• 대한환경공학회지
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• 제32권4호
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• pp.393-398
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• 2010

본 연구에서는 2007년 12월 태안반도의 원유유출 사고 당시 대기중 방출된 휘발성유기화합물의 농도를 추정하고자 원유유출 모의시험 챔버를 제작하였다. 이 챔버를 이용하여 온도와 기류를 변수로 두고, 시간에 따른 총 VOCs 농도와 개별 VOCs 농도의 변화를 측정 분석 하였다. 기류가 강할수록 VOCs의 농도가 낮고 온도가 높을수록 VOCs의 농도가 높다는 것을 알 수 있었다. 또한, 총 휘발성유기화합물(TVOCs)은 원유가 유출된 직후 6일이 지나면서 초기농도 대비 90% 이상이 감소하는 것으로 나타났다.

• 한국대기환경학회지
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• 제32권3호
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• pp.305-319
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• 2016

This study was carried out to evaluate the performance of two sampling methods, i.e., adsorbent tubes and canisters, for the measurement of ambient volatile organic compounds (VOCs). A total of 24 target VOCs were selected from a list of 48 priority hazardous air pollutants (HAPs) in Korea. The two sampling methods were investigated with a wide range of performance criteria such as repeatability, linearity, and lower detection limits. In addition, mean relative errors (MRE) and mean duplicate precisions (MDP) were estimated by inter-lab comparison studies for duplicate field samples. Precisions for the two methods appeared to be well comparable with the performance criteria recommended by USEPA TO-15 and TO-17 for canister and adsorbent methods, respectively. Correlations and variations between the VOCs concentrations determined by the two methods were generally good in most cases. However, MREs and MDPs for individual VOCs appeared to be widely ranged, depending on each VOC. This implies that the two methods have its own advantages and disadvantages in determining a variety of VOCs in ambient air, and neither of which has absolute superiority. Finally, 9 of 24 VOCs were found to be difficult to determine by either methods due to their unstability in a canister, and lack of appropriate standard materials. Thus, it is suggested that development of measurement methods for such unstable VOCs is an urgent task from a viewpoint of HAPs management.

• 한국환경과학회지
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• 제17권7호
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• pp.767-774
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• 2008

This study was carried out to evaluate the characteristics of atmospheric concentrations of volatile organic compounds(VOCs) and aldehydes for near a large shipyard. Most of the painting work in marine coating is performed indoor and outdoor. Most of the VOCs are emitted to the atmosphere as the paint is applied and cures. The massive scale of a ship makes it difficult to capture the emissions from outdoor painting. The VOCs are an important health and contributors to photochemical smog. The VOCs and aldehydes samples were collected using adsorbent tube and 2,4-DNPH cartridge, and were determined by an automatic thermal desorption coupled with GC/MS and HPLC-UV analysis, respectively. A total of 16 aromatic VOCs and 12 aldehydes of environmental concern were determined. At indoor coating facilities, the most abundant compound among 16 target VOCs appeared to be m,p-xylene, being followed by o-xylene. But most of the aldehydes were extremely lower concentrations. The atmospheric concentration of VOCs, m,p-xylene concentrations were the highest and the mean value were outdoor workshop 11.323 ppb, residental area 5.134 ppb, and green area 2.137 ppb, respectively. However, the most aldehydes were extremely lower concentrations such as formaldehyde, acetaldehyde and non-detection such as iso-valeraldehyde, n-valeraldehyde and o-tolualdehyde.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 1998년도 가을 학술발표회 프로그램
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• pp.23-27
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• 1998

• 대한환경공학회지
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• 제35권12호
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• pp.906-917
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• 2013

본 연구에서는 고상 미세추출법(HS-SPME)을 적용하여 대기환경시료 중 VOCs 분석을 위한 응용성을 평가하고자 하였다. 광범위한 VOCs 검출을 위한 최적 HS-SPME 분석 조건(CAR/PDMS fiber, 30분 시료노출, 도출된 분석조건)에서 VOCs의 검출 한계 농도는 저분자량 화합물인 경우 1~3 ppbv 내외였고, BTEXs 계열 화합물들의 경우에는 0.0005 ppbv 이하의 매우 낮은 농도까지 검출 가능하였다. 다만 fiber들 간의 흡착효율 재현성 평가결과, 동일 fiber에 대하여 1~9.2% (n = 3), 서로 다른 fiber들에 대하여서는 5.9~13.5% (n = 5)의 오차를 보였다. 도출된 분석조건을 이용하여 매립지 가스 중 BTEX를 포함한 35여종의 VOCs를 성공적으로 정량분석하였다.

• 한국환경과학회지
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• 제14권6호
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• pp.543-553
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• 2005

In recent days, photochemical smog due to the rapid industry development and vehicle increasement has become a critical pollutant in the metropolitan area and the number of ozone alarm signal has increased every year. This research was performed to evaluate VOCs emission source characteristics and concentration of VOCs in Daegu. The site average concentration was observed in the following order: industrial area > commercial area > residential area. Most of the VOCs species except toluene showed variations with higher concentration during nighttime, and lower concentration during the daytime. The major VOCs of stationary emission source were BTEX(benzene, toluene, ethylbenzene. xylene) and methylene chloride, trichloroethene and styrene. Also, those of automobile exhaust were toluene and benzene. Also, the major VOCs concentration emited by the vehicle fuel was observed in the following order: gasoline > light oil > liquefied petroleum gas (L.P.G). Correlation coefficients values were estimated between major VOCs such as toluene, ethylbenzene, m,p-xylene, o-xylene. Results showed that correlation coefficient values were significant magnitude above 0.76. Also, there showed highly significant correlations among ethyl benzene, m,p-xylene, and o-xylene concentration(Pearson correlation coefficients, r=0.868-0.982). Calculated correlation coefficients among commercial area,industrial area and residential area were 0.934-0.981, they showed high correlation. There showed highly correlation between stationary emission source and industrial area, compared with commercial area and residential area. Also, calculated correlation coefficients among commercial area, industrial area, residential area and automobile exhaust were 0.732, 0.725, 0.777, respectively.

• 대한환경공학회지
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• 제28권11호
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• pp.1105-1111
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• 2006

• Asian Journal of Atmospheric Environment
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• 제6권2호
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• pp.111-117
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• 2012

To establish area specific control strategy for ambient ozone in the Seoul Metropolitan Area (SMA), the maximum ozone concentration in each local government district in the SMA were estimated by using the OZone Isopleth Plotting Package for Research (OZIPR) model. The modeling period was June 2000 and the emission inventory data used were from National Institute of Environmental Research (NIER). Except the islands of Incheon, whole Seoul and Incheon areas were volatile organic compounds (VOCs) limited, i.e., decreasing the oxides of nitrogen ($NO_X$) emission alone may increase the maximum ozone concentration upto certain point. In Gyeonggi, 12 areas were VOCs limited while 12 areas were in between VOCs limited and $NO_X$ limited, i.e., decreasing both $NO_X$ and VOCs emission may decrease the maximum ozone concentration. Majority of the estimated ozone values were lower than the measured values. The reason could be inaccuracy in emission inventories and/or transport from other areas. The same calculation was carried out for June 2004 and it was found that Seoul was still in the VOCs limited condition.

• 환경영향평가
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• 제10권2호
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• pp.135-145
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• 2001

This study was conducted to investigate the practical using of Geographic Information System(GIS) technology which are computer-based systems that are used to store and manipulate geographic information on the air pollution control and management in the macro city. For this study 130 samples were corrected by passive sampler in Seoul (25 distincts) distributed by TM-coordinate during November in 1997 to January 1998, and analysed by GC/MSD for 16 VOCs e.g., toluene, benzene and display using Arc/view GIS(version 3.2, ESRI Inc, U.S.A) for windows. The most VOCs concentration distribution in November, 1997 was higher than that of January, 1998 except benzene and 1,1,2-trichroloethan, bromobenzene. And products of the distribution of VOCs concentration display using GIS technology was effective as well as other display methods(e.g., contouring method, pie or column chart, graduated symbols), especially in mapping and symbolization capabilities for spatial pollutant status evaluation were very effective than other display methods.

• 한국산업보건학회지
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• 제23권3호
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• pp.222-228
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• 2013

Objectives: The indoor air quality of newly-built (NC) and remodeled (RC) school classrooms was assessed. The primary aim was to show correlations between volatile organic compounds (VOCs) and formaldehyde (HCHO) pollutant levels. Methods: This study investigated the indoor air concentrations of VOCs and HCHO at 26 sites of newly built and 68 sites of remodeled classrooms located in South Gyeongsang Province between 2010 and 2012. VOCs in the indoor air were determined by adsorbent tube (Tenax TA) and automatic thermal desorption coupled with GC-MS analysis. Target analytes were five VOCs: benzene, toluene, ethylbenzene, xylene, and styrene. HCHO was collected with a 2,4-DNPH cartridge and analyzed by HPLC. Conclusions: This study estimated that indoor VOCs and HCHO concentrations in the classrooms were mainly affected by interior building materials and classroom equipment. For proper indoor air quality in schools, classroom air should be improved through reduction of hazardous materials by adequate ventilation, selecting environmental friendly materials, etc.