• Title/Summary/Keyword: Volatile Organic compounds

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Risk Assessment on Exposure to Volatile Organic Compounds through Daily Life Cycle in City with Industrial Complex (산업도시의 Daily Life Cycle에서 VOCs 노출에 따른 위해도 분석연구)

  • 조정범;이병규
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2000.11a
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    • pp.283-284
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    • 2000
  • 석유화학, 비철금속공단, 조선 및 기계공단 등과 같은 대형 산업단지를 가진 울산지역의 대기오염은 타 지역에 비하여 꽤 높은 것으로 보고되고 있다. 또한 울산지역은 인구가 백만이 넘는 대형도시이고, 사람과 각종 공단 생산제품을 수송하기 위한 교통밀도도 꽤 높으므로 많은 양의 휘발성 유기화합물(Volatile Organic Compounds : VOCs)이 배출되고 있다. 흔히 VOC는 대류권 오존 농도의 전구체로서 역할을 하여 대류권 오존농도 감소를 위한 연구가 활발히 진행되고 있다. (중략)

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A Correlation Concentration of Contaminated Groundwater with Volatilization Coefficient (오염지하수 TCE 농도와 휘발계수와의 관계)

  • 이창수
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 2000.11a
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    • pp.266-269
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    • 2000
  • To understand the gaseous behaviour of volatile organic compounds in the unsaturated zone, their volatilization coefficient k$_{Lg}$ is evaluated. An experiment is conducted to examine the dependence of k$_{Lg}$ on the concentration of the dissolution, presence of unsaturated zone and depth of the unsaturated zone. The results show that the volatilization coefficient is not dependent on the concentration under the constant temperature and pressure. It is also find that k$_{Lg}$ depends on the presence of the unsaturated zone rather than its depth.depth.

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Characteristics of Volatile Organic Compounds from Newly Produced Building - Apartment House

  • Lee, Jeong-Joo;Kim, Jeong-Ho;Kim, Shin-Do
    • Proceedings of the Korean Environmental Health Society Conference
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    • 2004.06a
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    • pp.223-226
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    • 2004
  • Building materials emit high concentration volatile organic compounds(VOCs), formaldehyde(HCHO) and other hazardous air pollutants(HAPs) to indoor environment. Average value of VOCs and HCHO emission concentration were $3,770\;{\mu}g/m^3$, $430\;{\mu}g/m^3$ in newly buildings, respectively. VOCs and HCHO emission characteristic are high emission level at initial time and decreased in course of time.

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Hazardous Organic Compounds Concentration of Newly Built School Classroom and Neurobehavioral Performance of Elementary School Children (신축학교 교실 실내공기 중 유해유기물질 농도와 초등학생의 신경행동기능에 관한 연구)

  • Kwaak, Hong-Taak;SaKong, Joon
    • Hwankyungkyoyuk
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    • v.24 no.3
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    • pp.18-25
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    • 2011
  • This study was conducted to evaluate the effects of volatile organic compounds and formaldehyde of newly-built school classroom indoor air on the neurobehavioral functions of students. The elementary schools that were opened in September 2008(as of September 2008) was selected for newly-built school and the elementary school that were opened in March 2006 was selected for control group schools. The concentration of formaldehyde(HCHO), a hazardous organic compound that exists in the air of classrooms, exceeded the standard value of $108.2{\mu}g/m^3$ in newly-built schools while it was $60.8{\mu}g/m^3$ in control group schools, which is around 60% of the standard concentration. However, the concentration of the total volatile organic compounds(TVOCs) was $788.9{\mu}g/m^3$ and $756.1{\mu}g/m^3$ in newly-built schools and control group schools respectively, which are approximately two times higher than the standard concentration. In newly-built schools, the mean reaction time of additions and symbol digit, respectively 3,020ms and 2,398ms in pre-exposure were increased to 3,167ms and 2,514ms respectively in post-exposure. The difference of mean reaction time between pre and post exposure was 146.8 ms, or 4.6%, and 116.7ms, or 4.8%, respectively, showing statistically-significant increase of reaction time(p<0.05). On the contrary, the difference of reaction time of both tests were not statistically significant in the control group schools. These results showed that the neurobehavioral performance of newly-built schools students were affected by volatile organic compounds and formaldehyde of classroom indoor air.

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VOLATILE ORGANIC COMPOUNDS MEASUREMENT IN THE BOUNDARY OF WASTE TREATMENT FACILITIES

  • Yim, Bong-Been;Kim, Sun-Tae
    • Environmental Engineering Research
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    • v.12 no.2
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    • pp.46-54
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    • 2007
  • Concentrations of the principal volatile organic compounds, such as benzene, toluene, ethylbenzene, m,p,o-xylene, styrene, and chlorobenzene were measured at the solid waste treatment plants classified into four categories; municipal waste incinerator, municipal waste landfill site, industrial waste incinerator and industrial waste landfill site. The average concentration of VOCs in industrial waste treatment facilities was 33.43 ppb and was significantly higher than that measured at municipal waste treatment facilities (4.71 ppb). The average toluene concentrations measured at incinerators (13.05 ppb) were a little higher than those measured at landfill sites (11.54 ppb). The contribution of the waste treatment facilities to the concentration of benzene (0.35 ppb) and o-xylene (0.15 ppb) in the industrial area was relatively small. However, toluene measured in the industrial waste treatment facilities was the most abundant VOCs with the average concentration of 21.37 ppb. As a result of analyses of fingerprint, in cases of IISH and ILUS, a variety of compounds other than major VOCs were detected in high level. On the Pearson correlation analysis, the correlation was generally positive and some pairs of these VOCs were very strongly correlated (correlation coefficient > 0.75).

Emission Characteristics of Volatile Organic Compounds (VOCs) from a Carpet (카페트에서 방출되는 VOCs의 방출특성)

  • 신동민;김창녕;김동술
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.1
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    • pp.40-49
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    • 2003
  • This study has been conducted to identify and quantify the emissions of Volatile Organic Compounds (VOCs) from a new carpet. The carpet sample consists of polypropylene cushion and latex backing. The VOCs have been sampled on sorbent tubes and analyzed by thermal desorption unit and GC/MSD. For over 240 hours, concentration of VOCs has been measured in a small chamber made of stainless steel. With the measured data, emission factor and mass balance have been considered. The experiments have been conducted in accordance with ASTM D5116-97. The carpet has emitted a variety of VOCs, but in this study, 7 VOCs compounds have been considered: chlorobenzene, ethylbenzene, styrene, isopropylbenzene, bromobenzene, 2-chlorotoluene, and 1,2,3-trimethylbenzene. The results show that the concentrations of VOCs and the emission factors have exponentially decayed from relatively high level to low level with time. The gradients of the concentration of VOCs and emission factors are different for various components. It is found that styrene, 2-chlorotoluene are emitted more than others with higher concentrations.

Removing Volatile Organic Compound using the Waste Industrial Catalyst - The effect of pretreatment on Pt-based catalyst (폐 산업용 촉매를 이용한 휘발성유기화합물의 제거 -Pt 계 촉매의 전처리 효과-)

  • 김상채;서성규
    • Journal of Korean Society for Atmospheric Environment
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    • v.18 no.3
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    • pp.205-212
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    • 2002
  • The catalytic combustion of benzene, toluene and xylene over Pt-based catalyst was investigated in a fixed bed flow reactor system with atmospheric pressure to recycle the waste industrial catalyst for the processes of removing volatile organic compounds. According to the pretreatment condition, the properties of the waste Pt-based catalyst were characterized by XRD (X-ray diffraction) and BET (Brunauer-Emmett-Toller). In the carte of air pretreatment, 20$0^{\circ}C$ was found to be optimal, and increasing pretreatment temperature resulted in the reduction of the catalytic activity. When Pt-based catalyst pretreated at 20$0^{\circ}C$ by alto was retreated by hydrogen, the catalytic activity increased by increasing treatment temperature. In the case of HNO$_3$aqueous solution pretreatment, the catalytic activity decreased by increasing the concentration of HNO$_3$aqueous solution. The catalytic activity was seen to observe the following sequence : benzene > toluene > xylene.

Comparative Study of Volatile Organic Compound Concentrations in the Yochon Industrial Estate during Spring and Fall (여천 공업단지 봄, 가을 대기 중 휘발성 유기화합물 농도 비교 연구)

  • 김영성;송철한
    • Journal of Korean Society for Atmospheric Environment
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    • v.14 no.2
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    • pp.153-160
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    • 1998
  • The concentrations of volatile organic compounds (VOCs) in the atmosphere were measured from the Yochon Industrial Estate and compared with those from Tongkwangyang and Seoul. The first important phenomenon observed in the air of Yochon was high concentrations of alkenes and in particular, ethylene and propene. For most dominant species, their means and standard deviations were high simultaneously. Concentrations of several major aliphatic species exhibited a similar pattern of diurnal variation, however, with different species combination on each day. Concentrations of several hazardous aromatic species also exhibited a similar pattern of diurnal variation on the same day, which was different from that observed in the diurnal variation of major aliphatic species. It was interpreted that some species were intermittently released from relevant processes. It was also understood that high concentrations and variations of VOC species in Yochon were localized and not related to high average concentrations of ozone in Yochon and Tongkwangyang areas.

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Principle and Commercialization of Biofilter for Treatment of Volatile Organic Compounds (VOC 처리를 위한 Biofilter 개발 원리 및 상업화)

  • Lee E. Y.;Hwang J. W.;Kang Y. S.;Moon C. H.;Park S.
    • 한국생물공학회:학술대회논문집
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    • 2004.07a
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    • pp.85-106
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    • 2004
  • Styrene as volatile organic compounds(VOC) has come under strict regulatory control as they cause serious health and environmental problems. Biofiltration offers a number of economical and environmental advantages over conventional technologies, such as incineration, catalytic adsorption, and chemical scrubbing. In this presentation, recent progresses on the development of lab-scale biofilter for the treatment of gas-phase styrene are reviewed, The potentials of commercialization of biofilter systems are also discussed.

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