signal by themselves. In this study, we fabricated a thin nanocrystalline metal-organic framework (nMOF) film on a surface plasmon resonance (SPR) substrate to enhance the IR vibration signal of the gaseous volatile compounds captured within the nMOF pores. Specifically, we synthesized nanocrystalline HKUST-1 (nHKUST-1) particles of ca. 80 nm diameter and used a colloidal dispersion of these particles to fabricate nHKUST-1 films by a spin-coating process. After finding that benzene was readily adsorbed onto nHKUST-1, an nHKUST-1 film deposited on a plasmonic Au substrate was successfully applied to the IR detection of gaseous benzene in air using surface-enhanced IR spectroscopy.

• 한국식품조리과학회지
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• 제19권1호
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• pp.1-10
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• 2003

자소자를 무 무게에 대해 0, 0.25, 0.5, 0.75, 1.0%의 비율로 첨가하여 담근 동치미 중 자소자를 첨가하지 않은 대조구와 전보에서 가장 기호도에서 가장 좋은 평가를 받고 이화학적으로 가장 바람직한 결과를 나타낸 0.5% 첨가한 동치미의 유리당, 유리아미노산, 휘발성 유기산 및 향기성분을 알아본 결과 다음과 같다. 1. Glucose와 fructose의 함량은 발효가 진행되면서 감소하는 반면 glycerol의 경우에는 동치미 담금직후 및 적숙기에는 존재하지 않았으나 서서히 증가하여 발효 말기인 45일에 나타나는 경향이었다. 유리당 함량은 자소자를 0.5% 첨가한 경우가 자소자를 첨가하지 않은 대조구보다 약간 많았다. 2. 유리아미노산은 대조구의 경우 저장기간이 증가함에 따라 서서히 증가하였으나 0.5%의 자소자를 첨가하여 담근 동치미의 유리아미노산은 맛이 좋아지는 시기인 발효 11일까지는 다량의 아미노산을 함유하였으나 저장기간이 증가함에 따라 감소하는 경향으로 나타났다. 3. 확인된 비휘발성 유기산은 latic acid, fumaric acid, succinic acid, malic acid, tartaric acid, citric acid 였는데, 발효가 진행됨에 따라 lactic acid와 succinic acid만이 점차로 증가하였고, 나머지는 감소하였다. 4. 동치미의 향기성분은 담금 즉시에는 0%와 0.5%를 비교한 결과 두 처리구 모두 함황 화합물이 대부분을 차지하여 동치미의 주 향기성분이었는데, 발효가 진행되면서 함황 화합물의 수나 %area가 약간 감소하였고, 산류나 알코올류 등이 증가하였다 이에 반해 자소자 처리구의 경우는 산류의 큰 증가를 보이지 않았고, 또한 함황 화합물의 변화가 두드러지지 않았고, 거의 유지하는 수준이었다. 본 실험의 결과 자소자를 첨가하지 않은 대조구보다 0.5% 처리구가 유리당, 유리아미노산, 비휘발성 유기산의 함량이 다소 높게 나타나 전보에서 가장 기호도가 높게 평가된 자소자 0.5% 첨가한 것과 일치하는 결과를 보였다.

• 한국안전학회지
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• 제18권3호
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• pp.94-100
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• 2003

Gel-like compounds containing flammable solvents were prepared to use fur cleaning agents in field of innovative industries and general purposes. And experiments were conducted to improve the defects of liquified flammable solvents from the view point of safety and health hazards. Flammable solvents used in this study were several single component flammable solvents(turpentine oil, N-methyl-2-pyrrolidone(NMP), d-limonene) and multi component flammable solvent(gasoline and ethanol). For gelation of flammable solvents, commercially Known as Aerosil(equation omitted) 200 fumed silica and triethanolamine(TEA) were used as gelation agent dispersant. The analyses on properties of gel-like compounds was studied by gelation and viscosity test pH test, volatility test and differential scanning calorimetry(DSC) measurement. The experimental results indicate that gel-like compounds containing flammable solvents have pH stability, high viscosity, volatile organic compounds(VOC) control by the decrease of volatility and odor component generation, fluidity control etc. From the experimental values, it can be predicted that the safety in the working place is improved by manufacturing flammable solvents into gel-like compounds.

• 한국환경보건학회지
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• 제43권6호
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• pp.457-466
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• 2017

Objectives: This study was carried out to investigate the characteristics of volatile organic compounds (VOCs) emitted from sewerage facilities such as a sanitary sewers, outlets, and catch basins. In addition, the dominant malodorous VOCs among the compounds in this study were studied. Methods: Waste gas samples were collected at 27 points in a sanitary sewer in commercial and residental areas. The concentrations of seven volatile organic compounds, including benzene and toluene, in the samples were analyzed by gas chromatograph mass spectrophotometer (GC/MS). Odor concentrations were estimated using the concentration data of the VOCs and each compound's threshold limit value. Results: As a result, it appeared that the average concentration of total observed data for acetaldehyde was 15.98 ppb and benzene 1.87 ppb, toluene 82.31 ppb, ethyl benzene 63.12 ppb, m+p-xylene 15.66 ppb, oxylene 18.73 ppb, and styrene 4.39 ppb. VOC concentrations in the commercial area were higher than those in the residential area. VOC concentrations of waste gas emitted from sewer lines was also higher than those at the outlet and in the catch basins. It was estimated that the main malodorous VOC among the seven VOCs was acetaldehyde. Conclusions: As there is little data on VOC concentrations inside sewer facilities in Korea, these data will be helpful for estimating impact assessment of VOCs and establishing a counter-plan for the abatement of VOCs from sewer facilities in the future.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 추계학술대회 논문집
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• pp.330-331
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• 2002

급격한 도시화와 산업화는 필연적으로 화석연료의 사용량 증가를 초래하였고 적절한 제어 대책이 마련되지 않는 한 결과적으로 인구가 집중된 도시 지역에서는 각종 대기 오염물질과 함께 환경 대기중의 휘발성 유기화합물(Volatile Organic Compounds VOCs)의 농도도 직접 혹은 간접적으로 증가하고 있다. VOC는 스모그 형성의 주요 원인물질인 오존의 전구물질일 뿐만 아니라 현재개선이 되지 않고 있는 시정 장애와 관련이 있는 물질이고 최근 수치상의 대기질 개선에도 불구하고 실제 피부로 느껴지게 하는 주요 원인물질이다. (중략)

• 한국대기환경학회지
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• 제16권4호
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• pp.373-380
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• 2000

A new type of photocatalyst plasma air purification filter for decomposition of some VOCs has been developed. The photocatalyst plasma air purification filter employs the pulsed discharge plasma as an energy source of TiO2. photocatalyst instead of UV light. In closed room(2m3) test removal efficiency of some VOCs was 80∼100% in 15∼24 hours. In the initial step of phptocatalyst plasma reaction. Acetone and Nitromethane etc were detected. But they were completely oxidized to CO2 and H2O.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 1999년도 추계학술대회 논문집
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• pp.87-88
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• 1999

최근 들어 서울을 중심으로 한 수도권 지역에서는 여름철 오존주의보 발령이 빈번해지면서 광화학 반응에 의한 대기중 오존농도 상승에 많은 관심을 보이고 있다. 휘발성 유기물질 (Volatile Organic Compounds)은 광화학 반응을 통해 오존을 생성시키는 대표적인 대기오염 물질로 알려져 있으며 주로 자동차, 석유정제, 석유화학, 도장산업 등에서 배출되는 것으로 알려져 있다. 이렇나 VOC는 $NO_x$와 함께 대기중 오존농도 저감을 위한 대상물질로써 NOx 배출량 규제와 동시에 VOC 농도 및 특성 또한 면밀히 검토되어야 한다.(중략)

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2000년도 춘계학술대회 논문집
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• pp.317-318
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• 2000

오늘날 우리는 문명이 발달하고 고도로 산업화된 사회의 구성원으로써 살아나가고 있다. 그러나 우리의 삶을 영위하는 과정에서 생긴 각종 환경오염에 노출되고 있어서 이로 인하여 우리의 삶의 질이 저하되기도 한다. 여러 가지 오염물질이 대기중에 가득한 가운데서 순간순간 숨을 쉬며 살아가는 우리 인간은 호흡기나 피부를 통하여 각종 대기오염물질에 직·간접적으로 노출되고 있는 실정이다. 이중 특히, 벤젠이나 톨루엔과 같은 휘발성유기화합물(Volatile Organic Compounds : VOCs)은 실내 생활이나 작업, 야외활동, 또 여러 삶의 과정에서도 노출되고 있는 듯 하다. (중략)