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ICP 광원 시스템의 Ne:Xe 및 Ne:Ar 혼합가스의 전자온도 및 전자밀도 특성
최기승,이종찬,최용성,박대희 대한전기학회 2006 전기학회논문지C Vol.55 No.3(C)
- In whole world consciousness of environment maintenance have increased very quickly for the end of the 20th century. To use and disuse toxic substances have been controled at the field of industry. Also the field of lighting source belong to environmental control. And in the future the control will be strong. In radiational mechanism of fluorescence lamp mercury is the worst environmental problem and root. In the mercury free lighting source system the Xe gas lamp is one type. And the Ne:Xe and Ne:Ar mixed gas lamp improve firing voltage of Xe gas lamp. Purpose of this study is to understand ideal mixing-ratio of Ne:Xe and Ne:Ar gas by electron temperature and electron density for mercury free lamp. Before ICP was designed, basic parameters of plasma, which are electron temperature and electron density, were measured and calculated by single-Langmuir probe. Property of electron temperature and electron density were confirmed by changing ratio of Ne:Xe and Ne:Ar.
ICP 광원 시스템의 Ne:Xe 및 Ne:Ar 혼합가스의 전자온도의 전자밀도 특성
崔起承(Gi-Seung Choi),李鐘餐(Jong-Chan Lee),崔龍成(Yong-Sung Choi),朴大熙(Dae-Hee Park) 대한전기학회 2006 전기학회논문지C Vol.55 No.3
In whole world consciousness of environment maintenance have increased very quickly for the end of the 20th century. To use and disuse toxic substances have been controled at the field of industry. Also the field of lighting source belong to environmental control. And in the future the control will be strong. In radiational mechanism of fluorescence lamp mercury is the worst environmental problem and root. In the mercury free lighting source system the Xe gas lamp is one type. And the Ne:Xe and Ne:Ar mixed gas lamp improve firing voltage of Xe gas lamp. Purpose of this study is to understand ideal mixing-ratio of Ne:Xe and Ne:Ar gas by electron temperature and electron density for mercury free lamp. Before ICP was designed, basic parameters of plasma, which are electron temperature and electron density, were measured and calculated by single-Langmuir probe. Property of electron temperature and electron density were confirmed by changing ratio of Ne:Xe and Ne:Ar.
ICP 제논 램프의 가스 압력과 공급 전력에 따른 광학적 특성연구 (pp.1659-1660)
최기승(Gi-Seung Choi),이성진(Seong-Jin Lee),이종찬(Jung-Chan Lee),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
After end of the 20th environmental problem was became issue. So about mercury free lighting sources are being studied very much. In this paper, a mercury and electrode free bulb was designed. in this bulb was injected mixed of Xe, Ne and Kr Gases. and then the bulb was discharged by 13.56㎒ RF Power after spectrum, color coordinates and brightness were measured by spectrum meter CS-1000. Measured results were compared and analyzed, also analysis was able to do a characteristic of a gas defensive fight in proportion to a mixing ratio. Therefore the most of high brightness which was 4500㏅/m2 was gained in 1:1 ratio of Xe:Ne at 60W input power.
산업폐수에서 농화한 미생물컨소시엄 CDIK-3에 의한 1,4-dioxane의 생분해에 영향을 미치는 물리화학적 요인
최문섭,최기승,오계헌 대한환경공학회 2020 대한환경공학회지 Vol.42 No.8
Objective:With the ultimate aim of application for effluent treatment, the relationships between 1,4-dioxane degradation by microbial consortium CDIK-3 and several relevant physicochemical environmental parameters were investigated. Methods:Microbial consortium CDIK-3 enriched from an industrial wastewater sample developed to grow aerobically with 1,4-dioxane as the sole carbon substrate was used to evaluate the degradation of 1,4-dioxane depending on the various environmental parameters and HPLC methodology was used to measure residual 1,4-dioxane in the test consortium. Results and Discussion:The microbial consortium, designated CDIK-3, was originally enriched from industrial wastewater sample. Complete depletion of 1,000 mg/L 1,4-dioxane was achieved in this experiment within 168 h. Effective 1,4-dioxane degradation was observed in slightly alkaline conditions (pH 8) and 30℃. The effect of supplemented carbon and nitrogen (e.g., glucose, yeast extract, ethylene glycol, tetrahydrofuran) on the 1,4-dioxane degradation by the CDIK-3 test culture was evaluated. The results indicated that the addition of glucose, yeast extract, or tetrahydrofuran accelerated bacterial growth compared to growth in the absence of supplemented carbons. In contrast, the addition of low concentrations (≤100 mg/L) of ethylene glycol accelerated 1,4-dioxane degradation, but the degradation of 1,4-dioxane was delayed in the culture to which high concentrations (≥200 mg/L) of ethylene glycol were added. Conclusions:1,4-Dioxane as a wastewater contaminant can be removed by the microbial consortium CDIK-3 enriched from industrial wastewater. Effective 1,4-dioxane removal was obtained by the control of various physicochemical parameters. These results provide clues for understanding improved 1,4-dioxane degradation by microbial consortium CDIK-3 with relevant environmental parameters and possible applications in the processing of industrial wastewater containing relatively high 1,4-dioxane concentrations. 목적:폐수처리에 적용하기 위한 궁극적인 목표를 가지고, 미생물컨소시엄 CDIK-3에 의한 1,4-dioxane 분해와 여러 가지 관련 물리화학적 환경요인들과의 관계를 조사하였다. 재료 및 방법:1,4-Dioxane을 유일한 탄소원으로 사용하여 호기적 조건에서 생장할 수 있는 미생물컨소시엄 CDIK-3를 산업폐수로부터 농화를 통해 확보하였다. 여러 가지 환경요인에 따른 1,4-dioxane의 분해를 평가하였으며, HPLC를 사용하여 1,4-dioxane의 농도를 측정하였다. 결과 및 토의:CDIK-3로 지정된 미생물컨소시엄은 원래 산업폐수로부터 농화되었다. 1,000 mg/L의 1,4-dioxane은 168시간 이내에 완전히 분해되었으며, 효율적인 1,4-dioxane 분해는 약알칼리성(pH 8)과 30℃에서 각각 관찰되었다. CDIK-3의 배양에서 1,4-dioxane 분해에 영향을 미치는 부가탄소원 및 질소원(예, glucose, yeast extract, ethylene glycol, tetrahydrofuran)의 효과를 조사하였다. 그 결과, glucose, yeast extract, 또는 tetrahydrofuran의 첨가는 부가탄소원을 첨가하지 않은 것과 비교하여, 1,4-dioxane의 분해를 향상되었다. 반면에 ethylene glycol은 저농도(≤100 mg/L)에서 1,4-dioxane 분해가 향상되었으나, 고농도(≥200 mg/L)가 첨가된 경우에는 1,4-dioxane 분해가 지연되었다. 결론:폐수오염물질인 1,4-dioxane은 산업폐수로부터 농화된 미생물컨소시엄 CDIK-3에 의해 제거될 수 있다. 다양한 물리화학적 요인의 조절을 통하여 효율적인 1,4-dioxane의 제거가 이루어졌다. 이러한 결과는 적절한 환경요인들 하에서 배양된 미생물컨소시엄 CDIK-3에 의해 1,4-dioxane 분해가 향상되는 것을 이해하는데 단서를 제공하며, 상대적으로 고농도의 1,4-dioxane을 포함하는 산업폐수의 처리에 적용될 수 있다.