• Fisheries and Aquatic Sciences
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• 제4권2호
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• pp.58-64
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• 2001

Eight chlorobenzenes (out of a total of 12 in the congener series) were measured in the sediments from 21 stations in the southeastern coastal areas of Korea. The levels of total chlorobenzene isomers varied between 2.08 and 12.45 ng/g dry weight. The highest contents of total chlorobenzenes (CBs) were found in the sediments from Pohang coast. Trichloro­benzenes (the sum of 1,3,5-, 1,2,4- and 1,2,3-trichlorobenzene) were dominant classes among four congeners, whereas tetrachlorobenzenes (the sum of 1,2,3,5-, 1,2,4,5- and 1,2,3,4-tetra­chlorobenzene) and pentachlorobenzene were low levels. The contributions of total CBs showed similar patterns for all stations with positive significant correlation within CBs species. It means that CBs contamination in the southeastern coasts of Korea came from the similar source.

• 한국대기환경학회지
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• 제14권3호
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• pp.209-218
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• 1998

Chlorobenzenes (CBs) and chlorophenols (CPs) in fly ashy discharged from several municipal solid waste incinerators (MSWI) were investigated in terms of total content and isomer distribution. The content of CBs and CPs was highest in the fly ash from S incinerator, which were 1040.7ng CB/g-fly ash and 1156.4 ng CP/g-fly ash. According to the experimental results, while all samples contained a large amount of the higher chlorinated CBs, was almost constant regardless of season. The quantities of CBs and CPs depended closely on the chemical composition of MSW. while the isomer distribution of CBs and CPs was constant throughout all the year round.

• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제10권S_3호
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• pp.107-111
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• 2001

Surface seawater was sampled from 20 stations in Youngil Bay, Korea in November 2000. The samples were analyzed for eight chlorobenzenes(CBs) out of a total of 12 in the congener series using a gas chromatography coupled to a mass spectrometer detector(GC/MSD). The total CB levels varied from 1.3 to 6.1 ng/L with a mean of 4.0 ng/L. Trichlorobenzene groups (sum of 1,3,5-, 1,2,4-, and 1,2,3-trichlorobenzene) were the predominant class among the four congener groups, while tetrachlorobenzenes(sum of 1,2,3,5-, 1,2,4,5-, and 1,2,3,4- tetrachlorobenzene) and pentachlorobenzene showed a low presence. The total CB levels exhibited similar patterns for all the stations. A significant positive correlation was observed between the individual CB compounds in the particulate samples, while the dissolved samples revealed a strong correlation between the heavier molecular weight CBs.

• 한국대기환경학회지
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• 제18권2호
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• pp.149-159
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• 2002

The objective of this study was to evaluate the formation characteristics of CBs and CPs from TCE, aliphatic compound. The experiment was carried out in a fixed reactor during 30 min under the oxidation condition at the range of temperature, 300~$700^{\circ}C$. MSWI fly ash was used as catalyst in this study. Total amount of CBs formed greater magnitude than that of CPs overall range of reaction temperature. It is proposed that the formation of CPs was caused from hydroxylation of CBs. According to increasing temperature to $600^{\circ}C$, the yield of CBs and CPs increased but significantly decreased at $700^{\circ}C$. It is suggested that decomposition rate was faster than formation rate at the high temperature. In the homologue distribution of CBs, DCBs were major products at 30$0^{\circ}C$ and the amount of higher chlorinated compound increased to $600^{\circ}C$. Because they were formed by chlorination of lower chlorinated compounds. In case of CPs, the amount of DCPs was 90% of total amounts in both thermal formation and catalytic reaction. On the other hand it was clearly observed that the chlorination rate in catalytic reaction was higher than in thermal formation with TCE only.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.267-268
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• 2001

Chlorobenzenes (CBs) are ubiquitous hydrophobic chlorinated organic compounds in the environment. These compounds are used as de-ordants, solvents and pesticides, as well as byproducts of agro- or petro-chemical related manufacturing processes, such as PCBs and pentachlorophenol, or of biodegradation of lindane (Newhook and Meek, 1994). Unlike some organochlorine (OC) compounds, including polychlorinated biphenyls (PCBs) and various pesticides, CBs are not banned from production or use in any country. (omitted)

• 분석과학
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• 제12권1호
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• pp.61-67
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• 1999

도시쓰레기 소각로의 배출가스 중 다이옥신(Dioxins, PCDDs/PCDFs), chlorobenzenes(CBs) 및 chlorophenols(CPs)를 측정 분석하고, 각 시설에 대한 다이옥신 및 전구물질의 배출 패턴을 조사하였다. 대형쓰레기 소각로의 배출가스 중 다이옥신류의 농도를 독성등가환산(Toxic Equivalent, TEQ) 농도로 평가한 결과 오염화퓨란류(Pentachlorofurans, PeCDFs), 육염화퓨란류(Hepxachlorofurans, HxCDFs) 및 칠염화퓨란류(Heptachlorofurans, HeCDFs)가 전체의 76.24%, 60.84%를 차지하는 것으로 나타났으며, chlorophenols은 2,4,6-trichlorophenol(TCP), 2,3,4,6-tetrachlorophenol(TeCP) 및 pentachlorophenol(PeCP)이, chlorobenzens은 1,2,4,5-tetrachlorobenzene(TeCB) 및 hexachlorobenzene(HxCB)의 형태로 주로 배출되는 것으로 나타났다.

• 분석과학
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• 제12권1호
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• pp.68-74
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• 1999

도시쓰레기소각로의 전기집진기(Electro Precipitator, EP) 및 선택적촉매반응장치+습식세정탑(Selective Catalytic Reactor+Wet Scrubber, SCR+WS) 전 후단 배출가스 중 배출되고 있는 PCDDs/PCDFs, chlorobenzenes, chlorophenols 및 PCB를 측정 분석하고, 각 방지시설별 PCDDs/PCDFS 및 전구물질 등의 배출량과 배출특성을 조사하였다. 본 연구 결과 전기집진기의 내부에서 염소의 치환정도가 큰 2,3,4,7,8-pentachlorinated dibenzo-p-furan(PeCDF)와 2,3,4,6,7,8-hexachlorinated dibenzo-p-furan(HxCDF) 등과 같은 퓨란류, 2,3,4,6-tetrachlorophenol(TeCP), pentachlorophenol(PeCP)의 염화페놀류, 1,2,4,5-tetrachloro benzene(TeCB), pentachlorobenzene(PeCB), hexachlorobenzene(HxCB)의 염화벤젠류 및 hexachlorinated biphenyl(HxCBP), Heptachlorinated biphenyl(HeCBP), octachlorinated biphenyl(OCBP), nonachlorinated biphenyl(NCBP) 등의 PCB 등과 같은 전구물질들이 전단에 비하여 후단에서 재합성되어 배출되는 것으로 조사되었다. 이는 전기집진기의 운전온도가 약 $300^{\circ}C$ 전후로 PCDDs/PCDFs 및 전구물질들이 합성되는 온도와 일치하기 때문인 것으로 생각되어지며, PCDDs/PCDFs 및 전구물질류 증가억제를 위해 EP의 운전온도를 저온화하는 등의 방법으로 PCDDs/PCDFs 및 전구물질 등의 배출 농도를 저감해야 할 것으로 생각된다. 그러나, SCR+WS의 내부에서는 이들 다이옥신류 및 전구물질의 농도가 감소되어 제거되었음을 알 수 있었으나, 각각의 방지시설 전 후단에서 연구가 수행되어 보다 체계적인 다이옥신 저감방안이 제시되어야 한다고 판단되어진다.