Non-thermal plasma processing using a dielectric barrier discharge (DBD) has been investigated as an alternative method for the degradation of non-biodegradable organic compounds in wastewater. The active species such as OH radical, produced by the electrical discharge may play an important role in degrading organic compound in water. The degradation of N, N-Dimethyl-4-nitrosoaniline (RNO) was investigated as an indicator of the generation of OH radical. The DBD plasma reactor of this study consisted of a plasma reactor, recycling pump, power supply and reservoir. The effect of diameter of external reactor (15 ∼ 40 mm), width of ground electrode (2.5 ∼ 30 cm), shape (pipe, spring) and material (copper, stainless steel and titanium) of ground electrode, water circulation rate (3.1 ∼ 54.8 cm/s), air flow rate (0.5 ∼ 3.0 L/min) and ratio of packing material (0 ∼ 100 %) were evaluated. The experimental results showed that shape and materials of ground were not influenced the RNO degradation. Optimum diameter of external reactor, water circulation rate and air flow rate for RNO degradation were 30 mm, 25.4 cm/s and 4 L/min, respectively. Ground electrode length to get the maximum RNO degradation was 30 cm, which was same as reactor length. Filling up of glass beads decreased the RNO degradation. Among the experimented parameters, air flow rate was most important parameters which are influenced the decomposition of RNO.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 분석 및 측정
 3. 결과 및 고찰
  3.1. RNO 분해에 미치는 외부 유리관 직경의 영향
  3.2. RNO 분해에 미치는 접지 전극 길이의 영향
  3.3. RNO 분해에 미치는 접지 전극 형태와 재질의 영향
  3.4. RNO 분해에 미치는 순환 유량의 영향
  3.5. RNO 분해에 미치는 공기 공급량의 영향
  3.6. RNO 분해에 미치는 충전물의 영향
 4. 결 론
 참 고 문 헌

• 김동석(대구가톨릭대학교 환경과학과) | Dong-Seog Kim (Department of Environmental Science, Catholic University of Daegu)
• 박영식(대구대학교 기초교육원) | Young-Seek Park (Faculty of Liberal Education, Daegu University) Corresponding author