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논문 기본 정보

자료유형
학술저널
저자정보
강인선 (칭화대학교) Jinying Xi (칭화대학교) Can Wang (톈진대학교) Hong-Ying Hu (칭화대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제33권 제2호
발행연도
2017.4
수록면
87 - 96 (10page)

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In this study, 4 gases containing typical chlorinated volatile organic compounds (VOCs) were treated by ultraviolet (UV) irradiation. The typical chlorinated VOCs are dichloromethane (DCM), trichloromethane (TCM), carbon tetrachloride (CTC) and trichloroethylene (TCE). The removal efficiency (RE) and the products of chlorinated VOCs by UV irradiation are investigated. At this time, 2 types of background gas (air and nitrogen) were used to figure out the RE by photooxidation and photolysis. The specification of UV-lamp used in this study was low-pressure mercury lamp emitting wavelength of 185~254 nm. The experimental conditions were set as initial VOC concentration of 180±10 ppm, empty bed retention time (EBRT) of 53 s, temperature of 23±2℃ and relative humidity of 65±5%. In the photolysis condition with nitrogen (N₂) as background gas, the averaged RE of the 4 types of chlorinated VOCs was about 24% higher than that with photooxidation; and the REs of VOCs except CTC were confirmed as >99%. The composition of off-gases after UV photooxidation in air was investigated and several intermediates from DCM, TCM and TCE were detected by GC/MS. Among them, phosgene which is a toxics was detected as an intermediate of TCM. In addition, the concentration of carbon dioxide (CO₂) in the off-gases was measured to calculate the mineralization rate (MR). With the photooxidation, TCE showed the highest RE (>99%) while MR was the lowest (17%); and the MR of DCM was the highest (86%). In addition, particulate matters (PM) in the off-gases was also detected and high concentrated PM<SUB>10</SUB> (21,580 μg·m<SUP>-3</SUP>) and PM<SUB>2.5</SUB> (6,346 μg·m<SUP>-3</SUP> detected in TCE off-gas. More than 99% of the chlorinated VOCs could be removed using UV254-185 nm lamp, while it is necessary to conduct further studies on the production and treatment of secondary polllutants.

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Abstract
1. 서론
2. 재료 및 방법
3. 결과 및 고찰
4. 결론
References

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